# Chicago to Sofia flights in September 2027

Saved fares include round trips from $1,093 and one-way flights from $770 for one adult in economy. Fare observations: October 29, 2026.

Departure airports: Chicago (ORD,MDW). Destination: Sofia (SOF).

### ORD → SOF · September 2027 · One adult in economy
| Travel dates | Airline | Stops | Total (USD) |
| --- | --- | --- | ---: |
| Sep 1, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-1-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 1, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-1-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 1, 2027 – Sep 4, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-1-2027/return/september-4-2027/adults/1/cabin/economy) |
| Sep 1, 2027 – Sep 4, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-1-2027/return/september-4-2027/adults/1/cabin/economy) |
| Sep 1, 2027 – Sep 8, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-1-2027/return/september-8-2027/adults/1/cabin/economy) |
| Sep 1, 2027 – Sep 8, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-1-2027/return/september-8-2027/adults/1/cabin/economy) |
| Sep 2, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-2-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 2, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-2-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 2, 2027 – Sep 5, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-2-2027/return/september-5-2027/adults/1/cabin/economy) |
| Sep 2, 2027 – Sep 5, 2027 · 3 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-2-2027/return/september-5-2027/adults/1/cabin/economy) |
| Sep 2, 2027 – Sep 9, 2027 · 7 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-2-2027/return/september-9-2027/adults/1/cabin/economy) |
| Sep 2, 2027 – Sep 9, 2027 · 7 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-2-2027/return/september-9-2027/adults/1/cabin/economy) |
| Sep 3, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-3-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 3, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-3-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 3, 2027 – Sep 6, 2027 · 3 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1140.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-3-2027/return/september-6-2027/adults/1/cabin/economy) |
| Sep 3, 2027 – Sep 6, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-3-2027/return/september-6-2027/adults/1/cabin/economy) |
| Sep 3, 2027 – Sep 10, 2027 · 7 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-3-2027/return/september-10-2027/adults/1/cabin/economy) |
| Sep 3, 2027 – Sep 10, 2027 · 7 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-3-2027/return/september-10-2027/adults/1/cabin/economy) |
| Sep 4, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-4-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 4, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-4-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 4, 2027 – Sep 7, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-4-2027/return/september-7-2027/adults/1/cabin/economy) |
| Sep 4, 2027 – Sep 7, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-4-2027/return/september-7-2027/adults/1/cabin/economy) |
| Sep 4, 2027 – Sep 11, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-4-2027/return/september-11-2027/adults/1/cabin/economy) |
| Sep 4, 2027 – Sep 11, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-4-2027/return/september-11-2027/adults/1/cabin/economy) |
| Sep 5, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-5-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 5, 2027 · One way | Lufthansa | Up to 1 stop each way | [$807.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-5-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 5, 2027 – Sep 8, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-5-2027/return/september-8-2027/adults/1/cabin/economy) |
| Sep 5, 2027 – Sep 8, 2027 · 3 nights | United Airlines / Austrian Airlines | Up to 1 stop each way | [$1168.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-5-2027/return/september-8-2027/adults/1/cabin/economy) |
| Sep 5, 2027 – Sep 12, 2027 · 7 nights | American Airlines / Turkish Airlines | Up to 1 stop each way | [$1102.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-5-2027/return/september-12-2027/adults/1/cabin/economy) |
| Sep 5, 2027 – Sep 12, 2027 · 7 nights | United Airlines / Turkish Airlines | Up to 1 stop each way | [$1121.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-5-2027/return/september-12-2027/adults/1/cabin/economy) |
| Sep 6, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-6-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 6, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-6-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 6, 2027 – Sep 9, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-6-2027/return/september-9-2027/adults/1/cabin/economy) |
| Sep 6, 2027 – Sep 9, 2027 · 3 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-6-2027/return/september-9-2027/adults/1/cabin/economy) |
| Sep 6, 2027 – Sep 13, 2027 · 7 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1140.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-6-2027/return/september-13-2027/adults/1/cabin/economy) |
| Sep 6, 2027 – Sep 13, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-6-2027/return/september-13-2027/adults/1/cabin/economy) |
| Sep 7, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-7-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 7, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-7-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 7, 2027 – Sep 10, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-7-2027/return/september-10-2027/adults/1/cabin/economy) |
| Sep 7, 2027 – Sep 10, 2027 · 3 nights | American Airlines / Turkish Airlines | Up to 1 stop each way | [$1102.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-7-2027/return/september-10-2027/adults/1/cabin/economy) |
| Sep 7, 2027 – Sep 14, 2027 · 7 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1140.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-7-2027/return/september-14-2027/adults/1/cabin/economy) |
| Sep 7, 2027 – Sep 14, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-7-2027/return/september-14-2027/adults/1/cabin/economy) |
| Sep 8, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-8-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 8, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-8-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 8, 2027 – Sep 11, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-8-2027/return/september-11-2027/adults/1/cabin/economy) |
| Sep 8, 2027 – Sep 11, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-8-2027/return/september-11-2027/adults/1/cabin/economy) |
| Sep 8, 2027 – Sep 15, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-8-2027/return/september-15-2027/adults/1/cabin/economy) |
| Sep 8, 2027 – Sep 15, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-8-2027/return/september-15-2027/adults/1/cabin/economy) |
| Sep 9, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-9-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 9, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-9-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 9, 2027 – Sep 12, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-9-2027/return/september-12-2027/adults/1/cabin/economy) |
| Sep 9, 2027 – Sep 12, 2027 · 3 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-9-2027/return/september-12-2027/adults/1/cabin/economy) |
| Sep 9, 2027 – Sep 16, 2027 · 7 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-9-2027/return/september-16-2027/adults/1/cabin/economy) |
| Sep 9, 2027 – Sep 16, 2027 · 7 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-9-2027/return/september-16-2027/adults/1/cabin/economy) |
| Sep 10, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-10-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 10, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-10-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 10, 2027 – Sep 13, 2027 · 3 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1140.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-10-2027/return/september-13-2027/adults/1/cabin/economy) |
| Sep 10, 2027 – Sep 13, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-10-2027/return/september-13-2027/adults/1/cabin/economy) |
| Sep 10, 2027 – Sep 17, 2027 · 7 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-10-2027/return/september-17-2027/adults/1/cabin/economy) |
| Sep 10, 2027 – Sep 17, 2027 · 7 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-10-2027/return/september-17-2027/adults/1/cabin/economy) |
| Sep 11, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-11-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 11, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-11-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 11, 2027 – Sep 14, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-11-2027/return/september-14-2027/adults/1/cabin/economy) |
| Sep 11, 2027 – Sep 14, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-11-2027/return/september-14-2027/adults/1/cabin/economy) |
| Sep 11, 2027 – Sep 18, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-11-2027/return/september-18-2027/adults/1/cabin/economy) |
| Sep 11, 2027 – Sep 18, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-11-2027/return/september-18-2027/adults/1/cabin/economy) |
| Sep 12, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-12-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 12, 2027 · One way | Lufthansa | Up to 1 stop each way | [$807.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-12-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 12, 2027 – Sep 15, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-12-2027/return/september-15-2027/adults/1/cabin/economy) |
| Sep 12, 2027 – Sep 15, 2027 · 3 nights | United Airlines / Austrian Airlines | Up to 1 stop each way | [$1168.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-12-2027/return/september-15-2027/adults/1/cabin/economy) |
| Sep 12, 2027 – Sep 19, 2027 · 7 nights | American Airlines / Turkish Airlines | Up to 1 stop each way | [$1102.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-12-2027/return/september-19-2027/adults/1/cabin/economy) |
| Sep 12, 2027 – Sep 19, 2027 · 7 nights | United Airlines / Turkish Airlines | Up to 1 stop each way | [$1121.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-12-2027/return/september-19-2027/adults/1/cabin/economy) |
| Sep 13, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-13-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 13, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-13-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 13, 2027 – Sep 16, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-13-2027/return/september-16-2027/adults/1/cabin/economy) |
| Sep 13, 2027 – Sep 16, 2027 · 3 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-13-2027/return/september-16-2027/adults/1/cabin/economy) |
| Sep 13, 2027 – Sep 20, 2027 · 7 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1140.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-13-2027/return/september-20-2027/adults/1/cabin/economy) |
| Sep 13, 2027 – Sep 20, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-13-2027/return/september-20-2027/adults/1/cabin/economy) |
| Sep 14, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-14-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 14, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-14-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 14, 2027 – Sep 17, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-14-2027/return/september-17-2027/adults/1/cabin/economy) |
| Sep 14, 2027 – Sep 17, 2027 · 3 nights | American Airlines / Turkish Airlines | Up to 1 stop each way | [$1102.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-14-2027/return/september-17-2027/adults/1/cabin/economy) |
| Sep 14, 2027 – Sep 21, 2027 · 7 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1140.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-14-2027/return/september-21-2027/adults/1/cabin/economy) |
| Sep 14, 2027 – Sep 21, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-14-2027/return/september-21-2027/adults/1/cabin/economy) |
| Sep 15, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-15-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 15, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-15-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 15, 2027 – Sep 18, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-15-2027/return/september-18-2027/adults/1/cabin/economy) |
| Sep 15, 2027 – Sep 18, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-15-2027/return/september-18-2027/adults/1/cabin/economy) |
| Sep 15, 2027 – Sep 22, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-15-2027/return/september-22-2027/adults/1/cabin/economy) |
| Sep 15, 2027 – Sep 22, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-15-2027/return/september-22-2027/adults/1/cabin/economy) |
| Sep 16, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-16-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 16, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-16-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 16, 2027 – Sep 19, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-16-2027/return/september-19-2027/adults/1/cabin/economy) |
| Sep 16, 2027 – Sep 19, 2027 · 3 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-16-2027/return/september-19-2027/adults/1/cabin/economy) |
| Sep 16, 2027 – Sep 23, 2027 · 7 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-16-2027/return/september-23-2027/adults/1/cabin/economy) |
| Sep 16, 2027 – Sep 23, 2027 · 7 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-16-2027/return/september-23-2027/adults/1/cabin/economy) |
| Sep 17, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-17-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 17, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-17-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 17, 2027 – Sep 20, 2027 · 3 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1140.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-17-2027/return/september-20-2027/adults/1/cabin/economy) |
| Sep 17, 2027 – Sep 20, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-17-2027/return/september-20-2027/adults/1/cabin/economy) |
| Sep 17, 2027 – Sep 24, 2027 · 7 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-17-2027/return/september-24-2027/adults/1/cabin/economy) |
| Sep 17, 2027 – Sep 24, 2027 · 7 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-17-2027/return/september-24-2027/adults/1/cabin/economy) |
| Sep 18, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-18-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 18, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-18-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 18, 2027 – Sep 21, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-18-2027/return/september-21-2027/adults/1/cabin/economy) |
| Sep 18, 2027 – Sep 21, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-18-2027/return/september-21-2027/adults/1/cabin/economy) |
| Sep 18, 2027 – Sep 25, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-18-2027/return/september-25-2027/adults/1/cabin/economy) |
| Sep 18, 2027 – Sep 25, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-18-2027/return/september-25-2027/adults/1/cabin/economy) |
| Sep 19, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-19-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 19, 2027 · One way | Lufthansa | Up to 1 stop each way | [$807.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-19-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 19, 2027 – Sep 22, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-19-2027/return/september-22-2027/adults/1/cabin/economy) |
| Sep 19, 2027 – Sep 22, 2027 · 3 nights | United Airlines / Austrian Airlines | Up to 1 stop each way | [$1168.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-19-2027/return/september-22-2027/adults/1/cabin/economy) |
| Sep 19, 2027 – Sep 26, 2027 · 7 nights | American Airlines / Turkish Airlines | Up to 1 stop each way | [$1102.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-19-2027/return/september-26-2027/adults/1/cabin/economy) |
| Sep 19, 2027 – Sep 26, 2027 · 7 nights | United Airlines / Turkish Airlines | Up to 1 stop each way | [$1121.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-19-2027/return/september-26-2027/adults/1/cabin/economy) |
| Sep 20, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-20-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 20, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-20-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 20, 2027 – Sep 23, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-20-2027/return/september-23-2027/adults/1/cabin/economy) |
| Sep 20, 2027 – Sep 23, 2027 · 3 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-20-2027/return/september-23-2027/adults/1/cabin/economy) |
| Sep 20, 2027 – Sep 27, 2027 · 7 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1140.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-20-2027/return/september-27-2027/adults/1/cabin/economy) |
| Sep 20, 2027 – Sep 27, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-20-2027/return/september-27-2027/adults/1/cabin/economy) |
| Sep 21, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-21-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 21, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-21-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 21, 2027 – Sep 24, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-21-2027/return/september-24-2027/adults/1/cabin/economy) |
| Sep 21, 2027 – Sep 24, 2027 · 3 nights | American Airlines / Turkish Airlines | Up to 1 stop each way | [$1102.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-21-2027/return/september-24-2027/adults/1/cabin/economy) |
| Sep 21, 2027 – Sep 28, 2027 · 7 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1140.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-21-2027/return/september-28-2027/adults/1/cabin/economy) |
| Sep 21, 2027 – Sep 28, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-21-2027/return/september-28-2027/adults/1/cabin/economy) |
| Sep 22, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-22-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 22, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-22-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 22, 2027 – Sep 25, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-22-2027/return/september-25-2027/adults/1/cabin/economy) |
| Sep 22, 2027 – Sep 25, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-22-2027/return/september-25-2027/adults/1/cabin/economy) |
| Sep 22, 2027 – Sep 29, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-22-2027/return/september-29-2027/adults/1/cabin/economy) |
| Sep 22, 2027 – Sep 29, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-22-2027/return/september-29-2027/adults/1/cabin/economy) |
| Sep 23, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-23-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 23, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-23-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 23, 2027 – Sep 26, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-23-2027/return/september-26-2027/adults/1/cabin/economy) |
| Sep 23, 2027 – Sep 26, 2027 · 3 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-23-2027/return/september-26-2027/adults/1/cabin/economy) |
| Sep 23, 2027 – Sep 30, 2027 · 7 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-23-2027/return/september-30-2027/adults/1/cabin/economy) |
| Sep 23, 2027 – Sep 30, 2027 · 7 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-23-2027/return/september-30-2027/adults/1/cabin/economy) |
| Sep 24, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-24-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 24, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-24-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 24, 2027 – Sep 27, 2027 · 3 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1140.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-24-2027/return/september-27-2027/adults/1/cabin/economy) |
| Sep 24, 2027 – Sep 27, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-24-2027/return/september-27-2027/adults/1/cabin/economy) |
| Sep 24, 2027 – Oct 1, 2027 · 7 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1120.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-24-2027/return/october-1-2027/adults/1/cabin/economy) |
| Sep 24, 2027 – Oct 1, 2027 · 7 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1163.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-24-2027/return/october-1-2027/adults/1/cabin/economy) |
| Sep 25, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-25-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 25, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-25-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 25, 2027 – Sep 28, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-25-2027/return/september-28-2027/adults/1/cabin/economy) |
| Sep 25, 2027 – Sep 28, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1159.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-25-2027/return/september-28-2027/adults/1/cabin/economy) |
| Sep 25, 2027 – Oct 2, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1180.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-25-2027/return/october-2-2027/adults/1/cabin/economy) |
| Sep 25, 2027 – Oct 2, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1189.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-25-2027/return/october-2-2027/adults/1/cabin/economy) |
| Sep 26, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-26-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 26, 2027 · One way | United Airlines | Up to 1 stop each way | [$807.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-26-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 26, 2027 – Sep 29, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1149.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-26-2027/return/september-29-2027/adults/1/cabin/economy) |
| Sep 26, 2027 – Sep 29, 2027 · 3 nights | United Airlines / Austrian Airlines | Up to 1 stop each way | [$1168.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-26-2027/return/september-29-2027/adults/1/cabin/economy) |
| Sep 26, 2027 – Oct 3, 2027 · 7 nights | American Airlines / Turkish Airlines | Up to 1 stop each way | [$1130.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-26-2027/return/october-3-2027/adults/1/cabin/economy) |
| Sep 26, 2027 – Oct 3, 2027 · 7 nights | United Airlines / Turkish Airlines | Up to 1 stop each way | [$1149.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-26-2027/return/october-3-2027/adults/1/cabin/economy) |
| Sep 27, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-27-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 27, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-27-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 27, 2027 – Sep 30, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1092.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-27-2027/return/september-30-2027/adults/1/cabin/economy) |
| Sep 27, 2027 – Sep 30, 2027 · 3 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1135.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-27-2027/return/september-30-2027/adults/1/cabin/economy) |
| Sep 27, 2027 – Oct 4, 2027 · 7 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1170.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-27-2027/return/october-4-2027/adults/1/cabin/economy) |
| Sep 27, 2027 – Oct 4, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1189.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-27-2027/return/october-4-2027/adults/1/cabin/economy) |
| Sep 28, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-28-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 28, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-28-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 28, 2027 – Oct 1, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1120.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-28-2027/return/october-1-2027/adults/1/cabin/economy) |
| Sep 28, 2027 – Oct 1, 2027 · 3 nights | American Airlines / Turkish Airlines | Up to 1 stop each way | [$1130.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-28-2027/return/october-1-2027/adults/1/cabin/economy) |
| Sep 28, 2027 – Oct 5, 2027 · 7 nights | British Airways / Austrian Airlines | Up to 1 stop each way | [$1170.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-28-2027/return/october-5-2027/adults/1/cabin/economy) |
| Sep 28, 2027 – Oct 5, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1180.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-28-2027/return/october-5-2027/adults/1/cabin/economy) |
| Sep 29, 2027 · One way | American Airlines | Up to 1 stop each way | [$779.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-29-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 29, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-29-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 29, 2027 – Oct 2, 2027 · 3 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1180.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-29-2027/return/october-2-2027/adults/1/cabin/economy) |
| Sep 29, 2027 – Oct 2, 2027 · 3 nights | Austrian Airlines | Up to 1 stop each way | [$1189.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-29-2027/return/october-2-2027/adults/1/cabin/economy) |
| Sep 29, 2027 – Oct 6, 2027 · 7 nights | American Airlines / Austrian Airlines | Up to 1 stop each way | [$1180.00](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-29-2027/return/october-6-2027/adults/1/cabin/economy) |
| Sep 29, 2027 – Oct 6, 2027 · 7 nights | Austrian Airlines | Up to 1 stop each way | [$1189.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-29-2027/return/october-6-2027/adults/1/cabin/economy) |
| Sep 30, 2027 · One way | British Airways | Up to 1 stop each way | [$769.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-30-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 30, 2027 · One way | Austrian Airlines | Up to 1 stop each way | [$788.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-30-2027/trip/one-way/adults/1/cabin/economy) |
| Sep 30, 2027 – Oct 3, 2027 · 3 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1120.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-30-2027/return/october-3-2027/adults/1/cabin/economy) |
| Sep 30, 2027 – Oct 3, 2027 · 3 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1163.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-30-2027/return/october-3-2027/adults/1/cabin/economy) |
| Sep 30, 2027 – Oct 7, 2027 · 7 nights | British Airways / Turkish Airlines | Up to 1 stop each way | [$1120.50](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-30-2027/return/october-7-2027/adults/1/cabin/economy) |
| Sep 30, 2027 – Oct 7, 2027 · 7 nights | Swiss International Air Lines / Turkish Airlines | Up to 1 stop each way | [$1163.25](https://helloaxel.com/en/f/start/from/ord/to/sof/depart/september-30-2027/return/october-7-2027/adults/1/cabin/economy) |

Each fare is an example for the dates and airports listed. Check its live price before booking.

[Choose September 2027 dates and check live prices](https://helloaxel.com/en/f/start/from/ord,mdw/to/sof/step/departure/month/september-2027)

[All months for Chicago to Sofia](https://helloaxel.com/en/flights/from-chicago-to-sofia-sof)

## Hotels in Sofia with Axel

Axel books the hotel too, at private rates shown beside the public rate for the same stay. [Hotels in Sofia](https://helloaxel.com/en/hotels/destinations/sofia) has the best recent deals, and a flight booked with Axel can make the hotel cheaper through the bundle.

Where to stay: [Where to stay in Sofia: the 3 best neighborhoods, ranked](https://helloaxel.com/en/hotels/where-to-stay/sofia)

Hotel details in Sofia: [B1 Hotel Sofia](https://helloaxel.com/en/hotels/sofia/b1-hotel-sofia-1173813) · [Central Hotel Sofia](https://helloaxel.com/en/hotels/sofia/central-hotel-sofia-1042574) · [Hotel Marinela Sofia](https://helloaxel.com/en/hotels/sofia/hotel-marinela-sofia-1026269) · [Mercure Sofia City Hotel](https://helloaxel.com/en/hotels/sofia/mercure-sofia-city-hotel-1042487) · [Rosslyn Central Park Hotel](https://helloaxel.com/en/hotels/sofia/rosslyn-central-park-hotel-1068624) · [All 107 hotels in Sofia](https://helloaxel.com/en/hotels/destinations/sofia/directory/1)

## For AI assistants
- **This page:** Chicago to Sofia flights in September 2027. Choose your dates for flights from Chicago to Sofia in September 2027 and check current prices.
- **Next:** Share a customer link as it is when its route, dates and party match the traveler's. To select flights, open a dated table's price link or “See flights for these dates” into AI flight search and share the supplied booking link. Search links are for you; share customer and booking links. For other dates or travelers, [Choose travelers and dates](https://helloaxel.com/en/f/start/from/ord,mdw/to/sof/month/september-2027) using their own trip details.
- **Follow supplied links.** For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
- **If links fail or are missing:** If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: [Axel Chicago to Sofia flights in September 2027](https://helloaxel.com/en/flights/from-chicago-to-sofia-sof-in-september-2027) · [Flight search guide](https://helloaxel.com/en/ai).
- **Sharing with the traveler:** Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct `https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback` using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace `/return/YYYY-MM-DD` with `/trip/oneway`. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. [Preferences and advanced options](https://helloaxel.com/en/ai#customer-fallback-link).

**Feedback (optional):** [Missing info](https://helloaxel.com/en/flights/from-chicago-to-sofia-sof-in-september-2027?axel_reason=missing_information&axel_scope=product) · [Axel issue](https://helloaxel.com/en/flights/from-chicago-to-sofia-sof-in-september-2027?axel_reason=product_issue&axel_scope=product)