Travel with Axel,
get the best price.

Saint Louis → Baltimore

Jan 21, 2027 · return Jan 26, 2027

STL → BWI1 adulteconomyRound trip

8 flight options · 4 airlines

Nonstop flights

Thu, Jan 21 – Tue, Jan 26

Southwest Airlines
6:35 amSTL
1h 55m
Nonstop
9:30 amBWI
Southwest Airlines
4:45 pmBWI
2h 20m
Nonstop
6:05 pmSTL

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Tue, Jan 26

Southwest Airlines
12:40 pmSTL
1h 50m
Nonstop
3:30 pmBWI
Southwest Airlines
4:45 pmBWI
2h 20m
Nonstop
6:05 pmSTL

Round-trip total · 1 adult · Taxes included

One-stop flights

Thu, Jan 21 – Tue, Jan 26

United Airlines
1:18 pmSTL
4h 51m
ORD · 1h 18m
7:09 pmBWI
Southwest Airlines
4:45 pmBWI
2h 20m
Nonstop
6:05 pmSTL

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Tue, Jan 26

American Airlines
11:37 amSTL
5h 8m
ORD · 1h 38m
5:45 pmBWI
American Airlines
2:26 pmBWI
6h 4m
CLT · 2h 27m
7:30 pmSTL

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Tue, Jan 26

Delta Air Lines
10:06 amSTL
4h 37m
ATL · 1h 23m
3:43 pmBWI
Delta Air Lines
12:18 pmBWI
6h 2m
DTW · 2h 38m
5:20 pmSTL

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Tue, Jan 26

Southwest Airlines
10:35 amSTL
4h 20m
BNA · 1h 35m
3:55 pmBWI
Southwest Airlines
4:45 pmBWI
2h 20m
Nonstop
6:05 pmSTL

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Tue, Jan 26

Southwest Airlines
5:30 amSTL
5h 10m
MDW · 2h 15m
11:40 amBWI
Southwest Airlines
4:45 pmBWI
2h 20m
Nonstop
6:05 pmSTL

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Tue, Jan 26

Delta Air Lines
6:06 pmSTL
4h 21m
DTW · 1h 9m
11:27 pmBWI
Delta Air Lines
12:18 pmBWI
6h 2m
DTW · 2h 38m
5:20 pmSTL

Round-trip total · 1 adult · Taxes included

Make this trip yours

STL ⇄ BWI

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Southwest Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

More dates

All dates for this routeNov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2027-01-21 → 2027-01-26Southwest AirlinesWN4124 / WN2730$294.502026-10-29T01:28:19Z
2027-01-21 → 2027-01-26United Airlines / Southwest AirlinesUA714 + UA399 / WN2730$308.752026-10-29T01:28:19Z
2027-01-21 → 2027-01-26American AirlinesAA3198 + AA4527 / AA2316 + AA2937$313.502026-10-29T01:28:19Z
2027-01-21 → 2027-01-26Delta Air LinesDL1571 + DL2799 / DL1546 + DL2822$332.502026-10-29T01:28:19Z
2027-01-21 → 2027-01-26Southwest AirlinesWN2834 / WN2730$294.502026-10-29T01:28:19Z
2027-01-21 → 2027-01-26Southwest AirlinesWN665 + WN477 / WN2730$285.002026-10-29T01:28:19Z
2027-01-21 → 2027-01-26Southwest AirlinesWN4173 + WN1123 / WN2730$285.002026-10-29T01:28:19Z
2027-01-21 → 2027-01-26Delta Air LinesDL2822 + DL2715 / DL1546 + DL2822$332.502026-10-29T01:28:19Z

2027-01-21 → 2027-01-26 · $294.50

  • Southwest Airlines WN4124: STL 2027-01-21 06:35:00 → BWI 2027-01-21 09:30:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN2730: BWI 2027-01-26 16:45:00 → STL 2027-01-26 18:05:00; nonstop; 140 minutes. Local airport times.

2027-01-21 → 2027-01-26 · $308.75

  • United Airlines UA714 / UA399: STL 2027-01-21 13:18:00 → BWI 2027-01-21 19:09:00; 1 stop(s) via ORD; 291 minutes. Local airport times.
    • UA714: STL 2027-01-21 13:18:00 → ORD 2027-01-21 14:47:00; layover at ORD: 78 minutes.
    • UA399: ORD 2027-01-21 16:05:00 → BWI 2027-01-21 19:09:00.
  • Southwest Airlines WN2730: BWI 2027-01-26 16:45:00 → STL 2027-01-26 18:05:00; nonstop; 140 minutes. Local airport times.

2027-01-21 → 2027-01-26 · $313.50

  • American Airlines AA3198 / AA4527: STL 2027-01-21 11:37:00 → BWI 2027-01-21 17:45:00; 1 stop(s) via ORD; 308 minutes. Local airport times.
    • AA3198: STL 2027-01-21 11:37:00 → ORD 2027-01-21 12:59:00; layover at ORD: 98 minutes.
    • AA4527: ORD 2027-01-21 14:37:00 → BWI 2027-01-21 17:45:00.
  • American Airlines AA2316 / AA2937: BWI 2027-01-26 14:26:00 → STL 2027-01-26 19:30:00; 1 stop(s) via CLT; 364 minutes. Local airport times.
    • AA2316: BWI 2027-01-26 14:26:00 → CLT 2027-01-26 16:00:00; layover at CLT: 147 minutes.
    • AA2937: CLT 2027-01-26 18:27:00 → STL 2027-01-26 19:30:00.

2027-01-21 → 2027-01-26 · $332.50

  • Delta Air Lines DL1571 / DL2799: STL 2027-01-21 10:06:00 → BWI 2027-01-21 15:43:00; 1 stop(s) via ATL; 277 minutes. Local airport times.
    • DL1571: STL 2027-01-21 10:06:00 → ATL 2027-01-21 12:36:00; layover at ATL: 83 minutes.
    • DL2799: ATL 2027-01-21 13:59:00 → BWI 2027-01-21 15:43:00.
  • Delta Air Lines DL1546 / DL2822: BWI 2027-01-26 12:18:00 → STL 2027-01-26 17:20:00; 1 stop(s) via DTW; 362 minutes. Local airport times.
    • DL1546: BWI 2027-01-26 12:18:00 → DTW 2027-01-26 13:55:00; layover at DTW: 158 minutes.
    • DL2822: DTW 2027-01-26 16:33:00 → STL 2027-01-26 17:20:00.

2027-01-21 → 2027-01-26 · $294.50

  • Southwest Airlines WN2834: STL 2027-01-21 12:40:00 → BWI 2027-01-21 15:30:00; nonstop; 110 minutes. Local airport times.
  • Southwest Airlines WN2730: BWI 2027-01-26 16:45:00 → STL 2027-01-26 18:05:00; nonstop; 140 minutes. Local airport times.

2027-01-21 → 2027-01-26 · $285.00

  • Southwest Airlines WN665 / WN477: STL 2027-01-21 10:35:00 → BWI 2027-01-21 15:55:00; 1 stop(s) via BNA; 260 minutes. Local airport times.
    • WN665: STL 2027-01-21 10:35:00 → BNA 2027-01-21 11:40:00; layover at BNA: 95 minutes.
    • WN477: BNA 2027-01-21 13:15:00 → BWI 2027-01-21 15:55:00.
  • Southwest Airlines WN2730: BWI 2027-01-26 16:45:00 → STL 2027-01-26 18:05:00; nonstop; 140 minutes. Local airport times.

2027-01-21 → 2027-01-26 · $285.00

  • Southwest Airlines WN4173 / WN1123: STL 2027-01-21 05:30:00 → BWI 2027-01-21 11:40:00; 1 stop(s) via MDW; 310 minutes. Local airport times.
    • WN4173: STL 2027-01-21 05:30:00 → MDW 2027-01-21 06:35:00; layover at MDW: 135 minutes.
    • WN1123: MDW 2027-01-21 08:50:00 → BWI 2027-01-21 11:40:00.
  • Southwest Airlines WN2730: BWI 2027-01-26 16:45:00 → STL 2027-01-26 18:05:00; nonstop; 140 minutes. Local airport times.

2027-01-21 → 2027-01-26 · $332.50

  • Delta Air Lines DL2822 / DL2715: STL 2027-01-21 18:06:00 → BWI 2027-01-21 23:27:00; 1 stop(s) via DTW; 261 minutes. Local airport times.
    • DL2822: STL 2027-01-21 18:06:00 → DTW 2027-01-21 20:45:00; layover at DTW: 69 minutes.
    • DL2715: DTW 2027-01-21 21:54:00 → BWI 2027-01-21 23:27:00.
  • Delta Air Lines DL1546 / DL2822: BWI 2027-01-26 12:18:00 → STL 2027-01-26 17:20:00; 1 stop(s) via DTW; 362 minutes. Local airport times.
    • DL1546: BWI 2027-01-26 12:18:00 → DTW 2027-01-26 13:55:00; layover at DTW: 158 minutes.
    • DL2822: DTW 2027-01-26 16:33:00 → STL 2027-01-26 17:20:00.

More dates for this route