Boston (BOS) to Saint Louis (STL) · Jan 3, 2027 · choose your return date

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

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown.

Date links open published trip details for exploration. Price links open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

Route overview: Boston to Saint Louis (STL) flight deals

2027-01-03 · one way · Axel-exclusive $171.10

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.

2027-01-03 · one way · Axel-exclusive $177.00

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.

2027-01-03 → 2027-01-04 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA4406 / UA1392: STL 2027-01-04 08:30:00 → BOS 2027-01-04 14:32:00; 1 stop(s) via IAD; 302 minutes. Local airport times.
  • UA4406: STL 2027-01-04 08:30:00 → IAD 2027-01-04 11:35:00; layover at IAD: 75 minutes.
  • UA1392: IAD 2027-01-04 12:50:00 → BOS 2027-01-04 14:32:00.

2027-01-03 → 2027-01-04 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN4918: STL 2027-01-04 10:15:00 → BOS 2027-01-04 13:45:00; nonstop; 150 minutes. Local airport times.

2027-01-03 → 2027-01-05 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA4406 / UA1392: STL 2027-01-05 08:30:00 → BOS 2027-01-05 14:32:00; 1 stop(s) via IAD; 302 minutes. Local airport times.
  • UA4406: STL 2027-01-05 08:30:00 → IAD 2027-01-05 11:35:00; layover at IAD: 75 minutes.
  • UA1392: IAD 2027-01-05 12:50:00 → BOS 2027-01-05 14:32:00.

2027-01-03 → 2027-01-05 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN3667: STL 2027-01-05 13:20:00 → BOS 2027-01-05 16:50:00; nonstop; 150 minutes. Local airport times.

2027-01-03 → 2027-01-06 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA1344 / UA1669: STL 2027-01-06 06:00:00 → BOS 2027-01-06 12:27:00; 1 stop(s) via EWR; 327 minutes. Local airport times.
  • UA1344: STL 2027-01-06 06:00:00 → EWR 2027-01-06 09:21:00; layover at EWR: 115 minutes.
  • UA1669: EWR 2027-01-06 11:16:00 → BOS 2027-01-06 12:27:00.

2027-01-03 → 2027-01-06 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-01-06 18:10:00 → BOS 2027-01-06 21:45:00; nonstop; 155 minutes. Local airport times.

2027-01-03 → 2027-01-07 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA4406 / UA1392: STL 2027-01-07 08:30:00 → BOS 2027-01-07 14:32:00; 1 stop(s) via IAD; 302 minutes. Local airport times.
  • UA4406: STL 2027-01-07 08:30:00 → IAD 2027-01-07 11:35:00; layover at IAD: 75 minutes.
  • UA1392: IAD 2027-01-07 12:50:00 → BOS 2027-01-07 14:32:00.

2027-01-03 → 2027-01-07 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-01-07 18:10:00 → BOS 2027-01-07 21:45:00; nonstop; 155 minutes. Local airport times.

2027-01-03 → 2027-01-09 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA4406 / UA1392: STL 2027-01-09 08:30:00 → BOS 2027-01-09 14:32:00; 1 stop(s) via IAD; 302 minutes. Local airport times.
  • UA4406: STL 2027-01-09 08:30:00 → IAD 2027-01-09 11:35:00; layover at IAD: 75 minutes.
  • UA1392: IAD 2027-01-09 12:50:00 → BOS 2027-01-09 14:32:00.

2027-01-03 → 2027-01-09 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN570: STL 2027-01-09 08:10:00 → BOS 2027-01-09 11:40:00; nonstop; 150 minutes. Local airport times.

2027-01-03 → 2027-01-10 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA1344 / UA1669: STL 2027-01-10 06:00:00 → BOS 2027-01-10 12:27:00; 1 stop(s) via EWR; 327 minutes. Local airport times.
  • UA1344: STL 2027-01-10 06:00:00 → EWR 2027-01-10 09:21:00; layover at EWR: 115 minutes.
  • UA1669: EWR 2027-01-10 11:16:00 → BOS 2027-01-10 12:27:00.

2027-01-03 → 2027-01-10 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-01-10 20:50:00 → BOS 2027-01-11 00:15:00; nonstop; 145 minutes. Local airport times.

2027-01-03 → 2027-01-11 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA4406 / UA1392: STL 2027-01-11 08:30:00 → BOS 2027-01-11 14:32:00; 1 stop(s) via IAD; 302 minutes. Local airport times.
  • UA4406: STL 2027-01-11 08:30:00 → IAD 2027-01-11 11:35:00; layover at IAD: 75 minutes.
  • UA1392: IAD 2027-01-11 12:50:00 → BOS 2027-01-11 14:32:00.

2027-01-03 → 2027-01-11 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN4918: STL 2027-01-11 10:15:00 → BOS 2027-01-11 13:45:00; nonstop; 150 minutes. Local airport times.

2027-01-03 → 2027-01-13 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA1344 / UA1669: STL 2027-01-13 06:00:00 → BOS 2027-01-13 12:27:00; 1 stop(s) via EWR; 327 minutes. Local airport times.
  • UA1344: STL 2027-01-13 06:00:00 → EWR 2027-01-13 09:21:00; layover at EWR: 115 minutes.
  • UA1669: EWR 2027-01-13 11:16:00 → BOS 2027-01-13 12:27:00.

2027-01-03 → 2027-01-13 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-01-13 18:10:00 → BOS 2027-01-13 21:45:00; nonstop; 155 minutes. Local airport times.

2027-01-03 → 2027-01-14 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA4406 / UA1392: STL 2027-01-14 08:30:00 → BOS 2027-01-14 14:32:00; 1 stop(s) via IAD; 302 minutes. Local airport times.
  • UA4406: STL 2027-01-14 08:30:00 → IAD 2027-01-14 11:35:00; layover at IAD: 75 minutes.
  • UA1392: IAD 2027-01-14 12:50:00 → BOS 2027-01-14 14:32:00.

2027-01-03 → 2027-01-14 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-01-14 18:10:00 → BOS 2027-01-14 21:45:00; nonstop; 155 minutes. Local airport times.

2027-01-03 → 2027-01-15 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA4406 / UA1392: STL 2027-01-15 08:30:00 → BOS 2027-01-15 14:32:00; 1 stop(s) via IAD; 302 minutes. Local airport times.
  • UA4406: STL 2027-01-15 08:30:00 → IAD 2027-01-15 11:35:00; layover at IAD: 75 minutes.
  • UA1392: IAD 2027-01-15 12:50:00 → BOS 2027-01-15 14:32:00.

2027-01-03 → 2027-01-15 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-01-15 19:55:00 → BOS 2027-01-15 23:25:00; nonstop; 150 minutes. Local airport times.

2027-01-03 → 2027-01-17 · Axel-exclusive $287.55

• United Airlines UA1734 / UA4427: BOS 2027-01-03 05:45:00 → STL 2027-01-03 10:12:00; 1 stop(s) via IAD; 327 minutes. Local airport times.
  • UA1734: BOS 2027-01-03 05:45:00 → IAD 2027-01-03 07:25:00; layover at IAD: 75 minutes.
  • UA4427: IAD 2027-01-03 08:40:00 → STL 2027-01-03 10:12:00.
• United Airlines UA1344 / UA1669: STL 2027-01-17 06:00:00 → BOS 2027-01-17 12:27:00; 1 stop(s) via EWR; 327 minutes. Local airport times.
  • UA1344: STL 2027-01-17 06:00:00 → EWR 2027-01-17 09:21:00; layover at EWR: 115 minutes.
  • UA1669: EWR 2027-01-17 11:16:00 → BOS 2027-01-17 12:27:00.

2027-01-03 → 2027-01-17 · Axel-exclusive $298.20

• Southwest Airlines WN819: BOS 2027-01-03 05:10:00 → STL 2027-01-03 07:15:00; nonstop; 185 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-01-17 20:50:00 → BOS 2027-01-18 00:15:00; nonstop; 145 minutes. Local airport times.

Explore this route

• All dates for this route
• Jan 2, 2027 · Return options
• Jan 4, 2027 · Return options
• Hotels in St. Louis with Axel

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• This page: Boston (BOS) to Saint Louis (STL) · Jan 3, 2027 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
• Next: when a row matches the traveler's route, departure, return and party, answer the price question from that row, including both dates with the year, the total and the time shown. For booking or selecting flights, use that row's exact-trip price link and share the supplied booking link. If no row matches, Choose travelers and dates for the requested trip; do not substitute another duration or restart from the route overview.
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