Saint Louis (STL) to Boston (BOS), Dec 4–6, 2026: from $145 one way

Saint Louis (STL) to Boston (BOS), Dec 4–6, 2026: from $145 one way on Axel, checked Oct 29, 2026. Lowest published fare: $145 one way, Axel-exclusive, Southwest Airlines, 1 stop, Dec 4, 2026, 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

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

2026-12-05 · one way · Axel-exclusive $160.00

• Southwest Airlines WN2755: STL 2026-12-05 20:15:00 → BOS 2026-12-05 23:45:00; nonstop; 150 minutes. Local airport times.

2026-12-06 · one way · Axel-exclusive $165.00

• American Airlines AA4801: STL 2026-12-06 13:15:00 → BOS 2026-12-06 16:55:00; nonstop; 160 minutes. Local airport times.

2026-12-06 · one way · Axel-exclusive $155.00

• United Airlines UA1344 / UA1669: STL 2026-12-06 06:00:00 → BOS 2026-12-06 12:27:00; 1 stop(s) via EWR; 327 minutes. Local airport times.
  • UA1344: STL 2026-12-06 06:00:00 → EWR 2026-12-06 09:21:00; layover at EWR: 115 minutes.
  • UA1669: EWR 2026-12-06 11:16:00 → BOS 2026-12-06 12:27:00.

2026-12-04 · one way · Axel-exclusive $160.00

• Delta Air Lines DL2868 / DL1171: STL 2026-12-04 10:14:00 → BOS 2026-12-04 16:04:00; 1 stop(s) via DTW; 290 minutes. Local airport times.
  • DL2868: STL 2026-12-04 10:14:00 → DTW 2026-12-04 12:46:00; layover at DTW: 81 minutes.
  • DL1171: DTW 2026-12-04 14:07:00 → BOS 2026-12-04 16:04:00.

2026-12-04 · one way · Axel-exclusive $160.00

• Southwest Airlines WN4918: STL 2026-12-04 10:15:00 → BOS 2026-12-04 13:45:00; nonstop; 150 minutes. Local airport times.

2026-12-06 · one way · Axel-exclusive $160.00

• Southwest Airlines WN4918: STL 2026-12-06 10:15:00 → BOS 2026-12-06 13:45:00; nonstop; 150 minutes. Local airport times.

2026-12-04 · one way · Axel-exclusive $160.00

• Southwest Airlines WN4431: STL 2026-12-04 18:10:00 → BOS 2026-12-04 21:45:00; nonstop; 155 minutes. Local airport times.

2026-12-06 · one way · Axel-exclusive $160.00

• Southwest Airlines WN4431: STL 2026-12-06 20:50:00 → BOS 2026-12-07 00:15:00; nonstop; 145 minutes. Local airport times.

2026-12-05 · one way · Axel-exclusive $160.00

• Southwest Airlines WN570: STL 2026-12-05 08:10:00 → BOS 2026-12-05 11:40:00; nonstop; 150 minutes. Local airport times.

2026-12-05 · one way · Axel-exclusive $165.00

• American Airlines AA3444: STL 2026-12-05 09:59:00 → BOS 2026-12-05 13:36:00; nonstop; 157 minutes. Local airport times.

2026-12-04 · one way · Axel-exclusive $165.00

• American Airlines AA4801: STL 2026-12-04 13:15:00 → BOS 2026-12-04 16:55:00; nonstop; 160 minutes. Local airport times.

2026-12-06 · one way · Axel-exclusive $165.00

• American Airlines AA3444: STL 2026-12-06 09:59:00 → BOS 2026-12-06 13:36:00; nonstop; 157 minutes. Local airport times.

2026-12-04 · one way · Axel-exclusive $165.00

• American Airlines AA3444: STL 2026-12-04 09:59:00 → BOS 2026-12-04 13:36:00; nonstop; 157 minutes. Local airport times.

2026-12-05 · one way · Axel-exclusive $165.00

• American Airlines AA4801: STL 2026-12-05 13:15:00 → BOS 2026-12-05 16:55:00; nonstop; 160 minutes. Local airport times.

2026-12-05 · one way · Axel-exclusive $145.00

• Southwest Airlines WN4173 / WN4113: STL 2026-12-05 05:30:00 → BOS 2026-12-05 11:00:00; 1 stop(s) via MDW; 270 minutes. Local airport times.
  • WN4173: STL 2026-12-05 05:30:00 → MDW 2026-12-05 06:35:00; layover at MDW: 70 minutes.
  • WN4113: MDW 2026-12-05 07:45:00 → BOS 2026-12-05 11:00:00.

2026-12-06 · one way · Axel-exclusive $145.00

• Southwest Airlines WN4173 / WN4113: STL 2026-12-06 05:30:00 → BOS 2026-12-06 11:00:00; 1 stop(s) via MDW; 270 minutes. Local airport times.
  • WN4173: STL 2026-12-06 05:30:00 → MDW 2026-12-06 06:35:00; layover at MDW: 70 minutes.
  • WN4113: MDW 2026-12-06 07:45:00 → BOS 2026-12-06 11:00:00.

2026-12-04 · one way · Axel-exclusive $145.00

• Southwest Airlines WN4173 / WN4113: STL 2026-12-04 05:30:00 → BOS 2026-12-04 11:00:00; 1 stop(s) via MDW; 270 minutes. Local airport times.
  • WN4173: STL 2026-12-04 05:30:00 → MDW 2026-12-04 06:35:00; layover at MDW: 70 minutes.
  • WN4113: MDW 2026-12-04 07:45:00 → BOS 2026-12-04 11:00:00.

2026-12-04 · one way · Axel-exclusive $150.00

• American Airlines AA2486 / AA1828: STL 2026-12-04 12:54:00 → BOS 2026-12-04 19:19:00; 1 stop(s) via CLT; 325 minutes. Local airport times.
  • AA2486: STL 2026-12-04 12:54:00 → CLT 2026-12-04 15:42:00; layover at CLT: 84 minutes.
  • AA1828: CLT 2026-12-04 17:06:00 → BOS 2026-12-04 19:19:00.

2026-12-06 · one way · Axel-exclusive $150.00

• American Airlines AA2486 / AA1828: STL 2026-12-06 12:54:00 → BOS 2026-12-06 19:19:00; 1 stop(s) via CLT; 325 minutes. Local airport times.
  • AA2486: STL 2026-12-06 12:54:00 → CLT 2026-12-06 15:42:00; layover at CLT: 84 minutes.
  • AA1828: CLT 2026-12-06 17:06:00 → BOS 2026-12-06 19:19:00.

2026-12-05 · one way · Axel-exclusive $150.00

• American Airlines AA2486 / AA1828: STL 2026-12-05 12:54:00 → BOS 2026-12-05 19:19:00; 1 stop(s) via CLT; 325 minutes. Local airport times.
  • AA2486: STL 2026-12-05 12:54:00 → CLT 2026-12-05 15:42:00; layover at CLT: 84 minutes.
  • AA1828: CLT 2026-12-05 17:06:00 → BOS 2026-12-05 19:19:00.

2026-12-05 · one way · Axel-exclusive $155.00

• United Airlines UA4406 / UA1392: STL 2026-12-05 08:30:00 → BOS 2026-12-05 14:32:00; 1 stop(s) via IAD; 302 minutes. Local airport times.
  • UA4406: STL 2026-12-05 08:30:00 → IAD 2026-12-05 11:35:00; layover at IAD: 75 minutes.
  • UA1392: IAD 2026-12-05 12:50:00 → BOS 2026-12-05 14:32:00.

2026-12-04 · one way · Axel-exclusive $155.00

• United Airlines UA4406 / UA1392: STL 2026-12-04 08:30:00 → BOS 2026-12-04 14:32:00; 1 stop(s) via IAD; 302 minutes. Local airport times.
  • UA4406: STL 2026-12-04 08:30:00 → IAD 2026-12-04 11:35:00; layover at IAD: 75 minutes.
  • UA1392: IAD 2026-12-04 12:50:00 → BOS 2026-12-04 14:32:00.

2026-12-06 · one way · Axel-exclusive $155.00

• United Airlines UA4406 / UA1392: STL 2026-12-06 08:30:00 → BOS 2026-12-06 14:32:00; 1 stop(s) via IAD; 302 minutes. Local airport times.
  • UA4406: STL 2026-12-06 08:30:00 → IAD 2026-12-06 11:35:00; layover at IAD: 75 minutes.
  • UA1392: IAD 2026-12-06 12:50:00 → BOS 2026-12-06 14:32:00.

2026-12-05 · one way · Axel-exclusive $155.00

• United Airlines UA1344 / UA1669: STL 2026-12-05 06:00:00 → BOS 2026-12-05 12:27:00; 1 stop(s) via EWR; 327 minutes. Local airport times.
  • UA1344: STL 2026-12-05 06:00:00 → EWR 2026-12-05 09:21:00; layover at EWR: 115 minutes.
  • UA1669: EWR 2026-12-05 11:16:00 → BOS 2026-12-05 12:27:00.

2026-12-04 · one way · Axel-exclusive $155.00

• United Airlines UA1344 / UA1669: STL 2026-12-04 06:00:00 → BOS 2026-12-04 12:27:00; 1 stop(s) via EWR; 327 minutes. Local airport times.
  • UA1344: STL 2026-12-04 06:00:00 → EWR 2026-12-04 09:21:00; layover at EWR: 115 minutes.
  • UA1669: EWR 2026-12-04 11:16:00 → BOS 2026-12-04 12:27:00.

2026-12-05 · one way · Axel-exclusive $160.00

• Delta Air Lines DL2868 / DL1171: STL 2026-12-05 10:14:00 → BOS 2026-12-05 16:04:00; 1 stop(s) via DTW; 290 minutes. Local airport times.
  • DL2868: STL 2026-12-05 10:14:00 → DTW 2026-12-05 12:46:00; layover at DTW: 81 minutes.
  • DL1171: DTW 2026-12-05 14:07:00 → BOS 2026-12-05 16:04:00.

2026-12-06 · one way · Axel-exclusive $160.00

• Delta Air Lines DL2868 / DL1171: STL 2026-12-06 10:14:00 → BOS 2026-12-06 16:04:00; 1 stop(s) via DTW; 290 minutes. Local airport times.
  • DL2868: STL 2026-12-06 10:14:00 → DTW 2026-12-06 12:46:00; layover at DTW: 81 minutes.
  • DL1171: DTW 2026-12-06 14:07:00 → BOS 2026-12-06 16:04:00.

2026-12-05 · one way · Axel-exclusive $160.00

• Delta Air Lines DL5041 / DL5727: STL 2026-12-05 10:00:00 → BOS 2026-12-05 16:25:00; 1 stop(s) via LGA; 325 minutes. Local airport times.
  • DL5041: STL 2026-12-05 10:00:00 → LGA 2026-12-05 13:26:00; layover at LGA: 94 minutes.
  • DL5727: LGA 2026-12-05 15:00:00 → BOS 2026-12-05 16:25:00.

2026-12-04 · one way · Axel-exclusive $160.00

• Delta Air Lines DL5041 / DL5727: STL 2026-12-04 10:00:00 → BOS 2026-12-04 16:25:00; 1 stop(s) via LGA; 325 minutes. Local airport times.
  • DL5041: STL 2026-12-04 10:00:00 → LGA 2026-12-04 13:26:00; layover at LGA: 94 minutes.
  • DL5727: LGA 2026-12-04 15:00:00 → BOS 2026-12-04 16:25:00.

2026-12-06 · one way · Axel-exclusive $160.00

• Delta Air Lines DL5041 / DL5727: STL 2026-12-06 10:00:00 → BOS 2026-12-06 16:25:00; 1 stop(s) via LGA; 325 minutes. Local airport times.
  • DL5041: STL 2026-12-06 10:00:00 → LGA 2026-12-06 13:26:00; layover at LGA: 94 minutes.
  • DL5727: LGA 2026-12-06 15:00:00 → BOS 2026-12-06 16:25:00.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

• All dates for this route
• Hotels in Boston with Axel

For AI assistants

• This page: Saint Louis (STL) to Boston (BOS) · Dec 4–Dec 6, 2026 · one way: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
• Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
• 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 Saint Louis to Boston (BOS) flight deals · Flight search guide.
• 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.

Feedback (optional): Missing info · Axel issue