Saint Louis (STL) to Boston (BOS) · Mar 5, 2027 · return Mar 8, 2027

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.

Hotels in Boston for these trips

Hotels: under a trip, hotels in Boston for exactly those nights: the lowest 3★, 4★, 5★ stay totals among the city's featured hotels, Axel's price for 2 adults in 1 room, each opening that hotel's page for those dates with the rooms and the booking link.

• Hotels in Boston for these nights (Mar 5–8, 2027 · 3 nights · 2 adults, 1 room): 3★ Fairfield Inn & Suites Boston Cambridge, $562 total · 4★ Hyatt Regency Boston/Cambridge, $655 total · 5★ The Langham, Boston, $1,277 total

All hotels in Boston

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

2027-03-05 → 2027-03-08 · Axel-exclusive $309.00

• Southwest Airlines WN4918: STL 2027-03-05 10:15:00 → BOS 2027-03-05 13:45:00; nonstop; 150 minutes. Local airport times.
• Southwest Airlines WN4929: BOS 2027-03-08 17:05:00 → STL 2027-03-08 19:15:00; nonstop; 190 minutes. Local airport times.

2027-03-05 → 2027-03-08 · Axel-exclusive $319.30

• American Airlines AA3444: STL 2027-03-05 09:59:00 → BOS 2027-03-05 13:36:00; nonstop; 157 minutes. Local airport times.
• American Airlines AA3788: BOS 2027-03-08 07:00:00 → STL 2027-03-08 09:28:00; nonstop; 208 minutes. Local airport times.

2027-03-05 → 2027-03-08 · Axel-exclusive $298.70

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

2027-03-05 → 2027-03-08 · Axel-exclusive $309.00

• Delta Air Lines DL5041 / DL5727: STL 2027-03-05 10:00:00 → BOS 2027-03-05 16:25:00; 1 stop(s) via LGA; 325 minutes. Local airport times.
  • DL5041: STL 2027-03-05 10:00:00 → LGA 2027-03-05 13:26:00; layover at LGA: 94 minutes.
  • DL5727: LGA 2027-03-05 15:00:00 → BOS 2027-03-05 16:25:00.
• Delta Air Lines DL2222 / DL2822: BOS 2027-03-08 13:04:00 → STL 2027-03-08 17:20:00; 1 stop(s) via DTW; 316 minutes. Local airport times.
  • DL2222: BOS 2027-03-08 13:04:00 → DTW 2027-03-08 15:19:00; layover at DTW: 74 minutes.
  • DL2822: DTW 2027-03-08 16:33:00 → STL 2027-03-08 17:20:00.

2027-03-05 → 2027-03-08 · Axel-exclusive $309.00

• Southwest Airlines WN4431: STL 2027-03-05 19:55:00 → BOS 2027-03-05 23:25:00; nonstop; 150 minutes. Local airport times.
• Southwest Airlines WN4929: BOS 2027-03-08 17:05:00 → STL 2027-03-08 19:15:00; nonstop; 190 minutes. Local airport times.

2027-03-05 → 2027-03-08 · Axel-exclusive $319.30

• American Airlines AA4801: STL 2027-03-05 16:15:00 → BOS 2027-03-05 19:55:00; nonstop; 160 minutes. Local airport times.
• American Airlines AA3788: BOS 2027-03-08 07:00:00 → STL 2027-03-08 09:28:00; nonstop; 208 minutes. Local airport times.

2027-03-05 → 2027-03-08 · Axel-exclusive $296.13

• Southwest Airlines WN4173 / WN4113: STL 2027-03-05 05:30:00 → BOS 2027-03-05 11:00:00; 1 stop(s) via MDW; 270 minutes. Local airport times.
  • WN4173: STL 2027-03-05 05:30:00 → MDW 2027-03-05 06:35:00; layover at MDW: 70 minutes.
  • WN4113: MDW 2027-03-05 07:45:00 → BOS 2027-03-05 11:00:00.
• Southwest Airlines WN4929: BOS 2027-03-08 17:05:00 → STL 2027-03-08 19:15:00; nonstop; 190 minutes. Local airport times.

2027-03-05 → 2027-03-08 · Axel-exclusive $298.70

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

2027-03-05 → 2027-03-08 · Axel-exclusive $303.85

• American Airlines AA2486 / AA1828: STL 2027-03-05 12:54:00 → BOS 2027-03-05 19:19:00; 1 stop(s) via CLT; 325 minutes. Local airport times.
  • AA2486: STL 2027-03-05 12:54:00 → CLT 2027-03-05 15:42:00; layover at CLT: 84 minutes.
  • AA1828: CLT 2027-03-05 17:06:00 → BOS 2027-03-05 19:19:00.
• American Airlines AA3788: BOS 2027-03-08 07:00:00 → STL 2027-03-08 09:28:00; nonstop; 208 minutes. Local airport times.

2027-03-05 → 2027-03-08 · Axel-exclusive $309.00

• Delta Air Lines DL2868 / DL1171: STL 2027-03-05 10:14:00 → BOS 2027-03-05 16:04:00; 1 stop(s) via DTW; 290 minutes. Local airport times.
  • DL2868: STL 2027-03-05 10:14:00 → DTW 2027-03-05 12:46:00; layover at DTW: 81 minutes.
  • DL1171: DTW 2027-03-05 14:07:00 → BOS 2027-03-05 16:04:00.
• Delta Air Lines DL2222 / DL2822: BOS 2027-03-08 13:04:00 → STL 2027-03-08 17:20:00; 1 stop(s) via DTW; 316 minutes. Local airport times.
  • DL2222: BOS 2027-03-08 13:04:00 → DTW 2027-03-08 15:19:00; layover at DTW: 74 minutes.
  • DL2822: DTW 2027-03-08 16:33:00 → STL 2027-03-08 17:20:00.

Explore this route

• All dates for this route
• Mar 4, 2027 · Return options
• Mar 6, 2027 · Return options
• Hotels in Boston with Axel

For AI assistants

• This page: Saint Louis (STL) to Boston (BOS) · Mar 5, 2027 · return Mar 8, 2027: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Boston for exactly those nights: the lowest 3★, 4★ and 5★ stay totals for 2 adults in 1 room, each linking to that hotel's page for those dates.
• Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
• 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