Boston (BOS) to Saint Louis (STL), Jan 26, 2027: round trips from $219, one way from $90

Boston (BOS) to Saint Louis (STL), Jan 26, 2027: round trips from $219, one way from $90 on Axel, checked Oct 29, 2026. Lowest published fares: $219 round trip, Axel-exclusive, Frontier Airlines / Southwest Airlines, 1 stop, Jan 26–27, 2027; $90 one way, Axel-exclusive, Frontier Airlines, 1 stop, Jan 26, 2027; 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.

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.

Hotels in St. Louis for these trips

Hotels: under a trip, hotels in St. Louis for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

• Hotels in St. Louis for these nights (Jan 26–27, 2027 · 1 night · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $66 total · 4★ The Westin St. Louis, $115 total · 5★ Four Seasons Hotel St Louis, $288 total
• Hotels in St. Louis for these nights (Jan 26–28, 2027 · 2 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $140 total · 4★ The Westin St. Louis, $237 total · 5★ Four Seasons Hotel St Louis, $576 total
• Hotels in St. Louis for these nights (Jan 26–29, 2027 · 3 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $214 total · 4★ The Westin St. Louis, $343 total · 5★ Four Seasons Hotel St Louis, $864 total
• Hotels in St. Louis for these nights (Jan 26–30, 2027 · 4 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $298 total · 4★ The Westin St. Louis, $473 total · 5★ Four Seasons Hotel St Louis, $1,150 total
• Hotels in St. Louis for these nights (Jan 26–31, 2027 · 5 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $372 total · 4★ The Westin St. Louis, $600 total · 5★ Four Seasons Hotel St Louis, $1,438 total
• Hotels in St. Louis for these nights (Jan 26 – Feb 1, 2027 · 6 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $446 total · 4★ The Westin St. Louis, $704 total · 5★ Four Seasons Hotel St Louis, $1,726 total
• Hotels in St. Louis for these nights (Jan 26 – Feb 2, 2027 · 7 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $520 total · 4★ The Westin St. Louis, $818 total · 5★ Four Seasons Hotel St Louis, $2,014 total
• Hotels in St. Louis for these nights (Jan 26 – Feb 3, 2027 · 8 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $577 total · 4★ The Westin St. Louis, $940 total · 5★ Four Seasons Hotel St Louis, $2,302 total
• Hotels in St. Louis for these nights (Jan 26 – Feb 4, 2027 · 9 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $642 total · 4★ The Westin St. Louis, $1,085 total · 5★ Four Seasons Hotel St Louis, $2,590 total
• Hotels in St. Louis for these nights (Jan 26 – Feb 5, 2027 · 10 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $707 total · 4★ The Westin St. Louis, $1,199 total · 5★ Four Seasons Hotel St Louis, $2,878 total
• Hotels in St. Louis for these nights (Jan 26 – Feb 6, 2027 · 11 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $782 total · 4★ The Westin St. Louis, $1,354 total · 5★ Four Seasons Hotel St Louis, $3,166 total
• Hotels in St. Louis for these nights (Jan 26 – Feb 7, 2027 · 12 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $857 total · 4★ The Westin St. Louis, $1,529 total · 5★ Four Seasons Hotel St Louis, $3,457 total
• Hotels in St. Louis for these nights (Jan 26 – Feb 8, 2027 · 13 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $922 total · 4★ The Westin St. Louis, $1,633 total · 5★ Four Seasons Hotel St Louis, $3,748 total
• Hotels in St. Louis for these nights (Jan 26 – Feb 9, 2027 · 14 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $987 total · 4★ The Westin St. Louis, $1,752 total · 5★ Four Seasons Hotel St Louis, $4,039 total

All hotels in St. Louis

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

2027-01-26 · one way · Axel-exclusive $90.25

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.

2027-01-26 · one way · Axel-exclusive $142.50

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.

2027-01-26 → 2027-01-27 · Axel-exclusive $218.50

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• Southwest Airlines WN4431: STL 2027-01-27 18:10:00 → BOS 2027-01-27 21:45:00; nonstop; 155 minutes. Local airport times.

2027-01-26 → 2027-01-27 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-01-27 18:10:00 → BOS 2027-01-27 21:45:00; nonstop; 155 minutes. Local airport times.

2027-01-26 → 2027-01-28 · Axel-exclusive $223.25

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• American Airlines AA3444: STL 2027-01-28 09:59:00 → BOS 2027-01-28 13:36:00; nonstop; 157 minutes. Local airport times.

2027-01-26 → 2027-01-28 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-01-28 18:10:00 → BOS 2027-01-28 21:45:00; nonstop; 155 minutes. Local airport times.

2027-01-26 → 2027-01-29 · Axel-exclusive $218.50

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• Southwest Airlines WN4431: STL 2027-01-29 19:55:00 → BOS 2027-01-29 23:25:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-01-29 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-01-29 19:55:00 → BOS 2027-01-29 23:25:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-01-30 · Axel-exclusive $218.50

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• Southwest Airlines WN570: STL 2027-01-30 08:10:00 → BOS 2027-01-30 11:40:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-01-30 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN570: STL 2027-01-30 08:10:00 → BOS 2027-01-30 11:40:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-02-01 · Axel-exclusive $218.50

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• Southwest Airlines WN4918: STL 2027-02-01 10:15:00 → BOS 2027-02-01 13:45:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-02-01 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN4918: STL 2027-02-01 10:15:00 → BOS 2027-02-01 13:45:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $223.25

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• American Airlines AA3444: STL 2027-02-02 09:59:00 → BOS 2027-02-02 13:36:00; nonstop; 157 minutes. Local airport times.

2027-01-26 → 2027-02-02 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN3667: STL 2027-02-02 13:20:00 → BOS 2027-02-02 16:50:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-02-03 · Axel-exclusive $218.50

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• Southwest Airlines WN4431: STL 2027-02-03 18:10:00 → BOS 2027-02-03 21:45:00; nonstop; 155 minutes. Local airport times.

2027-01-26 → 2027-02-03 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-02-03 18:10:00 → BOS 2027-02-03 21:45:00; nonstop; 155 minutes. Local airport times.

2027-01-26 → 2027-02-05 · Axel-exclusive $218.50

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• Southwest Airlines WN4431: STL 2027-02-05 19:55:00 → BOS 2027-02-05 23:25:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-02-05 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-02-05 19:55:00 → BOS 2027-02-05 23:25:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-02-06 · Axel-exclusive $218.50

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• Southwest Airlines WN570: STL 2027-02-06 08:10:00 → BOS 2027-02-06 11:40:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-02-06 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN570: STL 2027-02-06 08:10:00 → BOS 2027-02-06 11:40:00; nonstop; 150 minutes. Local airport times.

2027-01-26 → 2027-02-07 · Axel-exclusive $218.50

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• Southwest Airlines WN4431: STL 2027-02-07 20:50:00 → BOS 2027-02-08 00:15:00; nonstop; 145 minutes. Local airport times.

2027-01-26 → 2027-02-07 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN4431: STL 2027-02-07 20:50:00 → BOS 2027-02-08 00:15:00; nonstop; 145 minutes. Local airport times.

2027-01-26 → 2027-02-09 · Axel-exclusive $223.25

• Frontier Airlines F93511 / F94473: BOS 2027-01-26 12:15:00 → STL 2027-01-26 17:42:00; 1 stop(s) via ATL; 387 minutes. Local airport times.
  • F93511: BOS 2027-01-26 12:15:00 → ATL 2027-01-26 15:36:00; layover at ATL: 73 minutes.
  • F94473: ATL 2027-01-26 16:49:00 → STL 2027-01-26 17:42:00.
• American Airlines AA3444: STL 2027-02-09 09:59:00 → BOS 2027-02-09 13:36:00; nonstop; 157 minutes. Local airport times.

2027-01-26 → 2027-02-09 · Axel-exclusive $266.00

• Southwest Airlines WN4929: BOS 2027-01-26 17:05:00 → STL 2027-01-26 19:15:00; nonstop; 190 minutes. Local airport times.
• Southwest Airlines WN3667: STL 2027-02-09 13:20:00 → BOS 2027-02-09 16:50:00; nonstop; 150 minutes. Local airport times.

Explore this route

• All dates for this route
• Jan 25, 2027 · Return options
• Jan 27, 2027 · Return options
• Hotels in St. Louis with Axel

For AI assistants

• This page: Boston (BOS) to Saint Louis (STL) · Jan 26, 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. Under a trip, hotels in St. Louis for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
• Next: each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: Choose travelers and dates prices the requested 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 Boston to Saint Louis (STL) 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.

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