San Juan (SJU) to Saint Louis (STL), Dec 21, 2026 – Jan 3, 2027: from $539 round trip

San Juan (SJU) to Saint Louis (STL), Dec 21, 2026 – Jan 3, 2027: from $539 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $539 round trip, Axel-exclusive, Southwest Airlines, 1 stop, Dec 21, 2026 – Jan 3, 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.

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 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 (Dec 21 – Jan 3, 2027 · 13 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $919 total · 4★ The Westin St. Louis, $1,604 total · 5★ Four Seasons Hotel St Louis, $5,181 total

All hotels in St. Louis

Route overview: San Juan to Saint Louis (STL) flight deals

2026-12-21 → 2027-01-03 · Axel-exclusive $539.00

• Southwest Airlines WN3881 / WN2339: SJU 2026-12-21 15:30:00 → STL 2026-12-21 22:00:00; 1 stop(s) via MDW; 510 minutes. Local airport times.
  • WN3881: SJU 2026-12-21 15:30:00 → MDW 2026-12-21 18:40:00; layover at MDW: 125 minutes.
  • WN2339: MDW 2026-12-21 20:45:00 → STL 2026-12-21 22:00:00.
• Southwest Airlines WN4205 / WN3430: STL 2027-01-03 15:55:00 → SJU 2027-01-04 00:55:00; 1 stop(s) via TPA; 420 minutes. Local airport times.
  • WN4205: STL 2027-01-03 15:55:00 → TPA 2027-01-03 19:10:00; layover at TPA: 110 minutes.
  • WN3430: TPA 2027-01-03 21:00:00 → SJU 2027-01-04 00:55:00.

2026-12-21 → 2027-01-03 · Axel-exclusive $588.00

• American Airlines AA3324 / AA2486: SJU 2026-12-21 07:05:00 → STL 2026-12-21 13:20:00; 1 stop(s) via CLT; 495 minutes. Local airport times.
  • AA3324: SJU 2026-12-21 07:05:00 → CLT 2026-12-21 10:05:00; layover at CLT: 135 minutes.
  • AA2486: CLT 2026-12-21 12:20:00 → STL 2026-12-21 13:20:00.
• American Airlines AA2486 / AA2098: STL 2027-01-03 11:09:00 → SJU 2027-01-03 21:13:00; 1 stop(s) via CLT; 484 minutes. Local airport times.
  • AA2486: STL 2027-01-03 11:09:00 → CLT 2027-01-03 14:00:00; layover at CLT: 155 minutes.
  • AA2098: CLT 2027-01-03 16:35:00 → SJU 2027-01-03 21:13:00.

2026-12-21 → 2027-01-03 · Axel-exclusive $630.00

• Delta Air Lines DL1925 / DL1609: SJU 2026-12-21 15:40:00 → STL 2026-12-21 23:26:00; 1 stop(s) via MSP; 586 minutes. Local airport times.
  • DL1925: SJU 2026-12-21 15:40:00 → MSP 2026-12-21 19:40:00; layover at MSP: 129 minutes.
  • DL1609: MSP 2026-12-21 21:49:00 → STL 2026-12-21 23:26:00.
• Delta Air Lines DL1102 / DL1861: STL 2027-01-03 14:31:00 → SJU 2027-01-03 23:10:00; 1 stop(s) via ATL; 399 minutes. Local airport times.
  • DL1102: STL 2027-01-03 14:31:00 → ATL 2027-01-03 17:05:00; layover at ATL: 100 minutes.
  • DL1861: ATL 2027-01-03 18:45:00 → SJU 2027-01-03 23:10:00.

2026-12-21 → 2027-01-03 · Axel-exclusive $539.00

• Southwest Airlines WN3946 / WN1965: SJU 2026-12-21 14:25:00 → STL 2026-12-21 21:55:00; 1 stop(s) via FLL; 570 minutes. Local airport times.
  • WN3946: SJU 2026-12-21 14:25:00 → FLL 2026-12-21 16:20:00; layover at FLL: 215 minutes.
  • WN1965: FLL 2026-12-21 19:55:00 → STL 2026-12-21 21:55:00.
• Southwest Airlines WN4205 / WN3430: STL 2027-01-03 15:55:00 → SJU 2027-01-04 00:55:00; 1 stop(s) via TPA; 420 minutes. Local airport times.
  • WN4205: STL 2027-01-03 15:55:00 → TPA 2027-01-03 19:10:00; layover at TPA: 110 minutes.
  • WN3430: TPA 2027-01-03 21:00:00 → SJU 2027-01-04 00:55:00.

2026-12-21 → 2027-01-03 · Axel-exclusive $539.00

• Southwest Airlines WN3950 / WN2874: SJU 2026-12-21 13:20:00 → STL 2026-12-21 21:05:00; 1 stop(s) via MCO; 585 minutes. Local airport times.
  • WN3950: SJU 2026-12-21 13:20:00 → MCO 2026-12-21 15:35:00; layover at MCO: 230 minutes.
  • WN2874: MCO 2026-12-21 19:25:00 → STL 2026-12-21 21:05:00.
• Southwest Airlines WN4205 / WN3430: STL 2027-01-03 15:55:00 → SJU 2027-01-04 00:55:00; 1 stop(s) via TPA; 420 minutes. Local airport times.
  • WN4205: STL 2027-01-03 15:55:00 → TPA 2027-01-03 19:10:00; layover at TPA: 110 minutes.
  • WN3430: TPA 2027-01-03 21:00:00 → SJU 2027-01-04 00:55:00.

2026-12-21 → 2027-01-03 · Axel-exclusive $577.50

• Southwest Airlines WN2750: SJU 2026-12-21 17:00:00 → STL 2026-12-21 20:00:00; nonstop; 300 minutes. Local airport times.
• Southwest Airlines WN4205 / WN3430: STL 2027-01-03 15:55:00 → SJU 2027-01-04 00:55:00; 1 stop(s) via TPA; 420 minutes. Local airport times.
  • WN4205: STL 2027-01-03 15:55:00 → TPA 2027-01-03 19:10:00; layover at TPA: 110 minutes.
  • WN3430: TPA 2027-01-03 21:00:00 → SJU 2027-01-04 00:55:00.

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
• Dec 20, 2026 · Return options
• Dec 22, 2026 · Return options
• Hotels in St. Louis with Axel

For AI assistants

• This page: San Juan (SJU) to Saint Louis (STL) · Dec 21, 2026 · return Jan 3, 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 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 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.
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