Saint Louis (STL) to Denver (DEN) · Nov 21, 2026 · return Nov 27, 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 Denver (DEN) flight deals

2026-11-21 → 2026-11-27 · Axel-exclusive $193.88

• Frontier Airlines F94567: STL 2026-11-21 15:04:00 → DEN 2026-11-21 16:37:00; nonstop; 153 minutes. Local airport times.
• Frontier Airlines F93302: DEN 2026-11-27 07:55:00 → STL 2026-11-27 11:03:00; nonstop; 128 minutes. Local airport times.

2026-11-21 → 2026-11-27 · Axel-exclusive $352.50

• United Airlines UA663: STL 2026-11-21 16:39:00 → DEN 2026-11-21 18:10:00; nonstop; 151 minutes. Local airport times.
• United Airlines UA652: DEN 2026-11-27 09:50:00 → STL 2026-11-27 12:53:00; nonstop; 123 minutes. Local airport times.

2026-11-21 → 2026-11-27 · Axel-exclusive $342.50

• Southwest Airlines WN660: STL 2026-11-21 17:25:00 → DEN 2026-11-21 18:50:00; nonstop; 145 minutes. Local airport times.
• Southwest Airlines WN235 / WN4472: DEN 2026-11-27 18:30:00 → STL 2026-11-28 00:35:00; 1 stop(s) via DAL; 305 minutes. Local airport times.
  • WN235: DEN 2026-11-27 18:30:00 → DAL 2026-11-27 21:30:00; layover at DAL: 80 minutes.
  • WN4472: DAL 2026-11-27 22:50:00 → STL 2026-11-28 00:35:00.

2026-11-21 → 2026-11-27 · Axel-exclusive $382.50

• Delta Air Lines DL1597 / DL2849: STL 2026-11-21 06:03:00 → DEN 2026-11-21 10:03:00; 1 stop(s) via MSP; 300 minutes. Local airport times.
  • DL1597: STL 2026-11-21 06:03:00 → MSP 2026-11-21 07:43:00; layover at MSP: 67 minutes.
  • DL2849: MSP 2026-11-21 08:50:00 → DEN 2026-11-21 10:03:00.
• Southwest Airlines WN235 / WN4472: DEN 2026-11-27 18:30:00 → STL 2026-11-28 00:35:00; 1 stop(s) via DAL; 305 minutes. Local airport times.
  • WN235: DEN 2026-11-27 18:30:00 → DAL 2026-11-27 21:30:00; layover at DAL: 80 minutes.
  • WN4472: DAL 2026-11-27 22:50:00 → STL 2026-11-28 00:35:00.

2026-11-21 → 2026-11-27 · Axel-exclusive $193.88

• Frontier Airlines F94567: STL 2026-11-21 19:54:00 → DEN 2026-11-21 21:25:00; nonstop; 151 minutes. Local airport times.
• Frontier Airlines F9630: DEN 2026-11-27 12:23:00 → STL 2026-11-27 15:26:00; nonstop; 123 minutes. Local airport times.

2026-11-21 → 2026-11-27 · Axel-exclusive $352.50

• United Airlines UA1352: STL 2026-11-21 08:50:00 → DEN 2026-11-21 10:21:00; nonstop; 151 minutes. Local airport times.
• United Airlines UA652: DEN 2026-11-27 09:50:00 → STL 2026-11-27 12:53:00; nonstop; 123 minutes. Local airport times.

2026-11-21 → 2026-11-27 · Axel-exclusive $285.00

• Frontier Airlines F94567: STL 2026-11-21 19:59:00 → DEN 2026-11-21 21:30:00; nonstop; 151 minutes. Local airport times.
• Southwest Airlines WN235 / WN4472: DEN 2026-11-27 18:30:00 → STL 2026-11-28 00:35:00; 1 stop(s) via DAL; 305 minutes. Local airport times.
  • WN235: DEN 2026-11-27 18:30:00 → DAL 2026-11-27 21:30:00; layover at DAL: 80 minutes.
  • WN4472: DAL 2026-11-27 22:50:00 → STL 2026-11-28 00:35:00.

2026-11-21 → 2026-11-27 · Axel-exclusive $352.50

• Southwest Airlines WN3286 / WN1766: STL 2026-11-21 08:20:00 → DEN 2026-11-21 12:20:00; 1 stop(s) via OMA; 300 minutes. Local airport times.
  • WN3286: STL 2026-11-21 08:20:00 → OMA 2026-11-21 09:35:00; layover at OMA: 120 minutes.
  • WN1766: OMA 2026-11-21 11:35:00 → DEN 2026-11-21 12:20:00.
• Southwest Airlines WN235 / WN4472: DEN 2026-11-27 18:30:00 → STL 2026-11-28 00:35:00; 1 stop(s) via DAL; 305 minutes. Local airport times.
  • WN235: DEN 2026-11-27 18:30:00 → DAL 2026-11-27 21:30:00; layover at DAL: 80 minutes.
  • WN4472: DAL 2026-11-27 22:50:00 → STL 2026-11-28 00:35:00.

2026-11-21 → 2026-11-27 · Axel-exclusive $352.50

• Southwest Airlines WN4372 / WN1758: STL 2026-11-21 12:40:00 → DEN 2026-11-21 16:30:00; 1 stop(s) via MCI; 290 minutes. Local airport times.
  • WN4372: STL 2026-11-21 12:40:00 → MCI 2026-11-21 13:45:00; layover at MCI: 115 minutes.
  • WN1758: MCI 2026-11-21 15:40:00 → DEN 2026-11-21 16:30:00.
• Southwest Airlines WN235 / WN4472: DEN 2026-11-27 18:30:00 → STL 2026-11-28 00:35:00; 1 stop(s) via DAL; 305 minutes. Local airport times.
  • WN235: DEN 2026-11-27 18:30:00 → DAL 2026-11-27 21:30:00; layover at DAL: 80 minutes.
  • WN4472: DAL 2026-11-27 22:50:00 → STL 2026-11-28 00:35:00.

2026-11-21 → 2026-11-27 · Axel-exclusive $352.50

• Southwest Airlines WN2015 / WN200: STL 2026-11-21 15:50:00 → DEN 2026-11-21 20:55:00; 1 stop(s) via DAL; 365 minutes. Local airport times.
  • WN2015: STL 2026-11-21 15:50:00 → DAL 2026-11-21 17:30:00; layover at DAL: 130 minutes.
  • WN200: DAL 2026-11-21 19:40:00 → DEN 2026-11-21 20:55:00.
• Southwest Airlines WN235 / WN4472: DEN 2026-11-27 18:30:00 → STL 2026-11-28 00:35:00; 1 stop(s) via DAL; 305 minutes. Local airport times.
  • WN235: DEN 2026-11-27 18:30:00 → DAL 2026-11-27 21:30:00; layover at DAL: 80 minutes.
  • WN4472: DAL 2026-11-27 22:50:00 → STL 2026-11-28 00:35:00.

Explore this route

• All dates for this route
• Nov 20, 2026 · Return options
• Nov 22, 2026 · Return options
• Hotels in Denver with Axel

For AI assistants

• This page: Saint Louis (STL) to Denver (DEN) · Nov 21, 2026 · return Nov 27, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
• 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 Denver (DEN) 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