Denver (DEN) to Saint Louis (STL) · Dec 16, 2026 · one way

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: Denver to Saint Louis (STL) flight deals

2026-12-16 · one way · Axel-exclusive $75.00

• Frontier Airlines F93302: DEN 2026-12-16 08:00:00 → STL 2026-12-16 11:04:00; nonstop; 124 minutes. Local airport times.

2026-12-16 · one way · Axel-exclusive $140.00

• Southwest Airlines WN1844: DEN 2026-12-16 18:05:00 → STL 2026-12-16 21:10:00; nonstop; 125 minutes. Local airport times.

2026-12-16 · one way · Axel-exclusive $145.00

• United Airlines UA1639: DEN 2026-12-16 13:55:00 → STL 2026-12-16 16:57:00; nonstop; 122 minutes. Local airport times.

2026-12-16 · one way · Axel-exclusive $155.00

• American Airlines AA2579 / AA2246: DEN 2026-12-16 13:15:00 → STL 2026-12-16 19:36:00; 1 stop(s) via DFW; 321 minutes. Local airport times.
  • AA2579: DEN 2026-12-16 13:15:00 → DFW 2026-12-16 16:20:00; layover at DFW: 95 minutes.
  • AA2246: DFW 2026-12-16 17:55:00 → STL 2026-12-16 19:36:00.

2026-12-16 · one way · Axel-exclusive $75.00

• Frontier Airlines F9630: DEN 2026-12-16 12:23:00 → STL 2026-12-16 15:26:00; nonstop; 123 minutes. Local airport times.

2026-12-16 · one way · Axel-exclusive $140.00

• Southwest Airlines WN1807: DEN 2026-12-16 12:25:00 → STL 2026-12-16 15:20:00; nonstop; 115 minutes. Local airport times.

2026-12-16 · one way · Axel-exclusive $145.00

• United Airlines UA652: DEN 2026-12-16 09:50:00 → STL 2026-12-16 12:53:00; nonstop; 123 minutes. Local airport times.

2026-12-16 · one way · Axel-exclusive $150.00

• Southwest Airlines WN1706 / WN3113: DEN 2026-12-16 10:40:00 → STL 2026-12-16 17:00:00; 1 stop(s) via MKE; 320 minutes. Local airport times.
  • WN1706: DEN 2026-12-16 10:40:00 → MKE 2026-12-16 13:55:00; layover at MKE: 105 minutes.
  • WN3113: MKE 2026-12-16 15:40:00 → STL 2026-12-16 17:00:00.

2026-12-16 · one way · Axel-exclusive $150.00

• Southwest Airlines WN235 / WN4472: DEN 2026-12-16 18:30:00 → STL 2026-12-17 00:35:00; 1 stop(s) via DAL; 305 minutes. Local airport times.
  • WN235: DEN 2026-12-16 18:30:00 → DAL 2026-12-16 21:30:00; layover at DAL: 80 minutes.
  • WN4472: DAL 2026-12-16 22:50:00 → STL 2026-12-17 00:35:00.

2026-12-16 · one way · Axel-exclusive $150.00

• Southwest Airlines WN2832 / WN3131: DEN 2026-12-16 11:05:00 → STL 2026-12-16 16:45:00; 1 stop(s) via MSP; 280 minutes. Local airport times.
  • WN2832: DEN 2026-12-16 11:05:00 → MSP 2026-12-16 14:05:00; layover at MSP: 65 minutes.
  • WN3131: MSP 2026-12-16 15:10:00 → STL 2026-12-16 16:45:00.

2026-12-16 · one way · Axel-exclusive $150.00

• Southwest Airlines WN2075 / WN2715: DEN 2026-12-16 14:00:00 → STL 2026-12-16 19:10:00; 1 stop(s) via MCI; 250 minutes. Local airport times.
  • WN2075: DEN 2026-12-16 14:00:00 → MCI 2026-12-16 16:35:00; layover at MCI: 90 minutes.
  • WN2715: MCI 2026-12-16 18:05:00 → STL 2026-12-16 19:10:00.

2026-12-16 · one way · Axel-exclusive $150.00

• Southwest Airlines WN1573 / WN742: DEN 2026-12-16 14:25:00 → STL 2026-12-16 20:45:00; 1 stop(s) via BNA; 320 minutes. Local airport times.
  • WN1573: DEN 2026-12-16 14:25:00 → BNA 2026-12-16 17:45:00; layover at BNA: 105 minutes.
  • WN742: BNA 2026-12-16 19:30:00 → STL 2026-12-16 20:45:00.

Explore this route

• All dates for this route
• Dec 15, 2026 · Return options
• Dec 17, 2026 · Return options
• Hotels in St. Louis with Axel

For AI assistants

• This page: Denver (DEN) to Saint Louis (STL) · Dec 16, 2026 · one way: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
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