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Denver → Saint Louis

Aug 21, 2027 · return Aug 28, 2027

DEN → STL1 adulteconomyRound trip

12 flight options · 4 airlines

Nonstop flights

Sat, Aug 21 – Sat, Aug 28

Frontier Airlines
12:23 pmDEN
2h 3m
Nonstop
3:26 pmSTL
Frontier Airlines
7:59 pmSTL
2h 31m
Nonstop
9:30 pmDEN

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Sat, Aug 28

Southwest Airlines
10:30 amDEN
2h
Nonstop
1:30 pmSTL
Southwest Airlines
12:55 pmSTL
2h 20m
Nonstop
2:15 pmDEN

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Sat, Aug 28

United Airlines
9:35 amDEN
2h 3m
Nonstop
12:38 pmSTL
United Airlines
4:39 pmSTL
2h 31m
Nonstop
6:10 pmDEN

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Sat, Aug 28

Frontier Airlines
7:55 amDEN
2h 8m
Nonstop
11:03 amSTL
Frontier Airlines
7:59 pmSTL
2h 31m
Nonstop
9:30 pmDEN

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Sat, Aug 28

Southwest Airlines
9:55 pmDEN
2h
Nonstop
12:55 am+1STL
Southwest Airlines
12:55 pmSTL
2h 20m
Nonstop
2:15 pmDEN

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Sat, Aug 28

United Airlines
1:55 pmDEN
2h 2m
Nonstop
4:57 pmSTL
United Airlines
4:39 pmSTL
2h 31m
Nonstop
6:10 pmDEN

Round-trip total · 1 adult · Taxes included

One-stop flights

Sat, Aug 21 – Sat, Aug 28

American Airlines
1:15 pmDEN
5h 21m
DFW · 1h 35m
7:36 pmSTL
Southwest Airlines
12:55 pmSTL
2h 20m
Nonstop
2:15 pmDEN

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Sat, Aug 28

Southwest Airlines
6:30 pmDEN
5h 5m
DAL · 1h 20m
12:35 am+1STL
Southwest Airlines
12:55 pmSTL
2h 20m
Nonstop
2:15 pmDEN

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Sat, Aug 28

Southwest Airlines
11:05 amDEN
4h 40m
MSP · 1h 5m
4:45 pmSTL
Southwest Airlines
12:55 pmSTL
2h 20m
Nonstop
2:15 pmDEN

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Sat, Aug 28

Southwest Airlines
10:40 amDEN
5h 20m
MKE · 1h 45m
5:00 pmSTL
Southwest Airlines
12:55 pmSTL
2h 20m
Nonstop
2:15 pmDEN

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Sat, Aug 28

Southwest Airlines
2:25 pmDEN
5h 20m
BNA · 1h 45m
8:45 pmSTL
Southwest Airlines
12:55 pmSTL
2h 20m
Nonstop
2:15 pmDEN

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Sat, Aug 28

Southwest Airlines
2:00 pmDEN
4h 10m
MCI · 1h 30m
7:10 pmSTL
Southwest Airlines
12:55 pmSTL
2h 20m
Nonstop
2:15 pmDEN

Round-trip total · 1 adult · Taxes included

Make this trip yours

DEN ⇄ STL

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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More dates

All dates for this routeNov 5, 2026 → Nov 8, 2026Nov 14, 2026 → Nov 21, 2026Nov 24, 2026 → Nov 29, 2026Dec 5, 2026 → Dec 12, 2026Dec 17, 2026 → Dec 20, 2026Dec 26, 2026 → Jan 2, 2027Jan 5, 2027 · One wayJan 16, 2027 → Jan 23, 2027Feb 5, 2027 → Feb 8, 2027Apr 3, 2027 → Apr 10, 2027Jun 26, 2027 → Jul 3, 2027Sep 17, 2027 → Sep 20, 2027
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2027-08-21 → 2027-08-28Frontier AirlinesF9630 / F94567$185.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28Southwest AirlinesWN719 / WN1508$325.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28United AirlinesUA652 / UA663$335.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28American Airlines / Southwest AirlinesAA2579 + AA2246 / WN1508$335.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28Frontier AirlinesF93302 / F94567$185.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28Southwest AirlinesWN1845 / WN1508$325.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28United AirlinesUA1639 / UA663$335.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28Southwest AirlinesWN235 + WN4472 / WN1508$330.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28Southwest AirlinesWN2832 + WN3131 / WN1508$330.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28Southwest AirlinesWN1706 + WN3113 / WN1508$330.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28Southwest AirlinesWN1573 + WN742 / WN1508$330.002026-10-29T01:05:09Z
2027-08-21 → 2027-08-28Southwest AirlinesWN2075 + WN2715 / WN1508$330.002026-10-29T01:05:09Z

2027-08-21 → 2027-08-28 · $185.00

  • Frontier Airlines F9630: DEN 2027-08-21 12:23:00 → STL 2027-08-21 15:26:00; nonstop; 123 minutes. Local airport times.
  • Frontier Airlines F94567: STL 2027-08-28 19:59:00 → DEN 2027-08-28 21:30:00; nonstop; 151 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $325.00

  • Southwest Airlines WN719: DEN 2027-08-21 10:30:00 → STL 2027-08-21 13:30:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1508: STL 2027-08-28 12:55:00 → DEN 2027-08-28 14:15:00; nonstop; 140 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $335.00

  • United Airlines UA652: DEN 2027-08-21 09:35:00 → STL 2027-08-21 12:38:00; nonstop; 123 minutes. Local airport times.
  • United Airlines UA663: STL 2027-08-28 16:39:00 → DEN 2027-08-28 18:10:00; nonstop; 151 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $335.00

  • American Airlines AA2579 / AA2246: DEN 2027-08-21 13:15:00 → STL 2027-08-21 19:36:00; 1 stop(s) via DFW; 321 minutes. Local airport times.
    • AA2579: DEN 2027-08-21 13:15:00 → DFW 2027-08-21 16:20:00; layover at DFW: 95 minutes.
    • AA2246: DFW 2027-08-21 17:55:00 → STL 2027-08-21 19:36:00.
  • Southwest Airlines WN1508: STL 2027-08-28 12:55:00 → DEN 2027-08-28 14:15:00; nonstop; 140 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $185.00

  • Frontier Airlines F93302: DEN 2027-08-21 07:55:00 → STL 2027-08-21 11:03:00; nonstop; 128 minutes. Local airport times.
  • Frontier Airlines F94567: STL 2027-08-28 19:59:00 → DEN 2027-08-28 21:30:00; nonstop; 151 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $325.00

  • Southwest Airlines WN1845: DEN 2027-08-21 21:55:00 → STL 2027-08-22 00:55:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN1508: STL 2027-08-28 12:55:00 → DEN 2027-08-28 14:15:00; nonstop; 140 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $335.00

  • United Airlines UA1639: DEN 2027-08-21 13:55:00 → STL 2027-08-21 16:57:00; nonstop; 122 minutes. Local airport times.
  • United Airlines UA663: STL 2027-08-28 16:39:00 → DEN 2027-08-28 18:10:00; nonstop; 151 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $330.00

  • Southwest Airlines WN235 / WN4472: DEN 2027-08-21 18:30:00 → STL 2027-08-22 00:35:00; 1 stop(s) via DAL; 305 minutes. Local airport times.
    • WN235: DEN 2027-08-21 18:30:00 → DAL 2027-08-21 21:30:00; layover at DAL: 80 minutes.
    • WN4472: DAL 2027-08-21 22:50:00 → STL 2027-08-22 00:35:00.
  • Southwest Airlines WN1508: STL 2027-08-28 12:55:00 → DEN 2027-08-28 14:15:00; nonstop; 140 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $330.00

  • Southwest Airlines WN2832 / WN3131: DEN 2027-08-21 11:05:00 → STL 2027-08-21 16:45:00; 1 stop(s) via MSP; 280 minutes. Local airport times.
    • WN2832: DEN 2027-08-21 11:05:00 → MSP 2027-08-21 14:05:00; layover at MSP: 65 minutes.
    • WN3131: MSP 2027-08-21 15:10:00 → STL 2027-08-21 16:45:00.
  • Southwest Airlines WN1508: STL 2027-08-28 12:55:00 → DEN 2027-08-28 14:15:00; nonstop; 140 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $330.00

  • Southwest Airlines WN1706 / WN3113: DEN 2027-08-21 10:40:00 → STL 2027-08-21 17:00:00; 1 stop(s) via MKE; 320 minutes. Local airport times.
    • WN1706: DEN 2027-08-21 10:40:00 → MKE 2027-08-21 13:55:00; layover at MKE: 105 minutes.
    • WN3113: MKE 2027-08-21 15:40:00 → STL 2027-08-21 17:00:00.
  • Southwest Airlines WN1508: STL 2027-08-28 12:55:00 → DEN 2027-08-28 14:15:00; nonstop; 140 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $330.00

  • Southwest Airlines WN1573 / WN742: DEN 2027-08-21 14:25:00 → STL 2027-08-21 20:45:00; 1 stop(s) via BNA; 320 minutes. Local airport times.
    • WN1573: DEN 2027-08-21 14:25:00 → BNA 2027-08-21 17:45:00; layover at BNA: 105 minutes.
    • WN742: BNA 2027-08-21 19:30:00 → STL 2027-08-21 20:45:00.
  • Southwest Airlines WN1508: STL 2027-08-28 12:55:00 → DEN 2027-08-28 14:15:00; nonstop; 140 minutes. Local airport times.

2027-08-21 → 2027-08-28 · $330.00

  • Southwest Airlines WN2075 / WN2715: DEN 2027-08-21 14:00:00 → STL 2027-08-21 19:10:00; 1 stop(s) via MCI; 250 minutes. Local airport times.
    • WN2075: DEN 2027-08-21 14:00:00 → MCI 2027-08-21 16:35:00; layover at MCI: 90 minutes.
    • WN2715: MCI 2027-08-21 18:05:00 → STL 2027-08-21 19:10:00.
  • Southwest Airlines WN1508: STL 2027-08-28 12:55:00 → DEN 2027-08-28 14:15:00; nonstop; 140 minutes. Local airport times.

More dates for this route