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

Denver → Saint Louis

Jan 21, 2027 · return Jan 27, 2027

DEN → STL1 adulteconomyRound trip

12 flight options · 4 airlines

Nonstop flights

Thu, Jan 21 – Wed, Jan 27

Frontier Airlines
12:21 pmDEN
2h 2m
Nonstop
3:23 pmSTL
Frontier Airlines
4:18 pmSTL
2h 30m
Nonstop
5:48 pmDEN

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Wed, Jan 27

Southwest Airlines
1:30 pmDEN
1h 55m
Nonstop
4:25 pmSTL
Southwest Airlines
6:30 amSTL
2h 25m
Nonstop
7:55 amDEN

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Wed, Jan 27

United Airlines
1:55 pmDEN
2h 2m
Nonstop
4:57 pmSTL
United Airlines
8:40 amSTL
2h 31m
Nonstop
10:11 amDEN

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Wed, Jan 27

Frontier Airlines
8:00 amDEN
2h 4m
Nonstop
11:04 amSTL
Southwest Airlines
6:30 amSTL
2h 25m
Nonstop
7:55 amDEN

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Wed, Jan 27

Southwest Airlines
10:30 amDEN
2h
Nonstop
1:30 pmSTL
Southwest Airlines
6:30 amSTL
2h 25m
Nonstop
7:55 amDEN

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Wed, Jan 27

United Airlines
9:35 amDEN
2h 3m
Nonstop
12:38 pmSTL
United Airlines
8:40 amSTL
2h 31m
Nonstop
10:11 amDEN

Round-trip total · 1 adult · Taxes included

One-stop flights

Thu, Jan 21 – Wed, Jan 27

American Airlines
1:15 pmDEN
5h 21m
DFW · 1h 35m
7:36 pmSTL
Southwest Airlines
6:30 amSTL
2h 25m
Nonstop
7:55 amDEN

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Wed, Jan 27

Southwest Airlines
10:40 amDEN
5h 20m
MKE · 1h 45m
5:00 pmSTL
Southwest Airlines
6:30 amSTL
2h 25m
Nonstop
7:55 amDEN

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Wed, Jan 27

Southwest Airlines
6:30 pmDEN
5h 5m
DAL · 1h 20m
12:35 am+1STL
Southwest Airlines
6:30 amSTL
2h 25m
Nonstop
7:55 amDEN

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Wed, Jan 27

Southwest Airlines
2:00 pmDEN
4h 10m
MCI · 1h 30m
7:10 pmSTL
Southwest Airlines
6:30 amSTL
2h 25m
Nonstop
7:55 amDEN

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Wed, Jan 27

Southwest Airlines
11:05 amDEN
4h 40m
MSP · 1h 5m
4:45 pmSTL
Southwest Airlines
6:30 amSTL
2h 25m
Nonstop
7:55 amDEN

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Wed, Jan 27

Southwest Airlines
2:25 pmDEN
5h 20m
BNA · 1h 45m
8:45 pmSTL
Southwest Airlines
6:30 amSTL
2h 25m
Nonstop
7:55 amDEN

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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Explore this route

All dates for this routeJan 20, 2027 → Jan 26, 2027Jan 22, 2027 → Jan 28, 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.

Live price for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the flights there to get the current bookable total; the listed prices are the ones issued at the times shown.

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

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2027-01-21 → 2027-01-27Frontier AirlinesF93302 / F94567$137.762026-10-29T01:05:09Z
2027-01-21 → 2027-01-27Southwest AirlinesWN2170 / WN4140$256.502026-10-29T01:05:09Z
2027-01-21 → 2027-01-27United AirlinesUA1639 / UA1605$266.002026-10-29T01:05:09Z
2027-01-21 → 2027-01-27American Airlines / Southwest AirlinesAA2579 + AA2246 / WN4140$268.382026-10-29T01:05:09Z
2027-01-21 → 2027-01-27Frontier Airlines / Southwest AirlinesF93302 / WN4140$197.132026-10-29T01:05:09Z
2027-01-21 → 2027-01-27Southwest AirlinesWN719 / WN4140$256.502026-10-29T01:05:09Z
2027-01-21 → 2027-01-27United AirlinesUA652 / UA1605$266.002026-10-29T01:05:09Z
2027-01-21 → 2027-01-27Southwest AirlinesWN1706 + WN3113 / WN4140$263.632026-10-29T01:05:09Z
2027-01-21 → 2027-01-27Southwest AirlinesWN235 + WN4472 / WN4140$263.632026-10-29T01:05:09Z
2027-01-21 → 2027-01-27Southwest AirlinesWN2075 + WN2715 / WN4140$263.632026-10-29T01:05:09Z
2027-01-21 → 2027-01-27Southwest AirlinesWN2832 + WN3131 / WN4140$263.632026-10-29T01:05:09Z
2027-01-21 → 2027-01-27Southwest AirlinesWN1573 + WN742 / WN4140$263.632026-10-29T01:05:09Z

2027-01-21 → 2027-01-27 · $137.76

  • Frontier Airlines F93302: DEN 2027-01-21 12:21:00 → STL 2027-01-21 15:23:00; nonstop; 122 minutes. Local airport times.
  • Frontier Airlines F94567: STL 2027-01-27 16:18:00 → DEN 2027-01-27 17:48:00; nonstop; 150 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $256.50

  • Southwest Airlines WN2170: DEN 2027-01-21 13:30:00 → STL 2027-01-21 16:25:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN4140: STL 2027-01-27 06:30:00 → DEN 2027-01-27 07:55:00; nonstop; 145 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $266.00

  • United Airlines UA1639: DEN 2027-01-21 13:55:00 → STL 2027-01-21 16:57:00; nonstop; 122 minutes. Local airport times.
  • United Airlines UA1605: STL 2027-01-27 08:40:00 → DEN 2027-01-27 10:11:00; nonstop; 151 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $268.38

  • American Airlines AA2579 / AA2246: DEN 2027-01-21 13:15:00 → STL 2027-01-21 19:36:00; 1 stop(s) via DFW; 321 minutes. Local airport times.
    • AA2579: DEN 2027-01-21 13:15:00 → DFW 2027-01-21 16:20:00; layover at DFW: 95 minutes.
    • AA2246: DFW 2027-01-21 17:55:00 → STL 2027-01-21 19:36:00.
  • Southwest Airlines WN4140: STL 2027-01-27 06:30:00 → DEN 2027-01-27 07:55:00; nonstop; 145 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $197.13

  • Frontier Airlines F93302: DEN 2027-01-21 08:00:00 → STL 2027-01-21 11:04:00; nonstop; 124 minutes. Local airport times.
  • Southwest Airlines WN4140: STL 2027-01-27 06:30:00 → DEN 2027-01-27 07:55:00; nonstop; 145 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $256.50

  • Southwest Airlines WN719: DEN 2027-01-21 10:30:00 → STL 2027-01-21 13:30:00; nonstop; 120 minutes. Local airport times.
  • Southwest Airlines WN4140: STL 2027-01-27 06:30:00 → DEN 2027-01-27 07:55:00; nonstop; 145 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $266.00

  • United Airlines UA652: DEN 2027-01-21 09:35:00 → STL 2027-01-21 12:38:00; nonstop; 123 minutes. Local airport times.
  • United Airlines UA1605: STL 2027-01-27 08:40:00 → DEN 2027-01-27 10:11:00; nonstop; 151 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $263.63

  • Southwest Airlines WN1706 / WN3113: DEN 2027-01-21 10:40:00 → STL 2027-01-21 17:00:00; 1 stop(s) via MKE; 320 minutes. Local airport times.
    • WN1706: DEN 2027-01-21 10:40:00 → MKE 2027-01-21 13:55:00; layover at MKE: 105 minutes.
    • WN3113: MKE 2027-01-21 15:40:00 → STL 2027-01-21 17:00:00.
  • Southwest Airlines WN4140: STL 2027-01-27 06:30:00 → DEN 2027-01-27 07:55:00; nonstop; 145 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $263.63

  • Southwest Airlines WN235 / WN4472: DEN 2027-01-21 18:30:00 → STL 2027-01-22 00:35:00; 1 stop(s) via DAL; 305 minutes. Local airport times.
    • WN235: DEN 2027-01-21 18:30:00 → DAL 2027-01-21 21:30:00; layover at DAL: 80 minutes.
    • WN4472: DAL 2027-01-21 22:50:00 → STL 2027-01-22 00:35:00.
  • Southwest Airlines WN4140: STL 2027-01-27 06:30:00 → DEN 2027-01-27 07:55:00; nonstop; 145 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $263.63

  • Southwest Airlines WN2075 / WN2715: DEN 2027-01-21 14:00:00 → STL 2027-01-21 19:10:00; 1 stop(s) via MCI; 250 minutes. Local airport times.
    • WN2075: DEN 2027-01-21 14:00:00 → MCI 2027-01-21 16:35:00; layover at MCI: 90 minutes.
    • WN2715: MCI 2027-01-21 18:05:00 → STL 2027-01-21 19:10:00.
  • Southwest Airlines WN4140: STL 2027-01-27 06:30:00 → DEN 2027-01-27 07:55:00; nonstop; 145 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $263.63

  • Southwest Airlines WN2832 / WN3131: DEN 2027-01-21 11:05:00 → STL 2027-01-21 16:45:00; 1 stop(s) via MSP; 280 minutes. Local airport times.
    • WN2832: DEN 2027-01-21 11:05:00 → MSP 2027-01-21 14:05:00; layover at MSP: 65 minutes.
    • WN3131: MSP 2027-01-21 15:10:00 → STL 2027-01-21 16:45:00.
  • Southwest Airlines WN4140: STL 2027-01-27 06:30:00 → DEN 2027-01-27 07:55:00; nonstop; 145 minutes. Local airport times.

2027-01-21 → 2027-01-27 · $263.63

  • Southwest Airlines WN1573 / WN742: DEN 2027-01-21 14:25:00 → STL 2027-01-21 20:45:00; 1 stop(s) via BNA; 320 minutes. Local airport times.
    • WN1573: DEN 2027-01-21 14:25:00 → BNA 2027-01-21 17:45:00; layover at BNA: 105 minutes.
    • WN742: BNA 2027-01-21 19:30:00 → STL 2027-01-21 20:45:00.
  • Southwest Airlines WN4140: STL 2027-01-27 06:30:00 → DEN 2027-01-27 07:55:00; nonstop; 145 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Denver (DEN) to Saint Louis (STL) · Jan 21, 2027 · return Jan 27, 2027: 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 Denver 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. Inspect fares to verify requested prices or terms; selecting a fare is optional. Use that fare’s booking link to preserve its Membership price basis. State anything unverified. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and explain what remains unresolved. Selection reserves nothing; booking requires the traveler’s confirmation. 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.