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Route overview: Los Angeles to Denver (DEN) flight deals

Ontario → Denver

Feb 5, 2027 · return Feb 8, 2027

ONT → DEN1 adulteconomyRound trip

11 flight options · 4 airlines

Nonstop flights

Fri, Feb 5 – Mon, Feb 8

Frontier Airlines
6:30 amONT
2h 21m
Nonstop
9:51 amDEN
Frontier Airlines
10:48 pmDEN
2h 25m
Nonstop
12:13 am+1ONT

Round-trip total · 1 adult · Taxes included

Fri, Feb 5 – Mon, Feb 8

Southwest Airlines
1:55 pmONT
2h 10m
Nonstop
5:05 pmDEN
Southwest Airlines
9:00 pmDEN
2h 30m
Nonstop
10:30 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Feb 5 – Mon, Feb 8

United Airlines
1:40 pmONT
2h 15m
Nonstop
4:55 pmDEN
United Airlines
11:15 amDEN
2h 18m
Nonstop
12:33 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Feb 5 – Mon, Feb 8

Southwest Airlines
8:45 amONT
2h 10m
Nonstop
11:55 amDEN
Southwest Airlines
9:00 pmDEN
2h 30m
Nonstop
10:30 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Feb 5 – Mon, Feb 8

United Airlines
5:00 amONT
2h 17m
Nonstop
8:17 amDEN
United Airlines
11:15 amDEN
2h 18m
Nonstop
12:33 pmONT

Round-trip total · 1 adult · Taxes included

One-stop flights

Fri, Feb 5 – Mon, Feb 8

American Airlines
9:50 amONT
4h 24m
PHX · 1h 1m
3:14 pmDEN
American Airlines
12:06 pmDEN
5h 14m
PHX · 1h 53m
4:20 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Feb 5 – Mon, Feb 8

Frontier Airlines
8:44 amONT
5h
LAS · 1h 56m
2:44 pmDEN
Frontier Airlines
10:48 pmDEN
2h 25m
Nonstop
12:13 am+1ONT

Round-trip total · 1 adult · Taxes included

Fri, Feb 5 – Mon, Feb 8

Southwest Airlines
5:00 pmONT
5h 35m
LAS · 2h 35m
11:35 pmDEN
Southwest Airlines
9:00 pmDEN
2h 30m
Nonstop
10:30 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Feb 5 – Mon, Feb 8

Southwest Airlines
1:30 pmONT
5h 40m
SMF · 1h 55m
8:10 pmDEN
Southwest Airlines
9:00 pmDEN
2h 30m
Nonstop
10:30 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Feb 5 – Mon, Feb 8

Southwest Airlines
2:00 pmONT
4h 5m
PHX · 1h
7:05 pmDEN
Southwest Airlines
9:00 pmDEN
2h 30m
Nonstop
10:30 pmONT

Round-trip total · 1 adult · Taxes included

Fri, Feb 5 – Mon, Feb 8

United Airlines
6:00 amONT
5h 9m
SFO · 1h
12:09 pmDEN
United Airlines
11:15 amDEN
2h 18m
Nonstop
12:33 pmONT

Round-trip total · 1 adult · Taxes included

Make this trip yours

ONT ⇄ DEN

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 routeFeb 4, 2027 → Feb 7, 2027Feb 6, 2027 → Feb 9, 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: Los Angeles to Denver (DEN) flight deals

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2027-02-05 → 2027-02-08Frontier AirlinesF91500 / F91261$120.002026-10-29T01:52:26Z
2027-02-05 → 2027-02-08Southwest AirlinesWN1383 / WN2827$270.002026-10-29T01:52:26Z
2027-02-05 → 2027-02-08United AirlinesUA1263 / UA430$280.002026-10-29T01:52:26Z
2027-02-05 → 2027-02-08American AirlinesAA1423 + AA3376 / AA2447 + AA4144$330.002026-10-29T01:52:26Z
2027-02-05 → 2027-02-08Southwest AirlinesWN3301 / WN2827$270.002026-10-29T01:52:26Z
2027-02-05 → 2027-02-08United AirlinesUA2446 / UA430$280.002026-10-29T01:52:26Z
2027-02-05 → 2027-02-08Frontier AirlinesF92232 + F91766 / F91261$150.002026-10-29T01:52:26Z
2027-02-05 → 2027-02-08Southwest AirlinesWN1053 + WN1053 / WN2827$285.002026-10-29T01:52:26Z
2027-02-05 → 2027-02-08Southwest AirlinesWN3326 + WN1102 / WN2827$285.002026-10-29T01:52:26Z
2027-02-05 → 2027-02-08Southwest AirlinesWN1533 + WN284 / WN2827$285.002026-10-29T01:52:26Z
2027-02-05 → 2027-02-08United AirlinesUA2363 + UA1068 / UA430$305.002026-10-29T01:52:26Z

2027-02-05 → 2027-02-08 · $120.00

  • Frontier Airlines F91500: ONT 2027-02-05 06:30:00 → DEN 2027-02-05 09:51:00; nonstop; 141 minutes. Local airport times.
  • Frontier Airlines F91261: DEN 2027-02-08 22:48:00 → ONT 2027-02-09 00:13:00; nonstop; 145 minutes. Local airport times.

2027-02-05 → 2027-02-08 · $270.00

  • Southwest Airlines WN1383: ONT 2027-02-05 13:55:00 → DEN 2027-02-05 17:05:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN2827: DEN 2027-02-08 21:00:00 → ONT 2027-02-08 22:30:00; nonstop; 150 minutes. Local airport times.

2027-02-05 → 2027-02-08 · $280.00

  • United Airlines UA1263: ONT 2027-02-05 13:40:00 → DEN 2027-02-05 16:55:00; nonstop; 135 minutes. Local airport times.
  • United Airlines UA430: DEN 2027-02-08 11:15:00 → ONT 2027-02-08 12:33:00; nonstop; 138 minutes. Local airport times.

2027-02-05 → 2027-02-08 · $330.00

  • American Airlines AA1423 / AA3376: ONT 2027-02-05 09:50:00 → DEN 2027-02-05 15:14:00; 1 stop(s) via PHX; 264 minutes. Local airport times.
    • AA1423: ONT 2027-02-05 09:50:00 → PHX 2027-02-05 12:15:00; layover at PHX: 61 minutes.
    • AA3376: PHX 2027-02-05 13:16:00 → DEN 2027-02-05 15:14:00.
  • American Airlines AA2447 / AA4144: DEN 2027-02-08 12:06:00 → ONT 2027-02-08 16:20:00; 1 stop(s) via PHX; 314 minutes. Local airport times.
    • AA2447: DEN 2027-02-08 12:06:00 → PHX 2027-02-08 14:03:00; layover at PHX: 113 minutes.
    • AA4144: PHX 2027-02-08 15:56:00 → ONT 2027-02-08 16:20:00.

2027-02-05 → 2027-02-08 · $270.00

  • Southwest Airlines WN3301: ONT 2027-02-05 08:45:00 → DEN 2027-02-05 11:55:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN2827: DEN 2027-02-08 21:00:00 → ONT 2027-02-08 22:30:00; nonstop; 150 minutes. Local airport times.

2027-02-05 → 2027-02-08 · $280.00

  • United Airlines UA2446: ONT 2027-02-05 05:00:00 → DEN 2027-02-05 08:17:00; nonstop; 137 minutes. Local airport times.
  • United Airlines UA430: DEN 2027-02-08 11:15:00 → ONT 2027-02-08 12:33:00; nonstop; 138 minutes. Local airport times.

2027-02-05 → 2027-02-08 · $150.00

  • Frontier Airlines F92232 / F91766: ONT 2027-02-05 08:44:00 → DEN 2027-02-05 14:44:00; 1 stop(s) via LAS; 300 minutes. Local airport times.
    • F92232: ONT 2027-02-05 08:44:00 → LAS 2027-02-05 09:50:00; layover at LAS: 116 minutes.
    • F91766: LAS 2027-02-05 11:46:00 → DEN 2027-02-05 14:44:00.
  • Frontier Airlines F91261: DEN 2027-02-08 22:48:00 → ONT 2027-02-09 00:13:00; nonstop; 145 minutes. Local airport times.

2027-02-05 → 2027-02-08 · $285.00

  • Southwest Airlines WN1053 / WN1053: ONT 2027-02-05 17:00:00 → DEN 2027-02-05 23:35:00; 1 stop(s) via LAS; 335 minutes. Local airport times.
    • WN1053: ONT 2027-02-05 17:00:00 → LAS 2027-02-05 18:05:00; layover at LAS: 155 minutes.
    • WN1053: LAS 2027-02-05 20:40:00 → DEN 2027-02-05 23:35:00.
  • Southwest Airlines WN2827: DEN 2027-02-08 21:00:00 → ONT 2027-02-08 22:30:00; nonstop; 150 minutes. Local airport times.

2027-02-05 → 2027-02-08 · $285.00

  • Southwest Airlines WN3326 / WN1102: ONT 2027-02-05 13:30:00 → DEN 2027-02-05 20:10:00; 1 stop(s) via SMF; 340 minutes. Local airport times.
    • WN3326: ONT 2027-02-05 13:30:00 → SMF 2027-02-05 14:55:00; layover at SMF: 115 minutes.
    • WN1102: SMF 2027-02-05 16:50:00 → DEN 2027-02-05 20:10:00.
  • Southwest Airlines WN2827: DEN 2027-02-08 21:00:00 → ONT 2027-02-08 22:30:00; nonstop; 150 minutes. Local airport times.

2027-02-05 → 2027-02-08 · $285.00

  • Southwest Airlines WN1533 / WN284: ONT 2027-02-05 14:00:00 → DEN 2027-02-05 19:05:00; 1 stop(s) via PHX; 245 minutes. Local airport times.
    • WN1533: ONT 2027-02-05 14:00:00 → PHX 2027-02-05 16:15:00; layover at PHX: 60 minutes.
    • WN284: PHX 2027-02-05 17:15:00 → DEN 2027-02-05 19:05:00.
  • Southwest Airlines WN2827: DEN 2027-02-08 21:00:00 → ONT 2027-02-08 22:30:00; nonstop; 150 minutes. Local airport times.

2027-02-05 → 2027-02-08 · $305.00

  • United Airlines UA2363 / UA1068: ONT 2027-02-05 06:00:00 → DEN 2027-02-05 12:09:00; 1 stop(s) via SFO; 309 minutes. Local airport times.
    • UA2363: ONT 2027-02-05 06:00:00 → SFO 2027-02-05 07:30:00; layover at SFO: 60 minutes.
    • UA1068: SFO 2027-02-05 08:30:00 → DEN 2027-02-05 12:09:00.
  • United Airlines UA430: DEN 2027-02-08 11:15:00 → ONT 2027-02-08 12:33:00; nonstop; 138 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Ontario (ONT) to Denver (DEN) · Feb 5, 2027 · return Feb 8, 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 Los Angeles 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. 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.