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

Ontario (ONT) to Denver (DEN), Nov 12–15, 2026: from $120 round trip

Ontario (ONT) to Denver (DEN), Nov 12–15, 2026: from $120 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $120 round trip, Axel-exclusive, Frontier Airlines, nonstop, Nov 12–15, 2026, 1 adult, economy, checked Oct 29, 2026.

ONT → DEN1 adulteconomyRound trip

11 flight options · 4 airlines

Nonstop flights

Thu, Nov 12 – Sun, Nov 15

Frontier Airlines
11:32 amONT
2h 25m
Nonstop
2:57 pmDEN
Frontier Airlines
9:20 amDEN
2h 25m
Nonstop
10:45 amONT

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 12 – Sun, Nov 15

Southwest Airlines
6:20 amONT
2h 15m
Nonstop
9:35 amDEN
Southwest Airlines
8:30 amDEN
2h 25m
Nonstop
9:55 amONT

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 12 – Sun, Nov 15

United Airlines
5:00 amONT
2h 17m
Nonstop
8:17 amDEN
United Airlines
11:16 amDEN
2h 26m
Nonstop
12:42 pmONT

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 12 – Sun, Nov 15

Southwest Airlines
1:55 pmONT
2h 10m
Nonstop
5:05 pmDEN
Southwest Airlines
8:30 amDEN
2h 25m
Nonstop
9:55 amONT

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 12 – Sun, Nov 15

United Airlines
1:29 pmONT
2h 16m
Nonstop
4:45 pmDEN
United Airlines
11:16 amDEN
2h 26m
Nonstop
12:42 pmONT

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Thu, Nov 12 – Sun, Nov 15

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

Availability is checked when you select these flights.

Thu, Nov 12 – Sun, Nov 15

Frontier Airlines
8:44 amONT
5h
LAS · 1h 56m
2:44 pmDEN
Frontier Airlines
9:20 amDEN
2h 25m
Nonstop
10:45 amONT

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 12 – Sun, Nov 15

Southwest Airlines
2:00 pmONT
4h 5m
PHX · 1h
7:05 pmDEN
Southwest Airlines
8:30 amDEN
2h 25m
Nonstop
9:55 amONT

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 12 – Sun, Nov 15

Southwest Airlines
1:30 pmONT
5h 40m
SMF · 1h 55m
8:10 pmDEN
Southwest Airlines
8:30 amDEN
2h 25m
Nonstop
9:55 amONT

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 12 – Sun, Nov 15

Southwest Airlines
5:00 pmONT
5h 35m
LAS · 2h 35m
11:35 pmDEN
Southwest Airlines
8:30 amDEN
2h 25m
Nonstop
9:55 amONT

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 12 – Sun, Nov 15

United Airlines
6:00 amONT
5h 9m
SFO · 1h
12:09 pmDEN
United Airlines
11:16 amDEN
2h 26m
Nonstop
12:42 pmONT

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Hotels for these nights (Nov 12–15, 2026 · 3 nights · 2 adults, 1 room): 3★ Residence Inn Denver Cherry Creek · 4★ Limelight Hotel Denver · 5★ Four Seasons Denver Hotel

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 routeNov 11, 2026 · Return optionsNov 13, 2026 · Return optionsHotels in Denver with Axel
For AI assistants: every fare, every link, instructions

Ontario (ONT) to Denver (DEN), Nov 12–15, 2026: from $120 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $120 round trip, Axel-exclusive, Frontier Airlines, nonstop, Nov 12–15, 2026, 1 adult, economy, checked Oct 29, 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.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2026-11-12 → 2026-11-15Frontier AirlinesF92908 / F9290711:32:00→14:57:00 2h 25m nonstop · 09:20:00→10:45:00 2h 25m nonstopAxel-exclusive $120.002026-10-29T01:52:26Z
2026-11-12 → 2026-11-15Southwest AirlinesWN3300 / WN226306:20:00→09:35:00 2h 15m nonstop · 08:30:00→09:55:00 2h 25m nonstopAxel-exclusive $270.002026-10-29T01:52:26Z
2026-11-12 → 2026-11-15United AirlinesUA2446 / UA43005:00:00→08:17:00 2h 17m nonstop · 11:16:00→12:42:00 2h 26m nonstopAxel-exclusive $280.002026-10-29T01:52:26Z
2026-11-12 → 2026-11-15American AirlinesAA1423 + AA3376 / AA2447 + AA414409:50:00→15:14:00 4h 24m 1 stop via PHX · 12:06:00→16:20:00 5h 14m 1 stop via PHXAxel-exclusive $330.002026-10-29T01:52:26Z
2026-11-12 → 2026-11-15Southwest AirlinesWN1383 / WN226313:55:00→17:05:00 2h 10m nonstop · 08:30:00→09:55:00 2h 25m nonstopAxel-exclusive $270.002026-10-29T01:52:26Z
2026-11-12 → 2026-11-15United AirlinesUA1263 / UA43013:29:00→16:45:00 2h 16m nonstop · 11:16:00→12:42:00 2h 26m nonstopAxel-exclusive $280.002026-10-29T01:52:26Z
2026-11-12 → 2026-11-15Frontier AirlinesF92232 + F91766 / F9290708:44:00→14:44:00 5h 00m 1 stop via LAS · 09:20:00→10:45:00 2h 25m nonstopAxel-exclusive $150.002026-10-29T01:52:26Z
2026-11-12 → 2026-11-15Southwest AirlinesWN1533 + WN284 / WN226314:00:00→19:05:00 4h 05m 1 stop via PHX · 08:30:00→09:55:00 2h 25m nonstopAxel-exclusive $285.002026-10-29T01:52:26Z
2026-11-12 → 2026-11-15Southwest AirlinesWN3326 + WN1102 / WN226313:30:00→20:10:00 5h 40m 1 stop via SMF · 08:30:00→09:55:00 2h 25m nonstopAxel-exclusive $285.002026-10-29T01:52:26Z
2026-11-12 → 2026-11-15Southwest AirlinesWN1053 + WN1053 / WN226317:00:00→23:35:00 5h 35m 1 stop via LAS · 08:30:00→09:55:00 2h 25m nonstopAxel-exclusive $285.002026-10-29T01:52:26Z
2026-11-12 → 2026-11-15United AirlinesUA2363 + UA1068 / UA43006:00:00→12:09:00 5h 09m 1 stop via SFO · 11:16:00→12:42:00 2h 26m nonstopAxel-exclusive $305.002026-10-29T01:52:26Z

Hotels in Denver for these trips

Hotels: under a trip, hotels in Denver for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

All hotels in Denver

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

2026-11-12 → 2026-11-15 · Axel-exclusive $120.00

  • Frontier Airlines F92908: ONT 2026-11-12 11:32:00 → DEN 2026-11-12 14:57:00; nonstop; 145 minutes. Local airport times.
  • Frontier Airlines F92907: DEN 2026-11-15 09:20:00 → ONT 2026-11-15 10:45:00; nonstop; 145 minutes. Local airport times.

2026-11-12 → 2026-11-15 · Axel-exclusive $270.00

  • Southwest Airlines WN3300: ONT 2026-11-12 06:20:00 → DEN 2026-11-12 09:35:00; nonstop; 135 minutes. Local airport times.
  • Southwest Airlines WN2263: DEN 2026-11-15 08:30:00 → ONT 2026-11-15 09:55:00; nonstop; 145 minutes. Local airport times.

2026-11-12 → 2026-11-15 · Axel-exclusive $280.00

  • United Airlines UA2446: ONT 2026-11-12 05:00:00 → DEN 2026-11-12 08:17:00; nonstop; 137 minutes. Local airport times.
  • United Airlines UA430: DEN 2026-11-15 11:16:00 → ONT 2026-11-15 12:42:00; nonstop; 146 minutes. Local airport times.

2026-11-12 → 2026-11-15 · Axel-exclusive $330.00

  • American Airlines AA1423 / AA3376: ONT 2026-11-12 09:50:00 → DEN 2026-11-12 15:14:00; 1 stop(s) via PHX; 264 minutes. Local airport times.
    • AA1423: ONT 2026-11-12 09:50:00 → PHX 2026-11-12 12:15:00; layover at PHX: 61 minutes.
    • AA3376: PHX 2026-11-12 13:16:00 → DEN 2026-11-12 15:14:00.
  • American Airlines AA2447 / AA4144: DEN 2026-11-15 12:06:00 → ONT 2026-11-15 16:20:00; 1 stop(s) via PHX; 314 minutes. Local airport times.
    • AA2447: DEN 2026-11-15 12:06:00 → PHX 2026-11-15 14:03:00; layover at PHX: 113 minutes.
    • AA4144: PHX 2026-11-15 15:56:00 → ONT 2026-11-15 16:20:00.

2026-11-12 → 2026-11-15 · Axel-exclusive $270.00

  • Southwest Airlines WN1383: ONT 2026-11-12 13:55:00 → DEN 2026-11-12 17:05:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN2263: DEN 2026-11-15 08:30:00 → ONT 2026-11-15 09:55:00; nonstop; 145 minutes. Local airport times.

2026-11-12 → 2026-11-15 · Axel-exclusive $280.00

  • United Airlines UA1263: ONT 2026-11-12 13:29:00 → DEN 2026-11-12 16:45:00; nonstop; 136 minutes. Local airport times.
  • United Airlines UA430: DEN 2026-11-15 11:16:00 → ONT 2026-11-15 12:42:00; nonstop; 146 minutes. Local airport times.

2026-11-12 → 2026-11-15 · Axel-exclusive $150.00

  • Frontier Airlines F92232 / F91766: ONT 2026-11-12 08:44:00 → DEN 2026-11-12 14:44:00; 1 stop(s) via LAS; 300 minutes. Local airport times.
    • F92232: ONT 2026-11-12 08:44:00 → LAS 2026-11-12 09:50:00; layover at LAS: 116 minutes.
    • F91766: LAS 2026-11-12 11:46:00 → DEN 2026-11-12 14:44:00.
  • Frontier Airlines F92907: DEN 2026-11-15 09:20:00 → ONT 2026-11-15 10:45:00; nonstop; 145 minutes. Local airport times.

2026-11-12 → 2026-11-15 · Axel-exclusive $285.00

  • Southwest Airlines WN1533 / WN284: ONT 2026-11-12 14:00:00 → DEN 2026-11-12 19:05:00; 1 stop(s) via PHX; 245 minutes. Local airport times.
    • WN1533: ONT 2026-11-12 14:00:00 → PHX 2026-11-12 16:15:00; layover at PHX: 60 minutes.
    • WN284: PHX 2026-11-12 17:15:00 → DEN 2026-11-12 19:05:00.
  • Southwest Airlines WN2263: DEN 2026-11-15 08:30:00 → ONT 2026-11-15 09:55:00; nonstop; 145 minutes. Local airport times.

2026-11-12 → 2026-11-15 · Axel-exclusive $285.00

  • Southwest Airlines WN3326 / WN1102: ONT 2026-11-12 13:30:00 → DEN 2026-11-12 20:10:00; 1 stop(s) via SMF; 340 minutes. Local airport times.
    • WN3326: ONT 2026-11-12 13:30:00 → SMF 2026-11-12 14:55:00; layover at SMF: 115 minutes.
    • WN1102: SMF 2026-11-12 16:50:00 → DEN 2026-11-12 20:10:00.
  • Southwest Airlines WN2263: DEN 2026-11-15 08:30:00 → ONT 2026-11-15 09:55:00; nonstop; 145 minutes. Local airport times.

2026-11-12 → 2026-11-15 · Axel-exclusive $285.00

  • Southwest Airlines WN1053 / WN1053: ONT 2026-11-12 17:00:00 → DEN 2026-11-12 23:35:00; 1 stop(s) via LAS; 335 minutes. Local airport times.
    • WN1053: ONT 2026-11-12 17:00:00 → LAS 2026-11-12 18:05:00; layover at LAS: 155 minutes.
    • WN1053: LAS 2026-11-12 20:40:00 → DEN 2026-11-12 23:35:00.
  • Southwest Airlines WN2263: DEN 2026-11-15 08:30:00 → ONT 2026-11-15 09:55:00; nonstop; 145 minutes. Local airport times.

2026-11-12 → 2026-11-15 · Axel-exclusive $305.00

  • United Airlines UA2363 / UA1068: ONT 2026-11-12 06:00:00 → DEN 2026-11-12 12:09:00; 1 stop(s) via SFO; 309 minutes. Local airport times.
    • UA2363: ONT 2026-11-12 06:00:00 → SFO 2026-11-12 07:30:00; layover at SFO: 60 minutes.
    • UA1068: SFO 2026-11-12 08:30:00 → DEN 2026-11-12 12:09:00.
  • United Airlines UA430: DEN 2026-11-15 11:16:00 → ONT 2026-11-15 12:42:00; nonstop; 146 minutes. Local airport times.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

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For AI assistants

  • This page: Ontario (ONT) to Denver (DEN) · Nov 12, 2026 · return Nov 15, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Denver for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
  • Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
  • 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. 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.