Denver (DEN) to Ontario (ONT) · Aug 27, 2027 · return Sep 10, 2027

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 Ontario (ONT) flight deals

2027-08-27 → 2027-09-10 · Axel-exclusive $205.00

• Frontier Airlines F92907: DEN 2027-08-27 09:20:00 → ONT 2027-08-27 10:45:00; nonstop; 145 minutes. Local airport times.
• Frontier Airlines F92908: ONT 2027-09-10 11:16:00 → DEN 2027-09-10 14:41:00; nonstop; 145 minutes. Local airport times.

2027-08-27 → 2027-09-10 · Axel-exclusive $320.00

• Southwest Airlines WN2827: DEN 2027-08-27 21:00:00 → ONT 2027-08-27 22:30:00; nonstop; 150 minutes. Local airport times.
• Southwest Airlines WN2316: ONT 2027-09-10 14:35:00 → DEN 2027-09-10 17:55:00; nonstop; 140 minutes. Local airport times.

2027-08-27 → 2027-09-10 · Axel-exclusive $335.00

• United Airlines UA1542: DEN 2027-08-27 19:45:00 → ONT 2027-08-27 21:11:00; nonstop; 146 minutes. Local airport times.
• United Airlines UA2446: ONT 2027-09-10 05:00:00 → DEN 2027-09-10 08:21:00; nonstop; 141 minutes. Local airport times.

2027-08-27 → 2027-09-10 · Axel-exclusive $295.00

• Delta Air Lines DL1553 / DL3879: DEN 2027-08-27 12:29:00 → ONT 2027-08-27 16:22:00; 1 stop(s) via SLC; 293 minutes. Local airport times.
  • DL1553: DEN 2027-08-27 12:29:00 → SLC 2027-08-27 14:06:00; layover at SLC: 83 minutes.
  • DL3879: SLC 2027-08-27 15:29:00 → ONT 2027-08-27 16:22:00.
• Frontier Airlines F92908: ONT 2027-09-10 11:16:00 → DEN 2027-09-10 14:41:00; nonstop; 145 minutes. Local airport times.

2027-08-27 → 2027-09-10 · Axel-exclusive $365.00

• American Airlines AA2447 / AA4144: DEN 2027-08-27 12:06:00 → ONT 2027-08-27 16:20:00; 1 stop(s) via PHX; 314 minutes. Local airport times.
  • AA2447: DEN 2027-08-27 12:06:00 → PHX 2027-08-27 13:03:00; layover at PHX: 113 minutes.
  • AA4144: PHX 2027-08-27 14:56:00 → ONT 2027-08-27 16:20:00.
• American Airlines AA1423 / AA3376: ONT 2027-09-10 09:50:00 → DEN 2027-09-10 15:14:00; 1 stop(s) via PHX; 264 minutes. Local airport times.
  • AA1423: ONT 2027-09-10 09:50:00 → PHX 2027-09-10 11:15:00; layover at PHX: 61 minutes.
  • AA3376: PHX 2027-09-10 12:16:00 → DEN 2027-09-10 15:14:00.

2027-08-27 → 2027-09-10 · Axel-exclusive $205.00

• Frontier Airlines F91261: DEN 2027-08-27 22:48:00 → ONT 2027-08-28 00:13:00; nonstop; 145 minutes. Local airport times.
• Frontier Airlines F92908: ONT 2027-09-10 11:16:00 → DEN 2027-09-10 14:41:00; nonstop; 145 minutes. Local airport times.

2027-08-27 → 2027-09-10 · Axel-exclusive $320.00

• Southwest Airlines WN2484: DEN 2027-08-27 13:15:00 → ONT 2027-08-27 14:40:00; nonstop; 145 minutes. Local airport times.
• Southwest Airlines WN2316: ONT 2027-09-10 14:35:00 → DEN 2027-09-10 17:55:00; nonstop; 140 minutes. Local airport times.

2027-08-27 → 2027-09-10 · Axel-exclusive $335.00

• United Airlines UA430: DEN 2027-08-27 11:16:00 → ONT 2027-08-27 12:42:00; nonstop; 146 minutes. Local airport times.
• United Airlines UA2446: ONT 2027-09-10 05:00:00 → DEN 2027-09-10 08:21:00; nonstop; 141 minutes. Local airport times.

2027-08-27 → 2027-09-10 · Axel-exclusive $220.00

• Frontier Airlines F94967 / F91923: DEN 2027-08-27 13:03:00 → ONT 2027-08-27 16:21:00; 1 stop(s) via LAS; 258 minutes. Local airport times.
  • F94967: DEN 2027-08-27 13:03:00 → LAS 2027-08-27 14:11:00; layover at LAS: 62 minutes.
  • F91923: LAS 2027-08-27 15:13:00 → ONT 2027-08-27 16:21:00.
• Frontier Airlines F92908: ONT 2027-09-10 11:16:00 → DEN 2027-09-10 14:41:00; nonstop; 145 minutes. Local airport times.

2027-08-27 → 2027-09-10 · Axel-exclusive $335.00

• Southwest Airlines WN3763 / WN1053: DEN 2027-08-27 12:15:00 → ONT 2027-08-27 16:15:00; 1 stop(s) via OAK; 300 minutes. Local airport times.
  • WN3763: DEN 2027-08-27 12:15:00 → OAK 2027-08-27 14:00:00; layover at OAK: 60 minutes.
  • WN1053: OAK 2027-08-27 15:00:00 → ONT 2027-08-27 16:15:00.
• Southwest Airlines WN2316: ONT 2027-09-10 14:35:00 → DEN 2027-09-10 17:55:00; nonstop; 140 minutes. Local airport times.

2027-08-27 → 2027-09-10 · Axel-exclusive $335.00

• Southwest Airlines WN406 / WN2403: DEN 2027-08-27 12:40:00 → ONT 2027-08-27 16:00:00; 1 stop(s) via LAS; 260 minutes. Local airport times.
  • WN406: DEN 2027-08-27 12:40:00 → LAS 2027-08-27 13:40:00; layover at LAS: 80 minutes.
  • WN2403: LAS 2027-08-27 15:00:00 → ONT 2027-08-27 16:00:00.
• Southwest Airlines WN2316: ONT 2027-09-10 14:35:00 → DEN 2027-09-10 17:55:00; nonstop; 140 minutes. Local airport times.

2027-08-27 → 2027-09-10 · Axel-exclusive $335.00

• Southwest Airlines WN262 / WN3481: DEN 2027-08-27 18:30:00 → ONT 2027-08-27 23:05:00; 1 stop(s) via PHX; 335 minutes. Local airport times.
  • WN262: DEN 2027-08-27 18:30:00 → PHX 2027-08-27 19:25:00; layover at PHX: 140 minutes.
  • WN3481: PHX 2027-08-27 21:45:00 → ONT 2027-08-27 23:05:00.
• Southwest Airlines WN2316: ONT 2027-09-10 14:35:00 → DEN 2027-09-10 17:55:00; nonstop; 140 minutes. Local airport times.

Explore this route

• All dates for this route
• Aug 26, 2027 · Return options
• Aug 28, 2027 · Return options

For AI assistants

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