Denver (DEN) to Ontario (ONT) · Jan 25, 2027 · one way

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

2027-01-25 · one way · Axel-exclusive $85.00

• Frontier Airlines F92907: DEN 2027-01-25 09:20:00 → ONT 2027-01-25 10:45:00; nonstop; 145 minutes. Local airport times.

2027-01-25 · one way · Axel-exclusive $135.00

• Southwest Airlines WN2827: DEN 2027-01-25 21:00:00 → ONT 2027-01-25 22:30:00; nonstop; 150 minutes. Local airport times.

2027-01-25 · one way · Axel-exclusive $145.00

• United Airlines UA430: DEN 2027-01-25 11:16:00 → ONT 2027-01-25 12:42:00; nonstop; 146 minutes. Local airport times.

2027-01-25 · one way · Axel-exclusive $165.00

• American Airlines AA2447 / AA4144: DEN 2027-01-25 12:06:00 → ONT 2027-01-25 16:20:00; 1 stop(s) via PHX; 314 minutes. Local airport times.
  • AA2447: DEN 2027-01-25 12:06:00 → PHX 2027-01-25 14:03:00; layover at PHX: 113 minutes.
  • AA4144: PHX 2027-01-25 15:56:00 → ONT 2027-01-25 16:20:00.

2027-01-25 · one way · Axel-exclusive $175.00

• Delta Air Lines DL1553 / DL3879: DEN 2027-01-25 12:29:00 → ONT 2027-01-25 16:22:00; 1 stop(s) via SLC; 293 minutes. Local airport times.
  • DL1553: DEN 2027-01-25 12:29:00 → SLC 2027-01-25 14:06:00; layover at SLC: 83 minutes.
  • DL3879: SLC 2027-01-25 15:29:00 → ONT 2027-01-25 16:22:00.

2027-01-25 · one way · Axel-exclusive $85.00

• Frontier Airlines F91261: DEN 2027-01-25 22:48:00 → ONT 2027-01-26 00:13:00; nonstop; 145 minutes. Local airport times.

2027-01-25 · one way · Axel-exclusive $135.00

• Southwest Airlines WN2484: DEN 2027-01-25 13:15:00 → ONT 2027-01-25 14:40:00; nonstop; 145 minutes. Local airport times.

2027-01-25 · one way · Axel-exclusive $145.00

• United Airlines UA1542: DEN 2027-01-25 19:45:00 → ONT 2027-01-25 21:11:00; nonstop; 146 minutes. Local airport times.

2027-01-25 · one way · Axel-exclusive $100.00

• Frontier Airlines F94967 / F91923: DEN 2027-01-25 13:03:00 → ONT 2027-01-25 16:21:00; 1 stop(s) via LAS; 258 minutes. Local airport times.
  • F94967: DEN 2027-01-25 13:03:00 → LAS 2027-01-25 14:11:00; layover at LAS: 62 minutes.
  • F91923: LAS 2027-01-25 15:13:00 → ONT 2027-01-25 16:21:00.

2027-01-25 · one way · Axel-exclusive $150.00

• Southwest Airlines WN262 / WN3481: DEN 2027-01-25 18:30:00 → ONT 2027-01-25 23:05:00; 1 stop(s) via PHX; 335 minutes. Local airport times.
  • WN262: DEN 2027-01-25 18:30:00 → PHX 2027-01-25 20:25:00; layover at PHX: 140 minutes.
  • WN3481: PHX 2027-01-25 22:45:00 → ONT 2027-01-25 23:05:00.

2027-01-25 · one way · Axel-exclusive $150.00

• Southwest Airlines WN3763 / WN1053: DEN 2027-01-25 12:15:00 → ONT 2027-01-25 16:15:00; 1 stop(s) via OAK; 300 minutes. Local airport times.
  • WN3763: DEN 2027-01-25 12:15:00 → OAK 2027-01-25 14:00:00; layover at OAK: 60 minutes.
  • WN1053: OAK 2027-01-25 15:00:00 → ONT 2027-01-25 16:15:00.

2027-01-25 · one way · Axel-exclusive $150.00

• Southwest Airlines WN406 / WN2403: DEN 2027-01-25 12:40:00 → ONT 2027-01-25 16:00:00; 1 stop(s) via LAS; 260 minutes. Local airport times.
  • WN406: DEN 2027-01-25 12:40:00 → LAS 2027-01-25 13:40:00; layover at LAS: 80 minutes.
  • WN2403: LAS 2027-01-25 15:00:00 → ONT 2027-01-25 16:00:00.

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.

Explore this route

• All dates for this route
• Jan 24, 2027 · Return options
• Jan 26, 2027 · Return options

For AI assistants

• This page: Denver (DEN) to Ontario (ONT) · Jan 25, 2027 · one way: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
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