Seattle (SEA) to Ontario (ONT), Nov 23, 2026: from $115 one way

Seattle (SEA) to Ontario (ONT), Nov 23, 2026: from $115 one way on Axel, checked Oct 29, 2026. Lowest published fare: $115 one way, Axel-exclusive, Frontier Airlines, nonstop, Nov 23, 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.

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Route overview: Seattle to Ontario (ONT) flight deals

2026-11-23 · one way · Axel-exclusive $114.75

• Frontier Airlines F92276: SEA 2026-11-23 10:18:00 → ONT 2026-11-23 13:06:00; nonstop; 168 minutes. Local airport times.

2026-11-23 · one way · Axel-exclusive $195.75

• Alaska Airlines AS575: SEA 2026-11-23 08:34:00 → ONT 2026-11-23 11:18:00; nonstop; 164 minutes. Local airport times.

2026-11-23 · one way · Axel-exclusive $202.50

• Delta Air Lines DL4031: SEA 2026-11-23 11:59:00 → ONT 2026-11-23 14:50:00; nonstop; 171 minutes. Local airport times.

2026-11-23 · one way · Axel-exclusive $222.75

• Southwest Airlines WN3105 / WN1383: SEA 2026-11-23 08:05:00 → ONT 2026-11-23 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
  • WN3105: SEA 2026-11-23 08:05:00 → SJC 2026-11-23 10:20:00; layover at SJC: 60 minutes.
  • WN1383: SJC 2026-11-23 11:20:00 → ONT 2026-11-23 12:40:00.

2026-11-23 · one way · Axel-exclusive $249.75

• American Airlines AA2073 / AA1841: SEA 2026-11-23 15:00:00 → ONT 2026-11-23 21:52:00; 1 stop(s) via PHX; 412 minutes. Local airport times.
  • AA2073: SEA 2026-11-23 15:00:00 → PHX 2026-11-23 18:52:00; layover at PHX: 163 minutes.
  • AA1841: PHX 2026-11-23 21:35:00 → ONT 2026-11-23 21:52:00.

2026-11-23 · one way · Axel-exclusive $249.75

• United Airlines UA2478 / UA552: SEA 2026-11-23 15:24:00 → ONT 2026-11-23 22:53:00; 1 stop(s) via SFO; 449 minutes. Local airport times.
  • UA2478: SEA 2026-11-23 15:24:00 → SFO 2026-11-23 17:45:00; layover at SFO: 225 minutes.
  • UA552: SFO 2026-11-23 21:30:00 → ONT 2026-11-23 22:53:00.

2026-11-23 · one way · Axel-exclusive $195.75

• Alaska Airlines AS594: SEA 2026-11-23 15:41:00 → ONT 2026-11-23 18:17:00; nonstop; 156 minutes. Local airport times.

2026-11-23 · one way · Axel-exclusive $155.25

• Frontier Airlines F92408 / F91923: SEA 2026-11-23 11:53:00 → ONT 2026-11-23 18:31:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
  • F92408: SEA 2026-11-23 11:53:00 → LAS 2026-11-23 14:32:00; layover at LAS: 173 minutes.
  • F91923: LAS 2026-11-23 17:25:00 → ONT 2026-11-23 18:31:00.

2026-11-23 · one way · Axel-exclusive $236.25

• Alaska Airlines AS3087 / AS3380: SEA 2026-11-23 09:50:00 → ONT 2026-11-23 16:56:00; 1 stop(s) via BOI; 426 minutes. Local airport times.
  • AS3087: SEA 2026-11-23 09:50:00 → BOI 2026-11-23 12:21:00; layover at BOI: 199 minutes.
  • AS3380: BOI 2026-11-23 15:40:00 → ONT 2026-11-23 16:56:00.

2026-11-23 · one way · Axel-exclusive $243.00

• Delta Air Lines DL1016 / DL3879: SEA 2026-11-23 09:18:00 → ONT 2026-11-23 16:22:00; 1 stop(s) via SLC; 424 minutes. Local airport times.
  • DL1016: SEA 2026-11-23 09:18:00 → SLC 2026-11-23 12:31:00; layover at SLC: 178 minutes.
  • DL3879: SLC 2026-11-23 15:29:00 → ONT 2026-11-23 16:22:00.

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
• Nov 22, 2026 · Return options
• Nov 24, 2026 · Return options

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