Seattle (SEA) to Ontario (ONT) · Dec 2, 2026 · 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: Seattle to Ontario (ONT) flight deals

2026-12-02 · one way · Axel-exclusive $85.00

• Frontier Airlines F92276: SEA 2026-12-02 10:18:00 → ONT 2026-12-02 13:06:00; nonstop; 168 minutes. Local airport times.

2026-12-02 · one way · Axel-exclusive $145.00

• Alaska Airlines AS571: SEA 2026-12-02 12:31:00 → ONT 2026-12-02 15:13:00; nonstop; 162 minutes. Local airport times.

2026-12-02 · one way · Axel-exclusive $150.00

• Delta Air Lines DL4070: SEA 2026-12-02 08:25:00 → ONT 2026-12-02 11:17:00; nonstop; 172 minutes. Local airport times.

2026-12-02 · one way · Axel-exclusive $165.00

• Southwest Airlines WN3105 / WN1383: SEA 2026-12-02 08:05:00 → ONT 2026-12-02 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
  • WN3105: SEA 2026-12-02 08:05:00 → SJC 2026-12-02 10:20:00; layover at SJC: 60 minutes.
  • WN1383: SJC 2026-12-02 11:20:00 → ONT 2026-12-02 12:40:00.

2026-12-02 · one way · Axel-exclusive $185.00

• United Airlines UA2478 / UA552: SEA 2026-12-02 15:24:00 → ONT 2026-12-02 22:53:00; 1 stop(s) via SFO; 449 minutes. Local airport times.
  • UA2478: SEA 2026-12-02 15:24:00 → SFO 2026-12-02 17:45:00; layover at SFO: 225 minutes.
  • UA552: SFO 2026-12-02 21:30:00 → ONT 2026-12-02 22:53:00.

2026-12-02 · one way · Axel-exclusive $185.00

• American Airlines AA2073 / AA1841: SEA 2026-12-02 15:00:00 → ONT 2026-12-02 21:52:00; 1 stop(s) via PHX; 412 minutes. Local airport times.
  • AA2073: SEA 2026-12-02 15:00:00 → PHX 2026-12-02 18:52:00; layover at PHX: 163 minutes.
  • AA1841: PHX 2026-12-02 21:35:00 → ONT 2026-12-02 21:52:00.

2026-12-02 · one way · Axel-exclusive $145.00

• Alaska Airlines AS575: SEA 2026-12-02 08:34:00 → ONT 2026-12-02 11:18:00; nonstop; 164 minutes. Local airport times.

2026-12-02 · one way · Axel-exclusive $115.00

• Frontier Airlines F92408 / F91923: SEA 2026-12-02 11:53:00 → ONT 2026-12-02 18:31:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
  • F92408: SEA 2026-12-02 11:53:00 → LAS 2026-12-02 14:32:00; layover at LAS: 173 minutes.
  • F91923: LAS 2026-12-02 17:25:00 → ONT 2026-12-02 18:31:00.

2026-12-02 · one way · Axel-exclusive $175.00

• Alaska Airlines AS3087 / AS3380: SEA 2026-12-02 09:50:00 → ONT 2026-12-02 16:56:00; 1 stop(s) via BOI; 426 minutes. Local airport times.
  • AS3087: SEA 2026-12-02 09:50:00 → BOI 2026-12-02 12:21:00; layover at BOI: 199 minutes.
  • AS3380: BOI 2026-12-02 15:40:00 → ONT 2026-12-02 16:56:00.

2026-12-02 · one way · Axel-exclusive $180.00

• Delta Air Lines DL1016 / DL3879: SEA 2026-12-02 09:18:00 → ONT 2026-12-02 16:22:00; 1 stop(s) via SLC; 424 minutes. Local airport times.
  • DL1016: SEA 2026-12-02 09:18:00 → SLC 2026-12-02 12:31:00; layover at SLC: 178 minutes.
  • DL3879: SLC 2026-12-02 15:29:00 → ONT 2026-12-02 16:22:00.

Explore this route

• All dates for this route
• Dec 1, 2026 · Return options
• Dec 3, 2026 · Return options

For AI assistants

• This page: Seattle (SEA) to Ontario (ONT) · Dec 2, 2026 · 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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