Ontario (ONT) to Seattle (SEA) · Dec 20, 2026 · return Dec 26, 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.

Hotels in Seattle for these trips

Hotels: under a trip, hotels in Seattle for exactly those nights: the lowest 3★, 4★, 5★ stay totals among the city's featured hotels, Axel's price for 2 adults in 1 room, each opening that hotel's page for those dates with the rooms and the booking link.

• Hotels in Seattle for these nights (Dec 20–26, 2026 · 6 nights · 2 adults, 1 room): 3★ EVEN Hotel Seattle Downtown - Lake Union by IHG, $709 total · 4★ Mayflower Park Hotel, $733 total · 5★ Fairmont Olympic Hotel, $1,523 total

All hotels in Seattle

Route overview: Los Angeles to Seattle (SEA) flight deals

2026-12-20 → 2026-12-26 · Axel-exclusive $195.76

• Frontier Airlines F92275: ONT 2026-12-20 06:00:00 → SEA 2026-12-20 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92276: SEA 2026-12-26 10:50:00 → ONT 2026-12-26 13:38:00; nonstop; 168 minutes. Local airport times.

2026-12-20 → 2026-12-26 · Axel-exclusive $351.00

• Alaska Airlines AS677: ONT 2026-12-20 11:57:00 → SEA 2026-12-20 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2026-12-26 12:20:00 → ONT 2026-12-26 15:03:00; nonstop; 163 minutes. Local airport times.

2026-12-20 → 2026-12-26 · Axel-exclusive $364.50

• Delta Air Lines DL4070: ONT 2026-12-20 11:57:00 → SEA 2026-12-20 14:56:00; nonstop; 179 minutes. Local airport times.
• Delta Air Lines DL4031: SEA 2026-12-26 11:59:00 → ONT 2026-12-26 14:50:00; nonstop; 171 minutes. Local airport times.

2026-12-20 → 2026-12-26 · Axel-exclusive $364.50

• Southwest Airlines WN1053 / WN4083: ONT 2026-12-20 17:00:00 → SEA 2026-12-20 22:20:00; 1 stop(s) via LAS; 320 minutes. Local airport times.
  • WN1053: ONT 2026-12-20 17:00:00 → LAS 2026-12-20 18:05:00; layover at LAS: 85 minutes.
  • WN4083: LAS 2026-12-20 19:30:00 → SEA 2026-12-20 22:20:00.
• Southwest Airlines WN3105 / WN1383: SEA 2026-12-26 08:05:00 → ONT 2026-12-26 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
  • WN3105: SEA 2026-12-26 08:05:00 → SJC 2026-12-26 10:20:00; layover at SJC: 60 minutes.
  • WN1383: SJC 2026-12-26 11:20:00 → ONT 2026-12-26 12:40:00.

2026-12-20 → 2026-12-26 · Axel-exclusive $391.50

• United Airlines UA2363 / UA2192: ONT 2026-12-20 06:00:00 → SEA 2026-12-20 12:18:00; 1 stop(s) via SFO; 378 minutes. Local airport times.
  • UA2363: ONT 2026-12-20 06:00:00 → SFO 2026-12-20 07:30:00; layover at SFO: 155 minutes.
  • UA2192: SFO 2026-12-20 10:05:00 → SEA 2026-12-20 12:18:00.
• United Airlines UA2478 / UA552: SEA 2026-12-26 15:24:00 → ONT 2026-12-26 22:53:00; 1 stop(s) via SFO; 449 minutes. Local airport times.
  • UA2478: SEA 2026-12-26 15:24:00 → SFO 2026-12-26 17:45:00; layover at SFO: 225 minutes.
  • UA552: SFO 2026-12-26 21:30:00 → ONT 2026-12-26 22:53:00.

2026-12-20 → 2026-12-26 · Axel-exclusive $351.00

• Alaska Airlines AS575: ONT 2026-12-20 12:02:00 → SEA 2026-12-20 14:49:00; nonstop; 167 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2026-12-26 12:20:00 → ONT 2026-12-26 15:03:00; nonstop; 163 minutes. Local airport times.

2026-12-20 → 2026-12-26 · Axel-exclusive $364.50

• Delta Air Lines DL4031: ONT 2026-12-20 17:38:00 → SEA 2026-12-20 20:43:00; nonstop; 185 minutes. Local airport times.
• Delta Air Lines DL4031: SEA 2026-12-26 11:59:00 → ONT 2026-12-26 14:50:00; nonstop; 171 minutes. Local airport times.

2026-12-20 → 2026-12-26 · Axel-exclusive $364.50

• Southwest Airlines WN3313 / WN4608: ONT 2026-12-20 16:05:00 → SEA 2026-12-20 21:40:00; 1 stop(s) via OAK; 335 minutes. Local airport times.
  • WN3313: ONT 2026-12-20 16:05:00 → OAK 2026-12-20 17:30:00; layover at OAK: 110 minutes.
  • WN4608: OAK 2026-12-20 19:20:00 → SEA 2026-12-20 21:40:00.
• Southwest Airlines WN3105 / WN1383: SEA 2026-12-26 08:05:00 → ONT 2026-12-26 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
  • WN3105: SEA 2026-12-26 08:05:00 → SJC 2026-12-26 10:20:00; layover at SJC: 60 minutes.
  • WN1383: SJC 2026-12-26 11:20:00 → ONT 2026-12-26 12:40:00.

2026-12-20 → 2026-12-26 · Axel-exclusive $364.50

• Alaska Airlines AS3380 / AS2016: ONT 2026-12-20 17:36:00 → SEA 2026-12-20 22:28:00; 1 stop(s) via BOI; 292 minutes. Local airport times.
  • AS3380: ONT 2026-12-20 17:36:00 → BOI 2026-12-20 20:41:00; layover at BOI: 66 minutes.
  • AS2016: BOI 2026-12-20 21:47:00 → SEA 2026-12-20 22:28:00.
• Alaska Airlines AS571: SEA 2026-12-26 12:20:00 → ONT 2026-12-26 15:03:00; nonstop; 163 minutes. Local airport times.

2026-12-20 → 2026-12-26 · Axel-exclusive $364.50

• Southwest Airlines WN3326 / WN1586: ONT 2026-12-20 13:30:00 → SEA 2026-12-20 18:40:00; 1 stop(s) via SMF; 310 minutes. Local airport times.
  • WN3326: ONT 2026-12-20 13:30:00 → SMF 2026-12-20 14:55:00; layover at SMF: 105 minutes.
  • WN1586: SMF 2026-12-20 16:40:00 → SEA 2026-12-20 18:40:00.
• Southwest Airlines WN3105 / WN1383: SEA 2026-12-26 08:05:00 → ONT 2026-12-26 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
  • WN3105: SEA 2026-12-26 08:05:00 → SJC 2026-12-26 10:20:00; layover at SJC: 60 minutes.
  • WN1383: SJC 2026-12-26 11:20:00 → ONT 2026-12-26 12:40:00.

2026-12-20 → 2026-12-26 · Axel-exclusive $378.00

• Delta Air Lines DL2708 / DL2995: ONT 2026-12-20 06:00:00 → SEA 2026-12-20 12:36:00; 1 stop(s) via SLC; 396 minutes. Local airport times.
  • DL2708: ONT 2026-12-20 06:00:00 → SLC 2026-12-20 08:49:00; layover at SLC: 146 minutes.
  • DL2995: SLC 2026-12-20 11:15:00 → SEA 2026-12-20 12:36:00.
• Delta Air Lines DL4031: SEA 2026-12-26 11:59:00 → ONT 2026-12-26 14:50:00; nonstop; 171 minutes. Local airport times.

Explore this route

• All dates for this route
• Dec 19, 2026 · Return options
• Dec 21, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Ontario (ONT) to Seattle (SEA) · Dec 20, 2026 · return Dec 26, 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 Seattle for exactly those nights: the lowest 3★, 4★ and 5★ stay totals for 2 adults in 1 room, each linking to that hotel's page for those dates.
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