Ontario (ONT) to Seattle (SEA) · Jan 2, 2027 · return Jan 5, 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: Los Angeles to Seattle (SEA) flight deals

2027-01-02 → 2027-01-05 · Axel-exclusive $276.90

• Alaska Airlines AS677: ONT 2027-01-02 11:57:00 → SEA 2027-01-02 14:49:00; nonstop; 172 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-05 13:33:00 → ONT 2027-01-05 16:05:00; nonstop; 152 minutes. Local airport times.

2027-01-02 → 2027-01-05 · Axel-exclusive $287.55

• Delta Air Lines DL4070: ONT 2027-01-02 11:57:00 → SEA 2027-01-02 14:56:00; nonstop; 179 minutes. Local airport times.
• Delta Air Lines DL4070: SEA 2027-01-05 08:25:00 → ONT 2027-01-05 11:17:00; nonstop; 172 minutes. Local airport times.

2027-01-02 → 2027-01-05 · Axel-exclusive $175.80

• Frontier Airlines F92275: ONT 2027-01-02 06:00:00 → SEA 2027-01-02 09:03:00; nonstop; 183 minutes. Local airport times.
• Frontier Airlines F92408 / F91923: SEA 2027-01-05 11:53:00 → ONT 2027-01-05 18:31:00; 1 stop(s) via LAS; 398 minutes. Local airport times.
  • F92408: SEA 2027-01-05 11:53:00 → LAS 2027-01-05 14:32:00; layover at LAS: 173 minutes.
  • F91923: LAS 2027-01-05 17:25:00 → ONT 2027-01-05 18:31:00.

2027-01-02 → 2027-01-05 · Axel-exclusive $287.55

• Southwest Airlines WN1053 / WN4083: ONT 2027-01-02 17:00:00 → SEA 2027-01-02 22:20:00; 1 stop(s) via LAS; 320 minutes. Local airport times.
  • WN1053: ONT 2027-01-02 17:00:00 → LAS 2027-01-02 18:05:00; layover at LAS: 85 minutes.
  • WN4083: LAS 2027-01-02 19:30:00 → SEA 2027-01-02 22:20:00.
• Southwest Airlines WN3105 / WN1383: SEA 2027-01-05 08:05:00 → ONT 2027-01-05 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
  • WN3105: SEA 2027-01-05 08:05:00 → SJC 2027-01-05 10:20:00; layover at SJC: 60 minutes.
  • WN1383: SJC 2027-01-05 11:20:00 → ONT 2027-01-05 12:40:00.

2027-01-02 → 2027-01-05 · Axel-exclusive $276.90

• Alaska Airlines AS575: ONT 2027-01-02 12:02:00 → SEA 2027-01-02 14:49:00; nonstop; 167 minutes. Local airport times.
• Alaska Airlines AS571: SEA 2027-01-05 13:33:00 → ONT 2027-01-05 16:05:00; nonstop; 152 minutes. Local airport times.

2027-01-02 → 2027-01-05 · Axel-exclusive $287.55

• Delta Air Lines DL4031: ONT 2027-01-02 17:38:00 → SEA 2027-01-02 20:43:00; nonstop; 185 minutes. Local airport times.
• Delta Air Lines DL4070: SEA 2027-01-05 08:25:00 → ONT 2027-01-05 11:17:00; nonstop; 172 minutes. Local airport times.

2027-01-02 → 2027-01-05 · Axel-exclusive $287.55

• Southwest Airlines WN3313 / WN4608: ONT 2027-01-02 16:05:00 → SEA 2027-01-02 21:40:00; 1 stop(s) via OAK; 335 minutes. Local airport times.
  • WN3313: ONT 2027-01-02 16:05:00 → OAK 2027-01-02 17:30:00; layover at OAK: 110 minutes.
  • WN4608: OAK 2027-01-02 19:20:00 → SEA 2027-01-02 21:40:00.
• Southwest Airlines WN3105 / WN1383: SEA 2027-01-05 08:05:00 → ONT 2027-01-05 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
  • WN3105: SEA 2027-01-05 08:05:00 → SJC 2027-01-05 10:20:00; layover at SJC: 60 minutes.
  • WN1383: SJC 2027-01-05 11:20:00 → ONT 2027-01-05 12:40:00.

2027-01-02 → 2027-01-05 · Axel-exclusive $287.55

• Southwest Airlines WN3326 / WN1586: ONT 2027-01-02 13:30:00 → SEA 2027-01-02 18:40:00; 1 stop(s) via SMF; 310 minutes. Local airport times.
  • WN3326: ONT 2027-01-02 13:30:00 → SMF 2027-01-02 14:55:00; layover at SMF: 105 minutes.
  • WN1586: SMF 2027-01-02 16:40:00 → SEA 2027-01-02 18:40:00.
• Southwest Airlines WN3105 / WN1383: SEA 2027-01-05 08:05:00 → ONT 2027-01-05 12:40:00; 1 stop(s) via SJC; 275 minutes. Local airport times.
  • WN3105: SEA 2027-01-05 08:05:00 → SJC 2027-01-05 10:20:00; layover at SJC: 60 minutes.
  • WN1383: SJC 2027-01-05 11:20:00 → ONT 2027-01-05 12:40:00.

2027-01-02 → 2027-01-05 · Axel-exclusive $288.70

• Alaska Airlines AS3380 / AS2016: ONT 2027-01-02 17:36:00 → SEA 2027-01-02 22:28:00; 1 stop(s) via BOI; 292 minutes. Local airport times.
  • AS3380: ONT 2027-01-02 17:36:00 → BOI 2027-01-02 20:41:00; layover at BOI: 66 minutes.
  • AS2016: BOI 2027-01-02 21:47:00 → SEA 2027-01-02 22:28:00.
• Alaska Airlines AS571: SEA 2027-01-05 13:33:00 → ONT 2027-01-05 16:05:00; nonstop; 152 minutes. Local airport times.

2027-01-02 → 2027-01-05 · Axel-exclusive $297.05

• Delta Air Lines DL4031: ONT 2027-01-02 17:55:00 → SEA 2027-01-02 21:00:00; nonstop; 185 minutes. Local airport times.
• Delta Air Lines DL1016 / DL3879: SEA 2027-01-05 09:18:00 → ONT 2027-01-05 16:22:00; 1 stop(s) via SLC; 424 minutes. Local airport times.
  • DL1016: SEA 2027-01-05 09:18:00 → SLC 2027-01-05 12:31:00; layover at SLC: 178 minutes.
  • DL3879: SLC 2027-01-05 15:29:00 → ONT 2027-01-05 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
• Jan 1, 2027 · Return options
• Jan 3, 2027 · Return options
• Hotels in Seattle with Axel

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