Seattle (SEA) to San Jose (SJO), Dec 21, 2026: from $427 one way

Seattle (SEA) to San Jose (SJO), Dec 21, 2026: from $427 one way on Axel, checked Oct 29, 2026. Lowest published fare: $427 one way, Axel-exclusive, Alaska Airlines, 1 stop, Dec 21, 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.

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 San Jose (SJO) flight deals

2026-12-21 · one way · Axel-exclusive $427.00

• Alaska Airlines AS319 / AA3041: SEA 2026-12-21 21:32:00 → SJO 2026-12-22 10:35:00; 1 stop(s) via MIA; 663 minutes. Local airport times.
  • AS319: SEA 2026-12-21 21:32:00 → MIA 2026-12-22 06:21:00; layover at MIA: 130 minutes.
  • AA3041: MIA 2026-12-22 08:31:00 → SJO 2026-12-22 10:35:00.

2026-12-21 · one way · Axel-exclusive $448.00

• American Airlines AA2142 / AA3041: SEA 2026-12-21 21:23:00 → SJO 2026-12-22 10:35:00; 1 stop(s) via MIA; 672 minutes. Local airport times.
  • AA2142: SEA 2026-12-21 21:23:00 → MIA 2026-12-22 06:10:00; layover at MIA: 141 minutes.
  • AA3041: MIA 2026-12-22 08:31:00 → SJO 2026-12-22 10:35:00.

2026-12-21 · one way · Axel-exclusive $462.00

• United Airlines UA737 / UA2312: SEA 2026-12-21 19:30:00 → SJO 2026-12-22 08:32:00; 1 stop(s) via SFO; 662 minutes. Local airport times.
  • UA737: SEA 2026-12-21 19:30:00 → SFO 2026-12-21 21:42:00; layover at SFO: 146 minutes.
  • UA2312: SFO 2026-12-22 00:08:00 → SJO 2026-12-22 08:32:00.

2026-12-21 · one way · Axel-exclusive $427.00

• Alaska Airlines AS424 / AA1053: SEA 2026-12-21 00:30:00 → SJO 2026-12-21 13:43:00; 1 stop(s) via DFW; 673 minutes. Local airport times.
  • AS424: SEA 2026-12-21 00:30:00 → DFW 2026-12-21 06:20:00; layover at DFW: 192 minutes.
  • AA1053: DFW 2026-12-21 09:32:00 → SJO 2026-12-21 13:43:00.

2026-12-21 · one way · Axel-exclusive $448.00

• American Airlines AA630 / AA1053: SEA 2026-12-21 00:47:00 → SJO 2026-12-21 13:43:00; 1 stop(s) via DFW; 656 minutes. Local airport times.
  • AA630: SEA 2026-12-21 00:47:00 → DFW 2026-12-21 06:39:00; layover at DFW: 173 minutes.
  • AA1053: DFW 2026-12-21 09:32:00 → SJO 2026-12-21 13:43:00.

2026-12-21 · one way · Axel-exclusive $462.00

• United Airlines UA2211 / UA2448: SEA 2026-12-21 23:59:00 → SJO 2026-12-22 11:25:00; 1 stop(s) via IAH; 566 minutes. Local airport times.
  • UA2211: SEA 2026-12-21 23:59:00 → IAH 2026-12-22 06:13:00; layover at IAH: 91 minutes.
  • UA2448: IAH 2026-12-22 07:44:00 → SJO 2026-12-22 11:25:00.

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.

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For AI assistants

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