Boise (BOI) to Seattle (SEA) · Dec 20, 2026 · return Dec 22, 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: Boise to Seattle (SEA) flight deals

2026-12-20 → 2026-12-22 · Axel-exclusive $286.00

• Alaska Airlines AS337: BOI 2026-12-20 16:20:00 → SEA 2026-12-20 17:00:00; nonstop; 100 minutes. Local airport times.
• Alaska Airlines AS3087: SEA 2026-12-22 09:50:00 → BOI 2026-12-22 12:21:00; nonstop; 91 minutes. Local airport times.

2026-12-20 → 2026-12-22 · Axel-exclusive $312.00

• Delta Air Lines DL3775: BOI 2026-12-20 06:15:00 → SEA 2026-12-20 07:14:00; nonstop; 119 minutes. Local airport times.
• Delta Air Lines DL3959: SEA 2026-12-22 13:30:00 → BOI 2026-12-22 16:04:00; nonstop; 94 minutes. Local airport times.

2026-12-20 → 2026-12-22 · Axel-exclusive $325.00

• Southwest Airlines WN784 / WN4889: BOI 2026-12-20 18:40:00 → SEA 2026-12-20 22:20:00; 1 stop(s) via SMF; 280 minutes. Local airport times.
  • WN784: BOI 2026-12-20 18:40:00 → SMF 2026-12-20 19:10:00; layover at SMF: 65 minutes.
  • WN4889: SMF 2026-12-20 20:15:00 → SEA 2026-12-20 22:20:00.
• Southwest Airlines WN3833 / WN866: SEA 2026-12-22 05:15:00 → BOI 2026-12-22 12:25:00; 1 stop(s) via SMF; 370 minutes. Local airport times.
  • WN3833: SEA 2026-12-22 05:15:00 → SMF 2026-12-22 07:05:00; layover at SMF: 175 minutes.
  • WN866: SMF 2026-12-22 10:00:00 → BOI 2026-12-22 12:25:00.

2026-12-20 → 2026-12-22 · Axel-exclusive $286.00

• Alaska Airlines AS3029: BOI 2026-12-20 08:21:00 → SEA 2026-12-20 09:16:00; nonstop; 115 minutes. Local airport times.
• Alaska Airlines AS3087: SEA 2026-12-22 09:50:00 → BOI 2026-12-22 12:21:00; nonstop; 91 minutes. Local airport times.

2026-12-20 → 2026-12-22 · Axel-exclusive $312.00

• Delta Air Lines DL4127: BOI 2026-12-20 14:10:00 → SEA 2026-12-20 15:00:00; nonstop; 110 minutes. Local airport times.
• Delta Air Lines DL3959: SEA 2026-12-22 13:30:00 → BOI 2026-12-22 16:04:00; nonstop; 94 minutes. Local airport times.

2026-12-20 → 2026-12-22 · Axel-exclusive $331.50

• Alaska Airlines AS2498 / AS423: BOI 2026-12-20 13:00:00 → SEA 2026-12-20 17:53:00; 1 stop(s) via GEG; 353 minutes. Local airport times.
  • AS2498: BOI 2026-12-20 13:00:00 → GEG 2026-12-20 13:10:00; layover at GEG: 207 minutes.
  • AS423: GEG 2026-12-20 16:37:00 → SEA 2026-12-20 17:53:00.
• Alaska Airlines AS3087: SEA 2026-12-22 09:50:00 → BOI 2026-12-22 12:21:00; nonstop; 91 minutes. Local airport times.

2026-12-20 → 2026-12-22 · Axel-exclusive $331.50

• Alaska Airlines AS3015 / AS2240: BOI 2026-12-20 13:13:00 → SEA 2026-12-20 18:45:00; 1 stop(s) via PDX; 392 minutes. Local airport times.
  • AS3015: BOI 2026-12-20 13:13:00 → PDX 2026-12-20 13:48:00; layover at PDX: 237 minutes.
  • AS2240: PDX 2026-12-20 17:45:00 → SEA 2026-12-20 18:45:00.
• Alaska Airlines AS3087: SEA 2026-12-22 09:50:00 → BOI 2026-12-22 12:21:00; nonstop; 91 minutes. Local airport times.

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
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For AI assistants

• This page: Boise (BOI) to Seattle (SEA) · Dec 20, 2026 · return Dec 22, 2026: 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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