Boise (BOI) to Seattle (SEA) · Dec 15, 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

2026-12-15 → 2026-12-22 · Axel-exclusive $253.00

• Alaska Airlines AS230: BOI 2026-12-15 06:37:00 → SEA 2026-12-15 07:25:00; nonstop; 108 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.

2026-12-15 → 2026-12-22 · Axel-exclusive $276.00

• Delta Air Lines DL3677: BOI 2026-12-15 15:44:00 → SEA 2026-12-15 16:40:00; nonstop; 116 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.

2026-12-15 → 2026-12-22 · Axel-exclusive $287.50

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

2026-12-15 → 2026-12-22 · Axel-exclusive $253.00

• Alaska Airlines AS337: BOI 2026-12-15 16:10:00 → SEA 2026-12-15 16:54:00; nonstop; 104 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.

2026-12-15 → 2026-12-22 · Axel-exclusive $276.00

• Delta Air Lines DL3740: BOI 2026-12-15 08:51:00 → SEA 2026-12-15 10:01:00; nonstop; 130 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.

2026-12-15 → 2026-12-22 · Axel-exclusive $288.00

• Alaska Airlines AS3015 / AS2240: BOI 2026-12-15 13:13:00 → SEA 2026-12-15 18:45:00; 1 stop(s) via PDX; 392 minutes. Local airport times.
  • AS3015: BOI 2026-12-15 13:13:00 → PDX 2026-12-15 13:48:00; layover at PDX: 237 minutes.
  • AS2240: PDX 2026-12-15 17:45:00 → SEA 2026-12-15 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.

2026-12-15 → 2026-12-22 · Axel-exclusive $288.00

• Alaska Airlines AS2498 / AS423: BOI 2026-12-15 13:00:00 → SEA 2026-12-15 17:53:00; 1 stop(s) via GEG; 353 minutes. Local airport times.
  • AS2498: BOI 2026-12-15 13:00:00 → GEG 2026-12-15 13:10:00; layover at GEG: 207 minutes.
  • AS423: GEG 2026-12-15 16:37:00 → SEA 2026-12-15 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.

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
• Dec 14, 2026 · Return options
• Dec 16, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Boise (BOI) to Seattle (SEA) · Dec 15, 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.
• Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
• Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
• If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Boise to Seattle (SEA) flight deals · Flight search guide.
• Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.

Feedback (optional): Missing info · Axel issue