Boise (BOI) to Seattle (SEA), Dec 5–18, 2026: from $220 round trip

Boise (BOI) to Seattle (SEA), Dec 5–18, 2026: from $220 round trip on Axel, checked Nov 15, 2026. Lowest published fare: $220 round trip, Axel-exclusive, Alaska Airlines, nonstop, Dec 5–18, 2026, 1 adult, economy, checked Nov 15, 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 link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the nightly rate and the stay's total, from the lowest saved total among the shortlisted hotels in that star tier for those dates.

• Hotels in Seattle for these nights (Dec 5–18, 2026 · 13 nights · 2 adults, 1 room): 3★ Red Lion Hotel Bellevue, $80 a night, $1,035 for 13 nights · 4★ Hilton Seattle Airport & Conference Center, $119 a night, $1,547 for 13 nights · 5★ Fairmont Olympic Hotel, $300 a night, $3,906 for 13 nights

All hotels in Seattle

Route overview: Boise to Seattle (SEA) flight deals

2026-12-05 → 2026-12-18 · Axel-exclusive $220

• Alaska Airlines AS485: BOI 2026-12-05 06:31:00 → SEA 2026-12-05 07:20:00; nonstop; 109 minutes. Local airport times.
• Alaska Airlines AS2344: SEA 2026-12-18 11:51:00 → BOI 2026-12-18 14:18:00; nonstop; 87 minutes. Local airport times.

2026-12-05 → 2026-12-18 · Axel-exclusive $240

• Delta Air Lines DL4127: BOI 2026-12-05 14:10:00 → SEA 2026-12-05 15:00:00; nonstop; 110 minutes. Local airport times.
• Delta Air Lines DL3688: SEA 2026-12-18 14:44:00 → BOI 2026-12-18 17:15:00; nonstop; 91 minutes. Local airport times.

2026-12-05 → 2026-12-18 · Axel-exclusive $250

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

2026-12-05 → 2026-12-18 · Axel-exclusive $220

• Alaska Airlines AS3016: BOI 2026-12-05 18:00:00 → SEA 2026-12-05 18:50:00; nonstop; 110 minutes. Local airport times.
• Alaska Airlines AS2344: SEA 2026-12-18 11:51:00 → BOI 2026-12-18 14:18:00; nonstop; 87 minutes. Local airport times.

2026-12-05 → 2026-12-18 · Axel-exclusive $240

• Delta Air Lines DL3750: BOI 2026-12-05 10:37:00 → SEA 2026-12-05 11:36:00; nonstop; 119 minutes. Local airport times.
• Delta Air Lines DL3688: SEA 2026-12-18 14:44:00 → BOI 2026-12-18 17:15:00; nonstop; 91 minutes. Local airport times.

2026-12-05 → 2026-12-18 · Axel-exclusive $255

• Alaska Airlines AS3015 / AS2240: BOI 2026-12-05 13:13:00 → SEA 2026-12-05 18:45:00; 1 stop(s) via PDX; 392 minutes. Local airport times.
  • AS3015: BOI 2026-12-05 13:13:00 → PDX 2026-12-05 13:48:00; layover at PDX: 237 minutes.
  • AS2240: PDX 2026-12-05 17:45:00 → SEA 2026-12-05 18:45:00.
• Alaska Airlines AS2344: SEA 2026-12-18 11:51:00 → BOI 2026-12-18 14:18:00; nonstop; 87 minutes. Local airport times.

2026-12-05 → 2026-12-18 · Axel-exclusive $255

• Alaska Airlines AS2498 / AS423: BOI 2026-12-05 13:00:00 → SEA 2026-12-05 17:53:00; 1 stop(s) via GEG; 353 minutes. Local airport times.
  • AS2498: BOI 2026-12-05 13:00:00 → GEG 2026-12-05 13:10:00; layover at GEG: 207 minutes.
  • AS423: GEG 2026-12-05 16:37:00 → SEA 2026-12-05 17:53:00.
• Alaska Airlines AS2344: SEA 2026-12-18 11:51:00 → BOI 2026-12-18 14:18:00; nonstop; 87 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 4, 2026 · Return options
• Dec 6, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Boise (BOI) to Seattle (SEA) · Dec 5, 2026 · return Dec 18, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with its displayed check date. Under a trip, hotels in Seattle for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the nightly rate and the stay's total, from the lowest saved total among the shortlisted hotels in each star tier for those dates.
• Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
• 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