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Boise → Seattle

Dec 21, 2026 · return Dec 31, 2026

BOI → SEA1 adulteconomyRound trip

7 flight options · 3 airlines

Nonstop flights

Mon, Dec 21 – Thu, Dec 31

Alaska Airlines
10:52 amBOI
1h 38m
Nonstop
11:30 amSEA
Alaska Airlines
11:51 amSEA
1h 27m
Nonstop
2:18 pmBOI

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Delta Air Lines
12:13 pmBOI
1h 47m
Nonstop
1:00 pmSEA
Delta Air Lines
4:47 pmSEA
1h 30m
Nonstop
7:17 pmBOI

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Alaska Airlines
6:21 pmBOI
1h 36m
Nonstop
6:57 pmSEA
Alaska Airlines
11:51 amSEA
1h 27m
Nonstop
2:18 pmBOI

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Delta Air Lines
6:09 pmBOI
1h 56m
Nonstop
7:05 pmSEA
Delta Air Lines
4:47 pmSEA
1h 30m
Nonstop
7:17 pmBOI

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Thu, Dec 31

Southwest Airlines
6:40 pmBOI
4h 40m
SMF · 1h 5m
10:20 pmSEA
Southwest Airlines
5:15 amSEA
6h 10m
SMF · 2h 55m
12:25 pmBOI

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Alaska Airlines
1:00 pmBOI
5h 53m
GEG · 3h 27m
5:53 pmSEA
Alaska Airlines
11:51 amSEA
1h 27m
Nonstop
2:18 pmBOI

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Alaska Airlines
1:13 pmBOI
6h 32m
PDX · 3h 57m
6:45 pmSEA
Alaska Airlines
11:51 amSEA
1h 27m
Nonstop
2:18 pmBOI

Round-trip total · 1 adult · Taxes included

Make this trip yours

BOI ⇄ SEA

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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More dates

All dates for this routeNov 24, 2026 → Nov 29, 2026Dec 22, 2026 → Dec 27, 2026Dec 30, 2026 → Jan 2, 2027Jan 15, 2027 → Jan 18, 2027Oct 30, 2026 → Nov 2, 2026Oct 31, 2026 → Nov 7, 2026Nov 27, 2026 → Nov 30, 2026Nov 28, 2026 → Dec 5, 2026Dec 25, 2026 → Dec 28, 2026Dec 26, 2026 → Jan 2, 2027Jan 22, 2027 → Jan 25, 2027Oct 30, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-21 → 2026-12-31Alaska AirlinesAS2347 / AS2344$280.502026-10-29T00:51:24Z
2026-12-21 → 2026-12-31Delta Air LinesDL3817 / DL3688$306.002026-10-29T00:51:24Z
2026-12-21 → 2026-12-31Southwest AirlinesWN784 + WN4889 / WN3833 + WN866$318.752026-10-29T00:51:24Z
2026-12-21 → 2026-12-31Alaska AirlinesAS2123 / AS2344$280.502026-10-29T00:51:24Z
2026-12-21 → 2026-12-31Delta Air LinesDL3688 / DL3688$306.002026-10-29T00:51:24Z
2026-12-21 → 2026-12-31Alaska AirlinesAS2498 + AS423 / AS2344$326.002026-10-29T00:51:24Z
2026-12-21 → 2026-12-31Alaska AirlinesAS3015 + AS2240 / AS2344$326.002026-10-29T00:51:24Z

2026-12-21 → 2026-12-31 · $280.50

  • Alaska Airlines AS2347: BOI 2026-12-21 10:52:00 → SEA 2026-12-21 11:30:00; nonstop; 98 minutes. Local airport times.
  • Alaska Airlines AS2344: SEA 2026-12-31 11:51:00 → BOI 2026-12-31 14:18:00; nonstop; 87 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $306.00

  • Delta Air Lines DL3817: BOI 2026-12-21 12:13:00 → SEA 2026-12-21 13:00:00; nonstop; 107 minutes. Local airport times.
  • Delta Air Lines DL3688: SEA 2026-12-31 16:47:00 → BOI 2026-12-31 19:17:00; nonstop; 90 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $318.75

  • Southwest Airlines WN784 / WN4889: BOI 2026-12-21 18:40:00 → SEA 2026-12-21 22:20:00; 1 stop(s) via SMF; 280 minutes. Local airport times.
    • WN784: BOI 2026-12-21 18:40:00 → SMF 2026-12-21 19:10:00; layover at SMF: 65 minutes.
    • WN4889: SMF 2026-12-21 20:15:00 → SEA 2026-12-21 22:20:00.
  • Southwest Airlines WN3833 / WN866: SEA 2026-12-31 05:15:00 → BOI 2026-12-31 12:25:00; 1 stop(s) via SMF; 370 minutes. Local airport times.
    • WN3833: SEA 2026-12-31 05:15:00 → SMF 2026-12-31 07:05:00; layover at SMF: 175 minutes.
    • WN866: SMF 2026-12-31 10:00:00 → BOI 2026-12-31 12:25:00.

2026-12-21 → 2026-12-31 · $280.50

  • Alaska Airlines AS2123: BOI 2026-12-21 18:21:00 → SEA 2026-12-21 18:57:00; nonstop; 96 minutes. Local airport times.
  • Alaska Airlines AS2344: SEA 2026-12-31 11:51:00 → BOI 2026-12-31 14:18:00; nonstop; 87 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $306.00

  • Delta Air Lines DL3688: BOI 2026-12-21 18:09:00 → SEA 2026-12-21 19:05:00; nonstop; 116 minutes. Local airport times.
  • Delta Air Lines DL3688: SEA 2026-12-31 16:47:00 → BOI 2026-12-31 19:17:00; nonstop; 90 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $326.00

  • Alaska Airlines AS2498 / AS423: BOI 2026-12-21 13:00:00 → SEA 2026-12-21 17:53:00; 1 stop(s) via GEG; 353 minutes. Local airport times.
    • AS2498: BOI 2026-12-21 13:00:00 → GEG 2026-12-21 13:10:00; layover at GEG: 207 minutes.
    • AS423: GEG 2026-12-21 16:37:00 → SEA 2026-12-21 17:53:00.
  • Alaska Airlines AS2344: SEA 2026-12-31 11:51:00 → BOI 2026-12-31 14:18:00; nonstop; 87 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $326.00

  • Alaska Airlines AS3015 / AS2240: BOI 2026-12-21 13:13:00 → SEA 2026-12-21 18:45:00; 1 stop(s) via PDX; 392 minutes. Local airport times.
    • AS3015: BOI 2026-12-21 13:13:00 → PDX 2026-12-21 13:48:00; layover at PDX: 237 minutes.
    • AS2240: PDX 2026-12-21 17:45:00 → SEA 2026-12-21 18:45:00.
  • Alaska Airlines AS2344: SEA 2026-12-31 11:51:00 → BOI 2026-12-31 14:18:00; nonstop; 87 minutes. Local airport times.

More dates for this route