Boise to Seattle (BOI-SEA): nonstop upgrade & award space

Alaska Airlines and Delta Air Lines fly nonstop between Boise (BOI) and Seattle (SEA), roughly 132 times a week. With Alaska Airlines running most of the schedule, the shape of a week is predictable, which makes an open premium seat on a given date easy to spot and quick to lose. 2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines, on every BOI to SEA departure, so you know which flights have space before you book.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

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132
Nonstop flights a week
398 mi
Nonstop distance
Free
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Boise to Seattle flight schedule

Scheduled nonstop departures for BOI to SEA, last checked against our schedule feed on September 6, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Boise (BOI) to Seattle (SEA)
Date Flight Airline Departs BOI Arrives SEA Duration Aircraft
AS 423Alaska Airlines, Inc.06:2307:001h 37m73H
AS 739Alaska Airlines, Inc.06:2307:021h 39m7M8
DL 3775Delta Air Lines06:4507:351h 50mE7W
AS 345Alaska Airlines, Inc.08:0308:421h 39m73J
AS 2070Alaska Airlines, Inc.08:1508:501h 35mE75
DL 3740Delta Air Lines08:5509:501h 55mE7W
AS 2166Alaska Airlines, Inc.10:0010:341h 34mE75
AS 2347Alaska Airlines, Inc.10:0010:371h 37mE75
DL 3750Delta Air Lines10:3411:261h 52mE7W
DL 3678Delta Air Lines12:1713:021h 45mE7W
AS 2231Alaska Airlines, Inc.13:0613:401h 34mE75
AS 2242Alaska Airlines, Inc.13:1513:491h 34mE75
AS 595Alaska Airlines, Inc.14:1614:521h 36m73J
DL 3916Delta Air Lines15:2816:101h 42mE7W
AS 565Alaska Airlines, Inc.16:2016:561h 36m73H
DL 4127Delta Air Lines17:5918:411h 42mE7W
AS 296Alaska Airlines, Inc.18:1318:531h 40m73H
AS 2352Alaska Airlines, Inc.19:4820:221h 34mE75
AS 423Alaska Airlines, Inc.06:2307:001h 37m73H
AS 739Alaska Airlines, Inc.06:2307:021h 39m7M8
DL 3775Delta Air Lines06:4507:351h 50mE7W
AS 345Alaska Airlines, Inc.08:0308:421h 39m7M9
AS 2070Alaska Airlines, Inc.08:1508:501h 35mE75
DL 3740Delta Air Lines08:5509:501h 55mE7W
AS 2166Alaska Airlines, Inc.10:0010:341h 34mE75
AS 2347Alaska Airlines, Inc.10:0010:371h 37mE75
DL 3750Delta Air Lines10:3411:261h 52mE7W
DL 3678Delta Air Lines12:1713:021h 45mE7W
AS 2242Alaska Airlines, Inc.13:1513:491h 34mE75
AS 595Alaska Airlines, Inc.14:1714:531h 36m73H
DL 3916Delta Air Lines15:2816:101h 42mE7W
DL 3959Delta Air Lines16:0516:461h 41mE7W
AS 565Alaska Airlines, Inc.16:2016:561h 36m73H
DL 4127Delta Air Lines17:5918:411h 42mE7W
AS 296Alaska Airlines, Inc.18:1318:531h 40m73H
AS 2352Alaska Airlines, Inc.19:4820:221h 34mE75
AS 423Alaska Airlines, Inc.06:2307:001h 37m73H
AS 739Alaska Airlines, Inc.06:2307:021h 39m7M8
DL 3775Delta Air Lines06:4507:351h 50mE7W
AS 345Alaska Airlines, Inc.08:0308:421h 39m73J

Showing the first 40 of 125 scheduled BOI to SEA departures across the next 7 days with service. Every remaining date is on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every BOI to SEA date on the interactive map

Confirmed upgrade & award space on BOI to SEA departures

2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines, segment by segment and date by date. Open the calendar for Boise to Seattle to see which departures have space, the next 14 days free on every product and the full horizon on Pro.

See real availability

Confirmed upgrade and award seats on each BOI to SEA departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See BOI to SEA on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Boise to Seattle nonstop

Carriers operating BOI to SEA nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

See BOI to SEA on the interactive map →

Frequently asked questions about BOI to SEA

How far is Seattle from Boise?
BOI to SEA covers about 398 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from BOI to SEA?
Alaska Airlines and Delta Air Lines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines.
How many flights a week are there from BOI to SEA?
About 132 nonstop flights a week run between Boise and Seattle in the current schedule, operated by Alaska Airlines and Delta Air Lines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from BOI to SEA depart?
Scheduled BOI to SEA nonstops in the next 7 days with service leave between 06:23 and 19:48, local time at Boise. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
How do I check upgrade or award availability on BOI to SEA?
Open the BOI to SEA route on the interactive map or the matrix to see confirmed upgrade and award space by date on Alaska Airlines and Delta Air Lines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens.

Never miss BOI to SEA upgrade or award space

See what is open by date on this route, the next 14 days free on every product and the full horizon on Pro.

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