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

Alaska Airlines and Delta Air Lines fly nonstop between Seattle (SEA) and Boise (BOI), roughly 116 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 SEA to BOI 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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116
Nonstop flights a week
398 mi
Nonstop distance
Free
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Seattle to Boise flight schedule

Scheduled nonstop departures for SEA to BOI, 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 Seattle (SEA) to Boise (BOI)
Date Flight Airline Departs SEA Arrives BOI Duration Aircraft
AS 248Alaska Airlines, Inc.07:1509:561h 41m73H
DL 3750Delta Air Lines07:1509:541h 39mE7W
DL 3678Delta Air Lines08:5911:371h 38mE7W
AS 597Alaska Airlines, Inc.09:5512:351h 40m7M9
AS 2106Alaska Airlines, Inc.11:4314:221h 39mE75
DL 3959Delta Air Lines12:3915:161h 37mE7W
AS 467Alaska Airlines, Inc.12:5715:241h 27m7M9
DL 4127Delta Air Lines14:4517:191h 34mE7W
AS 2277Alaska Airlines, Inc.15:4118:071h 26mE75
AS 2061Alaska Airlines, Inc.15:4518:111h 26mE75
DL 3688Delta Air Lines16:0418:401h 36mE7W
AS 2109Alaska Airlines, Inc.17:4020:071h 27mE75
AS 586Alaska Airlines, Inc.18:0520:351h 30m73J
DL 3692Delta Air Lines19:5922:341h 35mE7W
AS 2262Alaska Airlines, Inc.21:1823:441h 26mE75
AS 248Alaska Airlines, Inc.07:1509:561h 41m7M8
DL 3750Delta Air Lines07:1509:541h 39mE7W
DL 3678Delta Air Lines08:5911:371h 38mE7W
AS 597Alaska Airlines, Inc.09:5512:351h 40m73J
AS 2106Alaska Airlines, Inc.11:4314:221h 39mE75
DL 3959Delta Air Lines12:3915:161h 37mE7W
AS 467Alaska Airlines, Inc.13:0315:301h 27m7M8
DL 4127Delta Air Lines14:4517:191h 34mE7W
AS 2277Alaska Airlines, Inc.15:4118:071h 26mE75
AS 2061Alaska Airlines, Inc.15:4518:111h 26mE75
DL 3688Delta Air Lines16:0418:401h 36mE7W
AS 2109Alaska Airlines, Inc.17:4020:071h 27mE75
AS 586Alaska Airlines, Inc.18:0320:331h 30m73H
AS 2034Alaska Airlines, Inc.19:5922:241h 25mE75
DL 3692Delta Air Lines19:5922:341h 35mE7W
AS 1314Alaska Airlines, Inc.20:0822:381h 30m7M8
AS 2262Alaska Airlines, Inc.21:1823:441h 26mE75
DL 4090Delta Air Lines21:2523:591h 34mE7W
AS 248Alaska Airlines, Inc.07:1509:561h 41m73H
DL 3750Delta Air Lines07:1509:541h 39mE7W
DL 3678Delta Air Lines08:5911:371h 38mE7W
AS 597Alaska Airlines, Inc.09:5512:351h 40m73H
AS 2106Alaska Airlines, Inc.11:4314:221h 39mE75
DL 3959Delta Air Lines12:3915:161h 37mE7W
AS 467Alaska Airlines, Inc.13:0315:301h 27m7M9

Showing the first 40 of 113 scheduled SEA to BOI 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 SEA to BOI date on the interactive map

Confirmed upgrade & award space on SEA to BOI 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 Seattle to Boise 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 SEA to BOI 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 SEA to BOI on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Seattle to Boise nonstop

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

See SEA to BOI on the interactive map →

Frequently asked questions about SEA to BOI

How far is Boise from Seattle?
SEA to BOI 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 SEA to BOI?
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 SEA to BOI?
About 116 nonstop flights a week run between Seattle and Boise 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 SEA to BOI depart?
Scheduled SEA to BOI nonstops in the next 7 days with service leave between 07:15 and 21:25, local time at Seattle. 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 SEA to BOI?
Open the SEA to BOI 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 SEA to BOI 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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