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

Alaska Airlines and Delta Air Lines fly nonstop between Seattle (SEA) and Boise (BOI), roughly 105 times a week. The timetable below shows the nonstop scheduled at 1h 25m to 1h 39m for the 398 miles. 2LNR checks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines flights on this route, so you can see which departures have space before you book.

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

Updated .

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105
Flights a week, 4-week average
1h 25m to 1h 39m
Scheduled flight time
398 mi
Nonstop distance
Free
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Seattle to Boise flight schedule

Scheduled nonstop departures for SEA to BOI starting October 23, 2026, last checked against our schedule feed on October 18, 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
DL 3750Delta Air Lines07:1509:541h 39mEmbraer E175
AS 248Alaska Airlines, Inc.07:1709:561h 39mBoeing 737-700
DL 3678Delta Air Lines08:5911:271h 28mEmbraer E175
DL 3817Delta Air Lines09:3012:061h 36mEmbraer E175
AS 357Alaska Airlines, Inc.09:5712:351h 38mBoeing 737 MAX 9
AS 3211Alaska Airlines, Inc.11:2013:501h 30mEmbraer E175
DL 3959Delta Air Lines12:4715:201h 33mEmbraer E175
AS 467Alaska Airlines, Inc.12:4815:231h 35mBoeing 737-800
DL 4127Delta Air Lines14:4517:141h 29mEmbraer E175
AS 2169Alaska Airlines, Inc.15:5118:171h 26mEmbraer E175
DL 3688Delta Air Lines16:0218:331h 31mEmbraer E175
AS 2109Alaska Airlines, Inc.17:4020:061h 26mEmbraer E175
DL 3692Delta Air Lines19:3522:081h 33mEmbraer E175
AS 2173Alaska Airlines, Inc.19:4122:061h 25mEmbraer E175
AS 445Alaska Airlines, Inc.21:2923:591h 30mBoeing 737-800
DL 4090Delta Air Lines21:3023:591h 29mEmbraer E175
DL 3750Delta Air Lines07:1509:541h 39mEmbraer E175
AS 248Alaska Airlines, Inc.07:1709:561h 39mBoeing 737-800
DL 3678Delta Air Lines08:5911:271h 28mEmbraer E175
DL 3817Delta Air Lines09:3012:061h 36mEmbraer E175
AS 357Alaska Airlines, Inc.09:5712:351h 38mBoeing 737 MAX 9
AS 3211Alaska Airlines, Inc.11:3314:111h 38mEmbraer E175
DL 4127Delta Air Lines11:4514:221h 37mEmbraer E175
DL 3959Delta Air Lines12:4715:201h 33mEmbraer E175
AS 467Alaska Airlines, Inc.12:4815:231h 35mBoeing 737-800
AS 2169Alaska Airlines, Inc.15:5118:171h 26mEmbraer E175
DL 3688Delta Air Lines16:0218:331h 31mEmbraer E175
AS 2109Alaska Airlines, Inc.17:4020:061h 26mEmbraer E175
DL 3692Delta Air Lines19:3522:081h 33mEmbraer E175
AS 2173Alaska Airlines, Inc.19:4122:061h 25mEmbraer E175
AS 445Alaska Airlines, Inc.21:2923:591h 30mBoeing 737-800
DL 3750Delta Air Lines07:1509:541h 39mEmbraer E175
AS 248Alaska Airlines, Inc.07:1709:561h 39mBoeing 737-800
DL 3678Delta Air Lines08:5911:271h 28mEmbraer E175
DL 3817Delta Air Lines09:3012:061h 36mEmbraer E175
AS 357Alaska Airlines, Inc.09:5712:351h 38mBoeing 737-900
AS 3211Alaska Airlines, Inc.11:2013:501h 30mEmbraer E175
DL 4127Delta Air Lines11:4514:221h 37mEmbraer E175
DL 3959Delta Air Lines12:4715:201h 33mEmbraer E175
AS 467Alaska Airlines, Inc.12:4815:231h 35mBoeing 737-900

Showing the first 40 of 107 scheduled SEA to BOI departures across 7 days with service, starting October 23, 2026. 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 hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure.

See every SEA to BOI date on the interactive map

Aircraft on the Seattle to Boise nonstop

In the schedule table on this page, Delta Air Lines flies the Embraer E175, and Alaska Airlines flies the Embraer E175, the Boeing 737-800, the Boeing 737 MAX 9, the Boeing 737-900, and the Boeing 737-700. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

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.

In the 7 days to October 19, 2026, 2LNR checked award space on Seattle to Boise departures from October 19 to November 1. Alaska Airlines had space open on 14 of 14 dates checked and Delta Air Lines on 14 of 14.

See real availability

Confirmed upgrade or award seats by date on the SEA to BOI departures 2LNR tracks, checked against live inventory so you know what's open before you book.

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Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're 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. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date.

See SEA to BOI on the interactive map →

Frequently asked questions about SEA to BOI

How long is the flight from Seattle (SEA) to Boise (BOI)?
Scheduled flight times from Seattle (SEA) to Boise (BOI) run from 1h 25m to 1h 39m across the departures in the schedule table on this page. The nonstop covers about 398 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.
Which airlines fly nonstop from SEA to BOI?
Alaska Airlines and Delta Air Lines fly SEA to BOI 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 105 nonstop flights a week run between Seattle (SEA) and Boise (BOI) 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 21:30, local time at Seattle. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Which flights operate SEA to BOI nonstop?
The schedule table on this page lists 16 flight numbers for SEA to BOI nonstops, including AS 248, AS 357, AS 467, and AS 3211 on Alaska Airlines, and DL 3678, DL 3750, DL 3817, and DL 3959 on Delta Air Lines. The table lists each departure by date with its times 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.

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

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