--- title: "Seattle (SEA) to Boise (BOI) flights: who flies it" description: "Alaska Airlines and Delta Air Lines fly nonstop from SEA to BOI, about 105 flights a week, covering 398 miles. Upgrade and award space by date on 2LNR, next 14 days free." canonical: "https://2lnr.com/routes/sea-boi" url: "https://2lnr.com/routes/sea-boi.md" date_modified: "2026-10-18T05:10:47Z" --- # 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 October 18, 2026. Departure times come from 2LNR's schedule data; confirm with the airline before you book. Updated October 24, 2026. See SEA to BOI on the interactive map [Get started free](https://2lnr.com/login) 105 Flights a week, 4-week average 1h 25m to 1h 39m Scheduled flight time 398 mi Nonstop distance Free To get started ## 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. Scheduled nonstop departures from Seattle (SEA) to Boise (BOI) | Date | Flight | Airline | Departs SEA | Arrives BOI | Duration | Aircraft | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | Fri, Oct 23 | DL 3750 | Delta Air Lines | 07:15 | 09:54 | 1h 39m | [Embraer E175](https://2lnr.com/seatmaps/dl/e175.md) | | Fri, Oct 23 | AS 248 | Alaska Airlines, Inc. | 07:17 | 09:56 | 1h 39m | [Boeing 737-700](https://2lnr.com/seatmaps/as/737-700.md) | | Fri, Oct 23 | DL 3678 | Delta Air Lines | 08:59 | 11:27 | 1h 28m | Embraer E175 | | Fri, Oct 23 | DL 3817 | Delta Air Lines | 09:30 | 12:06 | 1h 36m | Embraer E175 | | Fri, Oct 23 | AS 357 | Alaska Airlines, Inc. | 09:57 | 12:35 | 1h 38m | [Boeing 737 MAX 9](https://2lnr.com/seatmaps/as/737-max-9.md) | | Fri, Oct 23 | AS 3211 | Alaska Airlines, Inc. | 11:20 | 13:50 | 1h 30m | [Embraer E175](https://2lnr.com/seatmaps/as/e175.md) | | Fri, Oct 23 | DL 3959 | Delta Air Lines | 12:47 | 15:20 | 1h 33m | Embraer E175 | | Fri, Oct 23 | AS 467 | Alaska Airlines, Inc. | 12:48 | 15:23 | 1h 35m | [Boeing 737-800](https://2lnr.com/seatmaps/as/737-800.md) | | Fri, Oct 23 | DL 4127 | Delta Air Lines | 14:45 | 17:14 | 1h 29m | Embraer E175 | | Fri, Oct 23 | AS 2169 | Alaska Airlines, Inc. | 15:51 | 18:17 | 1h 26m | Embraer E175 | | Fri, Oct 23 | DL 3688 | Delta Air Lines | 16:02 | 18:33 | 1h 31m | Embraer E175 | | Fri, Oct 23 | AS 2109 | Alaska Airlines, Inc. | 17:40 | 20:06 | 1h 26m | Embraer E175 | | Fri, Oct 23 | DL 3692 | Delta Air Lines | 19:35 | 22:08 | 1h 33m | Embraer E175 | | Fri, Oct 23 | AS 2173 | Alaska Airlines, Inc. | 19:41 | 22:06 | 1h 25m | Embraer E175 | | Fri, Oct 23 | AS 445 | Alaska Airlines, Inc. | 21:29 | 23:59 | 1h 30m | Boeing 737-800 | | Fri, Oct 23 | DL 4090 | Delta Air Lines | 21:30 | 23:59 | 1h 29m | Embraer E175 | | Sat, Oct 24 | DL 3750 | Delta Air Lines | 07:15 | 09:54 | 1h 39m | Embraer E175 | | Sat, Oct 24 | AS 248 | Alaska Airlines, Inc. | 07:17 | 09:56 | 1h 39m | Boeing 737-800 | | Sat, Oct 24 | DL 3678 | Delta Air Lines | 08:59 | 11:27 | 1h 28m | Embraer E175 | | Sat, Oct 24 | DL 3817 | Delta Air Lines | 09:30 | 12:06 | 1h 36m | Embraer E175 | | Sat, Oct 24 | AS 357 | Alaska Airlines, Inc. | 09:57 | 12:35 | 1h 38m | Boeing 737 MAX 9 | | Sat, Oct 24 | AS 3211 | Alaska Airlines, Inc. | 11:33 | 14:11 | 1h 38m | Embraer E175 | | Sat, Oct 24 | DL 4127 | Delta Air Lines | 11:45 | 14:22 | 1h 37m | Embraer E175 | | Sat, Oct 24 | DL 3959 | Delta Air Lines | 12:47 | 15:20 | 1h 33m | Embraer E175 | | Sat, Oct 24 | AS 467 | Alaska Airlines, Inc. | 12:48 | 15:23 | 1h 35m | Boeing 737-800 | | Sat, Oct 24 | AS 2169 | Alaska Airlines, Inc. | 15:51 | 18:17 | 1h 26m | Embraer E175 | | Sat, Oct 24 | DL 3688 | Delta Air Lines | 16:02 | 18:33 | 1h 31m | Embraer E175 | | Sat, Oct 24 | AS 2109 | Alaska Airlines, Inc. | 17:40 | 20:06 | 1h 26m | Embraer E175 | | Sat, Oct 24 | DL 3692 | Delta Air Lines | 19:35 | 22:08 | 1h 33m | Embraer E175 | | Sat, Oct 24 | AS 2173 | Alaska Airlines, Inc. | 19:41 | 22:06 | 1h 25m | Embraer E175 | | Sat, Oct 24 | AS 445 | Alaska Airlines, Inc. | 21:29 | 23:59 | 1h 30m | Boeing 737-800 | | Sun, Oct 25 | DL 3750 | Delta Air Lines | 07:15 | 09:54 | 1h 39m | Embraer E175 | | Sun, Oct 25 | AS 248 | Alaska Airlines, Inc. | 07:17 | 09:56 | 1h 39m | Boeing 737-800 | | Sun, Oct 25 | DL 3678 | Delta Air Lines | 08:59 | 11:27 | 1h 28m | Embraer E175 | | Sun, Oct 25 | DL 3817 | Delta Air Lines | 09:30 | 12:06 | 1h 36m | Embraer E175 | | Sun, Oct 25 | AS 357 | Alaska Airlines, Inc. | 09:57 | 12:35 | 1h 38m | [Boeing 737-900](https://2lnr.com/seatmaps/as/737-900.md) | | Sun, Oct 25 | AS 3211 | Alaska Airlines, Inc. | 11:20 | 13:50 | 1h 30m | Embraer E175 | | Sun, Oct 25 | DL 4127 | Delta Air Lines | 11:45 | 14:22 | 1h 37m | Embraer E175 | | Sun, Oct 25 | DL 3959 | Delta Air Lines | 12:47 | 15:20 | 1h 33m | Embraer E175 | | Sun, Oct 25 | AS 467 | Alaska Airlines, Inc. | 12:48 | 15:23 | 1h 35m | Boeing 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](https://2lnr.com/seatmaps/dl/e175.md), and Alaska Airlines flies the [Embraer E175](https://2lnr.com/seatmaps/as/e175.md), the [Boeing 737-800](https://2lnr.com/seatmaps/as/737-800.md), the [Boeing 737 MAX 9](https://2lnr.com/seatmaps/as/737-max-9.md), the [Boeing 737-900](https://2lnr.com/seatmaps/as/737-900.md), and the [Boeing 737-700](https://2lnr.com/seatmaps/as/737-700.md). 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. ### Set an alert 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. - [Alaska Airlines (AS) route map](https://2lnr.com/routes/airlines/as.md)\ [The aircraft AS flies](https://2lnr.com/seatmaps/as.md) - [Delta Air Lines (DL) route map](https://2lnr.com/routes/airlines/dl.md)\ [The aircraft DL flies](https://2lnr.com/seatmaps/dl.md) 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. Flying the other way? See [BOI to SEA upgrade and award space](https://2lnr.com/routes/boi-sea.md). Award seats rather than schedules? See [Alaska Airlines award availability](https://2lnr.com/awards/as.md) or [Delta Air Lines award availability](https://2lnr.com/awards/dl.md). Looking beyond this route? See [every route from Seattle (SEA)](https://2lnr.com/routes/sea.md), or [every route from Boise (BOI)](https://2lnr.com/routes/boi.md). Nonstops to Boise (BOI) from other airports within 150 miles of Seattle (SEA): - [Portland (PDX) to Boise (BOI)](https://2lnr.com/routes/pdx-boi.md), 129 miles from SEA Nonstops from Seattle (SEA) to other airports within 150 miles of Boise (BOI): - [Seattle (SEA) to Hailey (SUN)](https://2lnr.com/routes/sea-sun.md), 97 miles from BOI Distances are great-circle between the airports, not driving distance. - [How Alaska upgrades clear](https://2lnr.com/about/as/upgrades.md) - [How to read award availability by date](https://2lnr.com/guides/award-availability.md) ## Never miss SEA to BOI upgrade or award space See what's open by date on this route, the next 14 days free on every product and the full horizon on Pro. [Get started free](https://2lnr.com/login)