Boston to Seattle (BOS-SEA): nonstop upgrade & award space

Alaska Airlines, Delta Air Lines, and JetBlue Airways fly nonstop between Boston (BOS) and Seattle (SEA), roughly 50 times a week. The timetable below shows the nonstop scheduled at 6h 17m to 6h 25m for the 2,489 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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50
Flights a week, 4-week average
6h 17m to 6h 25m
Scheduled flight time
2,489 mi
Nonstop distance
Free
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Boston to Seattle flight schedule

Scheduled nonstop departures for BOS to SEA 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 Boston (BOS) to Seattle (SEA)
Date Flight Airline Departs BOS Arrives SEA Duration Aircraft
AS 459Alaska Airlines, Inc.07:0310:206h 17mBoeing 737-900
DL 384Delta Air Lines07:5511:206h 25mAirbus A321neo family
AS 215Alaska Airlines, Inc.09:0312:206h 17mBoeing 737 MAX 9
DL 332Delta Air Lines10:5014:126h 22mAirbus A321neo family
DL 2889Delta Air Lines15:4719:056h 18mAirbus A321neo family
AS 288Alaska Airlines, Inc.16:5820:176h 19mBoeing 737-900
AS 306Alaska Airlines, Inc.18:4021:596h 19mBoeing 737-900
B6 397JetBlue Airways19:2022:426h 22mAirbus A321
DL 797Delta Air Lines19:2522:496h 24mAirbus A321neo family
AS 459Alaska Airlines, Inc.07:0310:206h 17mBoeing 737 MAX 9
DL 384Delta Air Lines07:5511:206h 25mAirbus A321neo family
AS 215Alaska Airlines, Inc.09:0312:206h 17mBoeing 737 MAX 9
DL 332Delta Air Lines10:5014:126h 22mAirbus A321neo family
AS 288Alaska Airlines, Inc.16:5820:176h 19mBoeing 737-900
AS 306Alaska Airlines, Inc.18:4021:596h 19mBoeing 737-900
DL 797Delta Air Lines18:4222:056h 23mAirbus A321neo family
B6 397JetBlue Airways19:2822:486h 20mAirbus A321
AS 459Alaska Airlines, Inc.07:0310:206h 17mBoeing 737 MAX 9
DL 384Delta Air Lines07:5511:206h 25mAirbus A321neo family
AS 215Alaska Airlines, Inc.09:0312:206h 17mBoeing 737 MAX 9
DL 332Delta Air Lines10:5014:126h 22mAirbus A321neo family
DL 2889Delta Air Lines15:4719:056h 18mAirbus A321neo family
AS 288Alaska Airlines, Inc.16:5820:176h 19mBoeing 737 MAX 9
AS 306Alaska Airlines, Inc.18:4021:596h 19mBoeing 737-900
DL 797Delta Air Lines19:2522:496h 24mAirbus A321neo family
AS 459Alaska Airlines, Inc.07:0310:206h 17mBoeing 737-900
DL 384Delta Air Lines07:5511:206h 25mAirbus A321neo family
AS 215Alaska Airlines, Inc.09:0312:206h 17mBoeing 737 MAX 9
DL 332Delta Air Lines10:5014:126h 22mAirbus A321neo family
DL 2889Delta Air Lines15:4719:056h 18mAirbus A321neo family
AS 288Alaska Airlines, Inc.16:5820:176h 19mBoeing 737-900
AS 306Alaska Airlines, Inc.18:4021:596h 19mBoeing 737 MAX 9
DL 797Delta Air Lines19:2522:496h 24mAirbus A321neo family
AS 459Alaska Airlines, Inc.07:0310:206h 17mBoeing 737-900
DL 384Delta Air Lines07:5511:206h 25mAirbus A321neo family
AS 215Alaska Airlines, Inc.09:0312:206h 17mBoeing 737-800
DL 332Delta Air Lines10:5014:126h 22mAirbus A321neo family
DL 2889Delta Air Lines15:4719:056h 18mAirbus A321neo family
AS 288Alaska Airlines, Inc.16:5820:176h 19mBoeing 737 MAX 9
AS 306Alaska Airlines, Inc.18:4021:596h 19mBoeing 737 MAX 9

Showing the first 40 of 57 scheduled BOS to SEA 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 BOS to SEA date on the interactive map

Aircraft on the Boston to Seattle nonstop

In the schedule table on this page, Alaska Airlines flies the Boeing 737 MAX 9, the Boeing 737-900, and the Boeing 737-800. Delta Air Lines flies the Airbus A321neo family. JetBlue Airways flies the Airbus A321. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

Confirmed upgrade & award space on BOS 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 Boston to Seattle 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 Boston to Seattle departures from October 19 to November 1. Alaska Airlines had space open on 2 of 14 dates checked, Delta Air Lines on 14 of 14 and JetBlue Airways on 0 of 6.

See real availability

Confirmed upgrade or award seats by date on the BOS to SEA 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 BOS to SEA on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Boston to Seattle nonstop

Carriers operating BOS to SEA nonstop in the current schedule. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date.

See BOS to SEA on the interactive map →

Frequently asked questions about BOS to SEA

How long is the flight from Boston (BOS) to Seattle (SEA)?
Scheduled flight times from Boston (BOS) to Seattle (SEA) run from 6h 17m to 6h 25m across the departures in the schedule table on this page. The nonstop covers about 2,489 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.
Which airlines fly nonstop from BOS to SEA?
Alaska Airlines, Delta Air Lines, and JetBlue Airways fly BOS to SEA nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines, and award seats on JetBlue Airways.
How many flights a week are there from BOS to SEA?
About 50 nonstop flights a week run between Boston (BOS) and Seattle (SEA) in the current schedule, operated by Alaska Airlines, Delta Air Lines, and JetBlue Airways. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from BOS to SEA depart?
Scheduled BOS to SEA nonstops in the next 7 days with service leave between 07:03 and 19:28, local time at Boston. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Which flights operate BOS to SEA nonstop?
The schedule table on this page lists 9 flight numbers for BOS to SEA nonstops, including AS 215, AS 288, AS 306, and AS 459 on Alaska Airlines, and DL 332, DL 384, DL 797, and DL 2889 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 BOS to SEA?
Open the BOS 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 BOS to SEA 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.

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