£120 Cheap Alaska Airlines flights from Boston to Seattle (BOS→SEA)

View £120 flight on Sat, 7 Nov 2026Opens in a new window

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Alaska Airlines flights from Boston to Seattle (BOS→SEA)

Prices were available within the past 7 days and start at £120 for one-way flights and £225 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, 7 Nov - Sat, 14 Nov
BOS
Boston
SEA
Seattle
£225 Return, found 6 days ago
£225
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 7 Nov from Boston to Seattle, returning Sat, 14 Nov, priced at £225 found 6 days ago
Alaska Airlines
Sat, 7 Nov - Sat, 14 Nov
BOS
Boston
SEA
Seattle
£232 Return, found 6 days ago
£232
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 7 Nov from Boston to Seattle, returning Sat, 14 Nov, priced at £232 found 6 days ago
Alaska Airlines
Sat, 7 Nov - Sat, 14 Nov
BOS
Boston
SEA
Seattle
£240 Return, found 6 days ago
£240
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 7 Nov from Boston to Seattle, returning Sat, 14 Nov, priced at £240 found 6 days ago
Alaska Airlines
Tue, 9 Jun - Tue, 16 Jun
BOS
Boston
SEA
Seattle
£262 Return, found 6 days ago
£262
Return
found 6 days ago
Select Alaska Airlines flight, departing Tue, 9 Jun from Boston to Seattle, returning Tue, 16 Jun, priced at £262 found 6 days ago
Alaska Airlines
Sat, 4 Jul - Wed, 8 Jul
BOS
Boston
SEA
Seattle
£279 Return, found 4 days ago
£279
Return
found 4 days ago
Select Alaska Airlines flight, departing Sat, 4 Jul from Boston to Seattle, returning Wed, 8 Jul, priced at £279 found 4 days ago
Alaska Airlines
Thu, 3 Sept - Sun, 6 Sept
BOS
Boston
SEA
Seattle
£309 Return, found 3 days ago
£309
Return
found 3 days ago
Select Alaska Airlines flight, departing Thu, 3 Sept from Boston to Seattle, returning Sun, 6 Sept, priced at £309 found 3 days ago

Find the cheapest month to fly from Boston (BOS) to Seattle (SEA)

April is typically the cheapest month to fly

From £175 - £456 per traveller.

Frequently asked questions

How much is an Alaska Airlines flight from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA)?
Make use of the "Price (lowest to highest)" filter on Expedia to search for cheap Alaska Airlines round-trip flights from £225 from BOS to SEA. Affordable one-way tickets from £120 are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from BOS to SEA with Alaska Airlines?
January is one of the cheapest months to jet off to Seattle with Alaska Airlines. You could also find great prices on one-way and return fares in February.
Does Alaska Airlines fly nonstop from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA)?
Alaska Airlines offers direct flights from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA), with 12 weekly departures. Simply apply the "Nonstop" and "Airline" filters while searching on Expedia to see all direct Alaska Airlines flights to SEA.
How long does it take to fly from BOS to SEA with Alaska Airlines?
It takes around 6h 38m to fly nonstop from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA) with Alaska Airlines.
Which day of the week has the most Alaska Airlines flights from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA)?
Alaska Airlines operates the most flights from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA) on Saturday. With up to 2 daily departures, you'll get the most options and flexibility on this day.
What airports does Alaska Airlines fly into in Seattle?
Alaska Airlines flights from Logan Intl. Airport (BOS) to Seattle come in to land at Seattle - Tacoma Intl. Airport (SEA). This is the main gateway here.
What type of plane does Alaska Airlines fly from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA)?
For the Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA) route, Alaska Airlines typically flies Boeing 737 MAX 9 and Boeing 737-800 planes. Don't forget that last-minute changes can occur for operational needs, meaning your flight may be on a different aircraft.
Can I change or cancel my Alaska Airlines flight from Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA)?
Changes are often free within 24 hours of making your booking, but your airline may charge a fee after that time. For further information about altering your reservation, go to your "Trips," select your flight and click on "Manage Booking." If you want the flexibility to adjust your plans without extra charges, apply the "No cancel fee" or "Changes included" filter when organising your next trip.

Travel information

Origin airport
Logan Intl.
Destination airport
Seattle - Tacoma Intl.
Distance
3980 km
Average flight time
4 hours 17 mins

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