€122 Cheap Flights Seattle to Boston (SEA-BOS)

View €122 flight on Sat, 9 May 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Logan International Airport (BOS)

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Cheap flights from Seattle to Boston (SEA-BOS)

Prices were available within the past 7 days and start at €122 for one-way flights and €244 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Tue, 19 May - Tue, 26 May
SEA
Seattle
BOS
Boston
€244 Return, found 13 hours ago
€244
Return
found 13 hours ago
Select JetBlue Airways flight, departing Tue, 19 May from Seattle to Boston, returning Tue, 26 May, priced at €244 found 13 hours ago
American Airlines
Tue, 19 May - Tue, 26 May
SEA
Seattle
BOS
Boston
€245 Return, found 13 hours ago
€245
Return
found 13 hours ago
Select American Airlines flight, departing Tue, 19 May from Seattle to Boston, returning Tue, 26 May, priced at €245 found 13 hours ago
American Airlines
Wed, 23 Sept - Tue, 29 Sept
SEA
Seattle
BOS
Boston
€248 Return, found 1 day ago
€248
Return
found 1 day ago
Select American Airlines flight, departing Wed, 23 Sept from Seattle to Boston, returning Tue, 29 Sept, priced at €248 found 1 day ago
Delta
Tue, 19 May - Tue, 26 May
SEA
Seattle
BOS
Boston
€248 Return, found 13 hours ago
€248
Return
found 13 hours ago
Select Delta flight, departing Tue, 19 May from Seattle to Boston, returning Tue, 26 May, priced at €248 found 13 hours ago
American Airlines
Tue, 19 May - Tue, 26 May
SEA
Seattle
BOS
Boston
€252 Return, found 13 hours ago
€252
Return
found 13 hours ago
Select American Airlines flight, departing Tue, 19 May from Seattle to Boston, returning Tue, 26 May, priced at €252 found 13 hours ago
Delta
Sat, 9 May - Sat, 16 May
SEA
Seattle
BOS
Boston
€252 Return, found 3 hours ago
€252
Return
found 3 hours ago
Select Delta flight, departing Sat, 9 May from Seattle to Boston, returning Sat, 16 May, priced at €252 found 3 hours ago
American Airlines
Thu, 28 May - Wed, 3 Jun
SEA
Seattle
BOS
Boston
€253 Return, found 4 hours ago
€253
Return
found 4 hours ago
Select American Airlines flight, departing Thu, 28 May from Seattle to Boston, returning Wed, 3 Jun, priced at €253 found 4 hours ago
American Airlines
Thu, 28 May - Wed, 3 Jun
SEA
Seattle
BOS
Boston
€256 Return, found 4 hours ago
€256
Return
found 4 hours ago
Select American Airlines flight, departing Thu, 28 May from Seattle to Boston, returning Wed, 3 Jun, priced at €256 found 4 hours ago
American Airlines
Thu, 28 May - Wed, 3 Jun
SEA
Seattle
BOS
Boston
€260 Return, found 4 hours ago
€260
Return
found 4 hours ago
Select American Airlines flight, departing Thu, 28 May from Seattle to Boston, returning Wed, 3 Jun, priced at €260 found 4 hours ago
United
Wed, 23 Sept - Tue, 29 Sept
SEA
Seattle
BOS
Boston
€337 Return, found 1 day ago
€337
Return
found 1 day ago
Select United flight, departing Wed, 23 Sept from Seattle to Boston, returning Tue, 29 Sept, priced at €337 found 1 day ago

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

May is typically the cheapest month to fly

From €172 - €292 per traveller.

Frequently asked questions

How much is a flight from SEA to Logan Intl. Airport (BOS)?
If you're travelling from Sea-Tac Airport to BOS, round-trip flights start from €244. This figure is based on fares listed within the last 7 days on Expedia for flights departing within the next year, so don't wait around. Book today and save yourself both money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Seattle - Tacoma Intl. Airport (SEA) to BOS?
We get that your situation can change unexpectedly, so we've made it as hassle-free as possible for you to cancel your flight online. Just head to the Customer Service Portal and follow the instructions.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport (BOS) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to Logan Intl. Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Sea-Tac Airport to Logan Intl. Airport?
With around 4,000 kilometres separating Sea-Tac Airport and Logan Intl. Airport, your flight will be a long one. Pack wisely to make your time in the air more comfortable. Simple things like an eye mask and a quality neck pillow can make a massive difference.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Logan Intl. Airport?
A popular airline that operates on the route from SEA to Logan Intl. Airport (BOS) is Alaska Airlines (AS). It offers 117 flights a month. Like some more options? Check out the airfares with Delta Air Lines (DL). This carrier offers 78 monthly flights between these airports.
Are Sea-Tac Airport to BOS flight tickets cheaper when they're purchased at the last minute?
It is possible to nab great last-minute deals from Sea-Tac Airport to BOS, but there's no guarantee. As many airlines advertise prices up to a year in advance, it's worth keeping an eye on fares early and being ready to pounce when you spot a bargain. Expedia compares air carrier prices and updates flight deals all the time, so you can feel confident knowing you're always getting the latest offers.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Logan Intl.
Airlines serving
American Airlines, Delta, JetBlue Airways, United
Return price
€243
Distance
3980 km
Average flight time
8 hours 23 mins

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