NT$4,677 Cheap Flights from Boston (BOS) to Seattle (SEA)

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

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Cheap Flights from Boston to Seattle (BOS-SEA)

Prices were available within the past 7 days and start at NT$4,677 for one-way flights and NT$10,455 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, May 19 - Fri, May 22
BOS
Boston
SEA
Seattle
NT$10,455 Roundtrip, found 1 day ago
NT$10,455
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, May 19 from Boston to Seattle, returning Fri, May 22, priced at NT$10,455 found 1 day ago
Delta
Tue, May 19 - Fri, May 22
BOS
Boston
SEA
Seattle
NT$11,243 Roundtrip, found 1 day ago
NT$11,243
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, May 19 from Boston to Seattle, returning Fri, May 22, priced at NT$11,243 found 1 day ago
Delta
Tue, Jun 30 - Sat, Jul 4
BOS
Boston
SEA
Seattle
NT$11,349 Roundtrip, found 3 days ago
NT$11,349
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Jun 30 from Boston to Seattle, returning Sat, Jul 4, priced at NT$11,349 found 3 days ago
American Airlines
Tue, Jun 30 - Sat, Jul 4
BOS
Boston
SEA
Seattle
NT$11,729 Roundtrip, found 3 days ago
NT$11,729
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Jun 30 from Boston to Seattle, returning Sat, Jul 4, priced at NT$11,729 found 3 days ago
American Airlines
Tue, Jun 30 - Sat, Jul 4
BOS
Boston
SEA
Seattle
NT$12,677 Roundtrip, found 3 days ago
NT$12,677
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Jun 30 from Boston to Seattle, returning Sat, Jul 4, priced at NT$12,677 found 3 days ago
Delta
Tue, May 19 - Fri, May 22
BOS
Boston
SEA
Seattle
NT$12,976 Roundtrip, found 1 day ago
NT$12,976
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, May 19 from Boston to Seattle, returning Fri, May 22, priced at NT$12,976 found 1 day ago
Delta
Tue, May 19 - Fri, May 22
BOS
Boston
SEA
Seattle
NT$13,135 Roundtrip, found 1 day ago
NT$13,135
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, May 19 from Boston to Seattle, returning Fri, May 22, priced at NT$13,135 found 1 day ago
United
Tue, Jun 30 - Sat, Jul 4
BOS
Boston
SEA
Seattle
NT$13,308 Roundtrip, found 3 days ago
NT$13,308
Roundtrip
found 3 days ago
Select United flight, departing Tue, Jun 30 from Boston to Seattle, returning Sat, Jul 4, priced at NT$13,308 found 3 days ago
Delta
Tue, May 19 - Fri, May 22
BOS
Boston
SEA
Seattle
NT$13,763 Roundtrip, found 1 day ago
NT$13,763
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, May 19 from Boston to Seattle, returning Fri, May 22, priced at NT$13,763 found 1 day ago
Delta
Tue, May 19 - Fri, May 22
BOS
Boston
SEA
Seattle
NT$14,079 Roundtrip, found 1 day ago
NT$14,079
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, May 19 from Boston to Seattle, returning Fri, May 22, priced at NT$14,079 found 1 day ago

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

April is typically the cheapest month to fly

From NT$6,300 - NT$15,795 per traveler.

Frequently asked questions

How much is a flight from Logan Intl. Airport to SEA?
If you're planning on traveling between Logan Intl. Airport (BOS) and Sea-Tac Airport, round-trip journeys start from NT$10,455. This price is based on fares available within the last 7 days on Expedia for flights departing within the next year, so don't delay. Book today and save yourself 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 BOS to SEA?
The majority of flights can be canceled online, but whether you are charged a fee differs between airlines. If you do have to cancel your trip, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Logan Intl. Airport to SEA 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 Logan Intl. Airport (BOS) to Seattle - Tacoma Intl. Airport (SEA) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Logan Intl. Airport to Sea-Tac Airport?
With around 4,000 kilometers separating Boston and SeaTac, your flight will be a long one. Pack wisely to make your time on board more comfortable. Things like a sleep mask and some noise-canceling headphones can make all the difference.
Which airlines fly direct from BOS to Seattle - Tacoma Intl. Airport (SEA)?
With 117 flights every month operating from Logan Intl. Airport to Sea-Tac Airport, Alaska Airlines (AS) is a popular choice. Love some more options? Check out the airfares with Delta Air Lines (DL). This carrier offers 78 flights a month between these airports.
Are Logan Intl. Airport to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute?
Late planners can sometimes pick up a bargain, with some super cheap fares from Logan Intl. Airport to Sea-Tac Airport arising a few weeks prior to the departure date. If you'd rather book ahead of time, Expedia compares and updates all the best flight deals continuously — as early as a year in advance in some cases. It does depend on the carrier though, as not all airlines advertise prices that far in advance.

Travel information

Origin airport
Logan Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
NT$10,455
Distance
3980 km
Average flight time
4 hours 35 mins

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