An Alaska Airlines plane taking off with a snow-capped mountain in the background.

Flights from Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA)
Flights to Seattle
Washington
United States of America
Flights
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Popular airlines from Logan International Airport (BOS) to Seattle-Tacoma International Airport (SEA)

Alaska Airlines
JetBlue Airways
American Airlines
Delta
United
Southwest Airlines
Sun Country Airlines

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Cheap Flights from Boston to Seattle (BOS-SEA)

Prices were available within the past 7 days and start at NT$6,096 for one-way flights and NT$10,884 for roundtrip, for the period specified. Prices and availability are subject to change.

All deals

One way

Roundtrip

Fri, Oct 30 - Fri, Oct 30

BOS

Boston

SEA

Seattle

NT$10,884

Roundtrip

Found 19 hours ago

Select Alaska Airlines flight, departing Fri, Oct 30 from Boston to Seattle, returning Fri, Oct 30, priced at NT$10,884 Found 19 hours ago

Tue, Oct 27 - Tue, Nov 3

BOS

Boston

SEA

Seattle

NT$11,201

Roundtrip

Found 19 hours ago

Select Alaska Airlines flight, departing Tue, Oct 27 from Boston to Seattle, returning Tue, Nov 3, priced at NT$11,201 Found 19 hours ago

Thu, Oct 29 - Tue, Nov 3

BOS

Boston

SEA

Seattle

NT$12,494

Roundtrip

Found 19 hours ago

Select Alaska Airlines flight, departing Thu, Oct 29 from Boston to Seattle, returning Tue, Nov 3, priced at NT$12,494 Found 19 hours ago

Mon, Oct 26 - Tue, Nov 3

BOS

Boston

SEA

Seattle

NT$12,661

Roundtrip

Found 19 hours ago

Select Alaska Airlines flight, departing Mon, Oct 26 from Boston to Seattle, returning Tue, Nov 3, priced at NT$12,661 Found 19 hours ago

Tue, Sep 1 - Fri, Sep 4

BOS

Boston

SEA

Seattle

NT$12,719

Roundtrip

Found 2 days ago

Select Delta flight, departing Tue, Sep 1 from Boston to Seattle, returning Fri, Sep 4, priced at NT$12,719 Found 2 days ago

Thu, Oct 29 - Sun, Nov 1

BOS

Boston

SEA

Seattle

NT$13,475

Roundtrip

Found 19 hours ago

Select Delta flight, departing Thu, Oct 29 from Boston to Seattle, returning Sun, Nov 1, priced at NT$13,475 Found 19 hours ago

Sun, Nov 1 - Tue, Nov 3

BOS

Boston

SEA

Seattle

NT$13,631

Roundtrip

Found 19 hours ago

Select Alaska Airlines flight, departing Sun, Nov 1 from Boston to Seattle, returning Tue, Nov 3, priced at NT$13,631 Found 19 hours ago

Thu, Oct 29 - Sun, Nov 1

BOS

Boston

SEA

Seattle

NT$13,641

Roundtrip

Found 19 hours ago

Select United flight, departing Thu, Oct 29 from Boston to Seattle, returning Sun, Nov 1, priced at NT$13,641 Found 19 hours ago

Mon, Oct 26 - Thu, Oct 29

BOS

Boston

SEA

Seattle

NT$13,787

Roundtrip

Found 19 hours ago

Select American Airlines flight, departing Mon, Oct 26 from Boston to Seattle, returning Thu, Oct 29, priced at NT$13,787 Found 19 hours ago

Sun, Nov 1 - Sun, Nov 1

BOS

Boston

SEA

Seattle

NT$13,792

Roundtrip

Found 19 hours ago

Select Alaska Airlines flight, departing Sun, Nov 1 from Boston to Seattle, returning Sun, Nov 1, priced at NT$13,792 Found 19 hours ago

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

September is typically the cheapest month to fly

From NT$7,986 - NT$10,803 per traveler.

Travel information

Origin airport	Logan International Airport
Destination airport	Seattle-Tacoma International Airport
Distance	4,003 km away
Airlines serving	Alaska Airlines, JetBlue Airways, American Airlines, Delta, United, Southwest Airlines, Sun Country Airlines
Popular airline	Alaska Airlines
Roundtrip price	NT$10,884
Average flight time	7 hours 24 mins

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NT$6,096 Cheap Flights from Boston (BOS) to Seattle (SEA)

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

Be in the know

Book smarter

Earn twice

Cheap Flights from Boston to Seattle (BOS-SEA)

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

September is typically the cheapest month to flySeptember is typically the cheapest month to fly

Travel information

Explore a world of travel with Expedia

September is typically the cheapest month to fly