$154 Cheap Alaska Airlines flights Boston (BOS) to Seattle (SEA)

View $154 flight on Wed, Jun 3, 2026Opens in a new window

$154 Cheap Alaska Airlines flights Boston (BOS) to Seattle (SEA)

Prices were available within the past 7 days and start at $154 for one-way flights and $337 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Thu, Sep 10 - Tue, Sep 15
BOS
Boston
SEA
Seattle
$337 Roundtrip, found 6 days ago
$337
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Sep 10 from Boston to Seattle, returning Tue, Sep 15, priced at $337 found 6 days ago
Alaska Airlines
Wed, Sep 9 - Sun, Sep 20
BOS
Boston
SEA
Seattle
$387 Roundtrip, found 3 hours ago
$387
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Wed, Sep 9 from Boston to Seattle, returning Sun, Sep 20, priced at $387 found 3 hours ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $400
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $400

Travel information

Origin airport
Logan Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, Southwest Airlines, Sun Country Airlines, United
Popular airline
American Airlines
Distance
3980 km
Average flight time
4 hours 17 mins

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