Boston to Seattle Flights (BOS-SEA) from $105

Selected fares from Boston to Seattle

The cheapest prices found with in the last 7 days for return flights were $212 and $105 for one-way flights to Seattle for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, May 3 - Tue, May 7

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$212 Roundtrip, found 19 hours ago

$212

Roundtrip

found 19 hours ago

Select Alaska Airlines flight, departing Fri, May 3 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, May 7, priced at $212 found 19 hours ago

Tue, Apr 30 - Sat, May 11

ORH

Worcester Regional

SEA

Seattle - Tacoma Intl.

$255 Roundtrip, found 6 days ago

$255

Roundtrip

found 6 days ago

Select Delta flight, departing Tue, Apr 30 from Worcester Regional to Seattle - Tacoma Intl., returning Sat, May 11, priced at $255 found 6 days ago

Tue, Aug 27 - Wed, Aug 28

PVD

T.F. Green

SEA

Seattle - Tacoma Intl.

$320 Roundtrip, found 2 days ago

$320

Roundtrip

found 2 days ago

Select Delta flight, departing Tue, Aug 27 from T.F. Green to Seattle - Tacoma Intl., returning Wed, Aug 28, priced at $320 found 2 days ago