Boston to Seattle Flights (BOS-SEA) from $128

Selected fares from Boston to Seattle

The cheapest prices found with in the last 7 days for return flights were $193 and $128 for one-way flights to Seattle for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, May 29 - Tue, Jun 4

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$193 Roundtrip, found 1 day ago

$193

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Wed, May 29 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Jun 4, priced at $193 found 1 day ago

Fri, May 31 - Sun, Jun 9

PVD

T.F. Green

SEA

Seattle - Tacoma Intl.

$313 Roundtrip, found 7 hours ago

$313

Roundtrip

found 7 hours ago

Select Sun Country Airlines flight, departing Fri, May 31 from T.F. Green to Seattle - Tacoma Intl., returning Sun, Jun 9, priced at $313 found 7 hours ago

Mon, Oct 21 - Sun, Oct 27

ORH

Worcester Regional

SEA

Seattle - Tacoma Intl.

$358 Roundtrip, found 2 days ago

$358

Roundtrip

found 2 days ago

Select Delta flight, departing Mon, Oct 21 from Worcester Regional to Seattle - Tacoma Intl., returning Sun, Oct 27, priced at $358 found 2 days ago