Flights from Boston to Seattle

Cheapest flights from Boston

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 4 - Tue, Sep 9

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$227 Roundtrip, found 4 days ago

$227

Roundtrip

found 4 days ago

Select JetBlue Airways flight, departing Thu, Sep 4 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Sep 9, priced at $227 found 4 days ago

Thu, Sep 4 - Tue, Sep 9

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$237 Roundtrip, found 4 days ago

$237

Roundtrip

found 4 days ago

Select United flight, departing Thu, Sep 4 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Sep 9, priced at $237 found 4 days ago

Thu, Aug 21 - Thu, Sep 4

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$242 Roundtrip, found 4 days ago

$242

Roundtrip

found 4 days ago

Select JetBlue Airways flight, departing Thu, Aug 21 from Logan Intl. to Seattle - Tacoma Intl., returning Thu, Sep 4, priced at $242 found 4 days ago

Thu, Sep 4 - Tue, Sep 9

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$247 Roundtrip, found 4 days ago

$247

Roundtrip

found 4 days ago

Select United flight, departing Thu, Sep 4 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Sep 9, priced at $247 found 4 days ago

Thu, Aug 21 - Thu, Sep 4

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$252 Roundtrip, found 4 days ago

$252

Roundtrip

found 4 days ago

Select JetBlue Airways flight, departing Thu, Aug 21 from Logan Intl. to Seattle - Tacoma Intl., returning Thu, Sep 4, priced at $252 found 4 days ago

Thu, Aug 21 - Thu, Sep 4

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$262 Roundtrip, found 4 days ago

$262

Roundtrip

found 4 days ago

Select United flight, departing Thu, Aug 21 from Logan Intl. to Seattle - Tacoma Intl., returning Thu, Sep 4, priced at $262 found 4 days ago

Thu, Aug 21 - Thu, Sep 4

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$267 Roundtrip, found 4 days ago

$267

Roundtrip

found 4 days ago

Select JetBlue Airways flight, departing Thu, Aug 21 from Logan Intl. to Seattle - Tacoma Intl., returning Thu, Sep 4, priced at $267 found 4 days ago

Tue, Aug 19 - Mon, Aug 25

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$272 Roundtrip, found 4 hours ago

$272

Roundtrip

found 4 hours ago

Select Alaska Airlines flight, departing Tue, Aug 19 from Logan Intl. to Seattle - Tacoma Intl., returning Mon, Aug 25, priced at $272 found 4 hours ago

Thu, Sep 4 - Tue, Sep 9

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$272 Roundtrip, found 4 days ago

$272

Roundtrip

found 4 days ago

Select American Airlines flight, departing Thu, Sep 4 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Sep 9, priced at $272 found 4 days ago

Thu, Sep 4 - Tue, Sep 9

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$277 Roundtrip, found 4 days ago

$277

Roundtrip

found 4 days ago

Select American Airlines flight, departing Thu, Sep 4 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Sep 9, priced at $277 found 4 days ago

Thu, Sep 4 - Tue, Sep 9

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$280 Roundtrip, found 4 days ago

$280

Roundtrip

found 4 days ago

Select United flight, departing Thu, Sep 4 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Sep 9, priced at $280 found 4 days ago

Thu, Sep 4 - Tue, Sep 9

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$281 Roundtrip, found 4 days ago

$281

Roundtrip

found 4 days ago

Select United flight, departing Thu, Sep 4 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Sep 9, priced at $281 found 4 days ago

Thu, Aug 21 - Thu, Sep 4

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$282 Roundtrip, found 4 days ago

$282

Roundtrip

found 4 days ago

Select American Airlines flight, departing Thu, Aug 21 from Logan Intl. to Seattle - Tacoma Intl., returning Thu, Sep 4, priced at $282 found 4 days ago

Thu, Sep 4 - Tue, Sep 9

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$285 Roundtrip, found 4 days ago

$285

Roundtrip

found 4 days ago

Select Sun Country Airlines flight, departing Thu, Sep 4 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Sep 9, priced at $285 found 4 days ago

Wed, Aug 20 - Mon, Aug 25

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$287 Roundtrip, found 4 hours ago

$287

Roundtrip

found 4 hours ago

Select Alaska Airlines flight, departing Wed, Aug 20 from Logan Intl. to Seattle - Tacoma Intl., returning Mon, Aug 25, priced at $287 found 4 hours ago

Thu, Sep 4 - Tue, Sep 9

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$287 Roundtrip, found 4 days ago

$287

Roundtrip

found 4 days ago

Select United flight, departing Thu, Sep 4 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Sep 9, priced at $287 found 4 days ago

Mon, Jul 14 - Tue, Jul 22

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$352 Roundtrip, found 6 hours ago

$352

Roundtrip

found 6 hours ago

Select Hawaiian Airlines flight, departing Mon, Jul 14 from Logan Intl. to Seattle - Tacoma Intl., returning Tue, Jul 22, priced at $352 found 6 hours ago

Mon, Jul 14 - Mon, Jul 21

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$352 Roundtrip, found 6 hours ago

$352

Roundtrip

found 6 hours ago

Select Delta flight, departing Mon, Jul 14 from Logan Intl. to Seattle - Tacoma Intl., returning Mon, Jul 21, priced at $352 found 6 hours ago

Wed, Jul 16 - Mon, Jul 21

BOS

Logan Intl.

SEA

Seattle - Tacoma Intl.

$643 Roundtrip, found 6 hours ago

$643

Roundtrip

found 6 hours ago

Select Sun Country Airlines flight, departing Wed, Jul 16 from Logan Intl. to Seattle - Tacoma Intl., returning Mon, Jul 21, priced at $643 found 6 hours ago

Thu, Jul 31 - Sat, Aug 9

BOS

Logan Intl.

PAE

Seattle Paine Field Intl. Airport

$685 Roundtrip, found 5 days ago

$685

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Thu, Jul 31 from Logan Intl. to Seattle Paine Field Intl. Airport, returning Sat, Aug 9, priced at $685 found 5 days ago