Flights from Seattle to Billerica

Cheapest flights from Seattle

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.

Tue, Sep 9 - Sat, Sep 13

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$217 Roundtrip, found 1 day ago

$217

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Tue, Sep 9 from Seattle - Tacoma Intl. to Logan Intl., returning Sat, Sep 13, priced at $217 found 1 day ago

Wed, Oct 1 - Wed, Oct 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$217 Roundtrip, found 3 days ago

$217

Roundtrip

found 3 days ago

Select Delta flight, departing Wed, Oct 1 from Seattle - Tacoma Intl. to Logan Intl., returning Wed, Oct 15, priced at $217 found 3 days ago

Thu, Oct 16 - Wed, Oct 22

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$227 Roundtrip, found 1 day ago

$227

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Thu, Oct 16 from Seattle - Tacoma Intl. to Logan Intl., returning Wed, Oct 22, priced at $227 found 1 day ago

Wed, Sep 24 - Tue, Oct 14

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$237 Roundtrip, found 1 day ago

$237

Roundtrip

found 1 day ago

Select American Airlines flight, departing Wed, Sep 24 from Seattle - Tacoma Intl. to Logan Intl., returning Tue, Oct 14, priced at $237 found 1 day ago

Thu, Sep 4 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$237 Roundtrip, found 1 day ago

$237

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Thu, Sep 4 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $237 found 1 day ago

Tue, Aug 12 - Wed, Sep 3

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$242 Roundtrip, found 2 days ago

$242

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Tue, Aug 12 from Seattle - Tacoma Intl. to Logan Intl., returning Wed, Sep 3, priced at $242 found 2 days ago

Mon, Oct 13 - Fri, Oct 17

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$247 Roundtrip, found 1 day ago

$247

Roundtrip

found 1 day ago

Select JetBlue Airways flight, departing Mon, Oct 13 from Seattle - Tacoma Intl. to Logan Intl., returning Fri, Oct 17, priced at $247 found 1 day ago

Tue, Aug 12 - Thu, Sep 4

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$252 Roundtrip, found 2 days ago

$252

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Tue, Aug 12 from Seattle - Tacoma Intl. to Logan Intl., returning Thu, Sep 4, priced at $252 found 2 days ago

Wed, Aug 13 - Wed, Sep 3

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$257 Roundtrip, found 2 days ago

$257

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Wed, Aug 13 from Seattle - Tacoma Intl. to Logan Intl., returning Wed, Sep 3, priced at $257 found 2 days ago

Wed, Sep 24 - Tue, Oct 14

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$257 Roundtrip, found 1 day ago

$257

Roundtrip

found 1 day ago

Select United flight, departing Wed, Sep 24 from Seattle - Tacoma Intl. to Logan Intl., returning Tue, Oct 14, priced at $257 found 1 day ago

Wed, Sep 24 - Tue, Oct 14

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$262 Roundtrip, found 1 day ago

$262

Roundtrip

found 1 day ago

Select American Airlines flight, departing Wed, Sep 24 from Seattle - Tacoma Intl. to Logan Intl., returning Tue, Oct 14, priced at $262 found 1 day ago

Sun, Sep 28 - Sat, Oct 11

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$262 Roundtrip, found 3 days ago

$262

Roundtrip

found 3 days ago

Select JetBlue Airways flight, departing Sun, Sep 28 from Seattle - Tacoma Intl. to Logan Intl., returning Sat, Oct 11, priced at $262 found 3 days ago

Wed, Aug 13 - Thu, Sep 4

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$267 Roundtrip, found 2 days ago

$267

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Wed, Aug 13 from Seattle - Tacoma Intl. to Logan Intl., returning Thu, Sep 4, priced at $267 found 2 days ago

Sun, Sep 7 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$267 Roundtrip, found 1 day ago

$267

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Sun, Sep 7 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $267 found 1 day ago

Tue, Aug 5 - Tue, Aug 26

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$272 Roundtrip, found 2 days ago

$272

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Tue, Aug 5 from Seattle - Tacoma Intl. to Logan Intl., returning Tue, Aug 26, priced at $272 found 2 days ago

Sun, Sep 28 - Mon, Oct 13

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$272 Roundtrip, found 3 days ago

$272

Roundtrip

found 3 days ago

Select JetBlue Airways flight, departing Sun, Sep 28 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Oct 13, priced at $272 found 3 days ago

Wed, Sep 24 - Tue, Oct 14

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$273 Roundtrip, found 1 day ago

$273

Roundtrip

found 1 day ago

Select United flight, departing Wed, Sep 24 from Seattle - Tacoma Intl. to Logan Intl., returning Tue, Oct 14, priced at $273 found 1 day ago

Wed, Jul 30 - Wed, Aug 20

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$277 Roundtrip, found 2 days ago

$277

Roundtrip

found 2 days ago

Select JetBlue Airways flight, departing Wed, Jul 30 from Seattle - Tacoma Intl. to Logan Intl., returning Wed, Aug 20, priced at $277 found 2 days ago

Thu, Sep 4 - Sun, Sep 14

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$282 Roundtrip, found 1 day ago

$282

Roundtrip

found 1 day ago

Select JetBlue Airways flight, departing Thu, Sep 4 from Seattle - Tacoma Intl. to Logan Intl., returning Sun, Sep 14, priced at $282 found 1 day ago

Sun, Sep 7 - Tue, Sep 16

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$292 Roundtrip, found 16 hours ago

$292

Roundtrip

found 16 hours ago

Select United flight, departing Sun, Sep 7 from Seattle - Tacoma Intl. to Logan Intl., returning Tue, Sep 16, priced at $292 found 16 hours ago