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.

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$237 Roundtrip, found 5 days ago

$237

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $237 found 5 days ago

Tue, Jul 8 - Tue, Jul 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$237 Roundtrip, found 17 hours ago

$237

Roundtrip

found 17 hours ago

Select JetBlue Airways flight, departing Tue, Jul 8 from Seattle - Tacoma Intl. to Logan Intl., returning Tue, Jul 15, priced at $237 found 17 hours ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$247 Roundtrip, found 5 days ago

$247

Roundtrip

found 5 days ago

Select United flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $247 found 5 days ago

Wed, Sep 3 - Fri, Sep 19

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$247 Roundtrip, found 6 days ago

$247

Roundtrip

found 6 days ago

Select Hawaiian Airlines flight, departing Wed, Sep 3 from Seattle - Tacoma Intl. to Logan Intl., returning Fri, Sep 19, priced at $247 found 6 days ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$257 Roundtrip, found 5 days ago

$257

Roundtrip

found 5 days ago

Select United flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $257 found 5 days ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$257 Roundtrip, found 5 days ago

$257

Roundtrip

found 5 days ago

Select American Airlines flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $257 found 5 days ago

Fri, Sep 5 - Fri, Sep 19

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$257 Roundtrip, found 6 days ago

$257

Roundtrip

found 6 days ago

Select Hawaiian Airlines flight, departing Fri, Sep 5 from Seattle - Tacoma Intl. to Logan Intl., returning Fri, Sep 19, priced at $257 found 6 days ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$267 Roundtrip, found 5 days ago

$267

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $267 found 5 days ago

Fri, Jul 11 - Thu, Jul 17

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$272 Roundtrip, found 17 hours ago

$272

Roundtrip

found 17 hours ago

Select JetBlue Airways flight, departing Fri, Jul 11 from Seattle - Tacoma Intl. to Logan Intl., returning Thu, Jul 17, priced at $272 found 17 hours ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$277 Roundtrip, found 5 days ago

$277

Roundtrip

found 5 days ago

Select JetBlue Airways flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $277 found 5 days ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$278 Roundtrip, found 5 days ago

$278

Roundtrip

found 5 days ago

Select United flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $278 found 5 days ago

Fri, Jul 11 - Thu, Jul 17

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$282 Roundtrip, found 17 hours ago

$282

Roundtrip

found 17 hours ago

Select United flight, departing Fri, Jul 11 from Seattle - Tacoma Intl. to Logan Intl., returning Thu, Jul 17, priced at $282 found 17 hours ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$287 Roundtrip, found 5 days ago

$287

Roundtrip

found 5 days ago

Select American Airlines flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $287 found 5 days ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$287 Roundtrip, found 5 days ago

$287

Roundtrip

found 5 days ago

Select American Airlines flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $287 found 5 days ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$287 Roundtrip, found 5 days ago

$287

Roundtrip

found 5 days ago

Select Delta flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $287 found 5 days ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$288 Roundtrip, found 5 days ago

$288

Roundtrip

found 5 days ago

Select United flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $288 found 5 days ago

Sat, Sep 6 - Sat, Sep 20

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$290 Roundtrip, found 6 days ago

$290

Roundtrip

found 6 days ago

Select United flight, departing Sat, Sep 6 from Seattle - Tacoma Intl. to Logan Intl., returning Sat, Sep 20, priced at $290 found 6 days ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$295 Roundtrip, found 5 days ago

$295

Roundtrip

found 5 days ago

Select United flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $295 found 5 days ago

Wed, Sep 10 - Mon, Sep 15

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$297 Roundtrip, found 5 days ago

$297

Roundtrip

found 5 days ago

Select American Airlines flight, departing Wed, Sep 10 from Seattle - Tacoma Intl. to Logan Intl., returning Mon, Sep 15, priced at $297 found 5 days ago

Fri, Jul 11 - Thu, Jul 17

SEA

Seattle - Tacoma Intl.

BOS

Logan Intl.

$488 Roundtrip, found 17 hours ago

$488

Roundtrip

found 17 hours ago

Select Sun Country Airlines flight, departing Fri, Jul 11 from Seattle - Tacoma Intl. to Logan Intl., returning Thu, Jul 17, priced at $488 found 17 hours ago