Flights from Allentown to Seattle

Cheapest flights from Allentown

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, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$268 Roundtrip, found 6 days ago

$268

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $268 found 6 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$278 Roundtrip, found 6 days ago

$278

Roundtrip

found 6 days ago

Select United flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $278 found 6 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$286 Roundtrip, found 6 days ago

$286

Roundtrip

found 6 days ago

Select Delta flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $286 found 6 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$295 Roundtrip, found 6 days ago

$295

Roundtrip

found 6 days ago

Select American Airlines flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $295 found 6 days ago

Mon, Sep 15 - Tue, Sep 30

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$297 Roundtrip, found 2 days ago

$297

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Mon, Sep 15 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Tue, Sep 30, priced at $297 found 2 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$298 Roundtrip, found 6 days ago

$298

Roundtrip

found 6 days ago

Select American Airlines flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $298 found 6 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$308 Roundtrip, found 6 days ago

$308

Roundtrip

found 6 days ago

Select American Airlines flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $308 found 6 days ago

Fri, Sep 19 - Tue, Sep 30

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$313 Roundtrip, found 2 days ago

$313

Roundtrip

found 2 days ago

Select Delta flight, departing Fri, Sep 19 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Tue, Sep 30, priced at $313 found 2 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$316 Roundtrip, found 6 days ago

$316

Roundtrip

found 6 days ago

Select Spirit Airlines flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $316 found 6 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$316 Roundtrip, found 6 days ago

$316

Roundtrip

found 6 days ago

Select American Airlines flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $316 found 6 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$318 Roundtrip, found 6 days ago

$318

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $318 found 6 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$323 Roundtrip, found 6 days ago

$323

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $323 found 6 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$326 Roundtrip, found 6 days ago

$326

Roundtrip

found 6 days ago

Select American Airlines flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $326 found 6 days ago

Wed, Aug 27 - Sun, Sep 7

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$327 Roundtrip, found 6 days ago

$327

Roundtrip

found 6 days ago

Select Alaska Airlines flight, departing Wed, Aug 27 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 7, priced at $327 found 6 days ago

Thu, Sep 18 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$347 Roundtrip, found 2 days ago

$347

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Thu, Sep 18 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $347 found 2 days ago

Mon, Sep 15 - Sun, Sep 28

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$363 Roundtrip, found 2 days ago

$363

Roundtrip

found 2 days ago

Select JetBlue Airways flight, departing Mon, Sep 15 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 28, priced at $363 found 2 days ago

Fri, Sep 19 - Sun, Sep 28

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$365 Roundtrip, found 2 days ago

$365

Roundtrip

found 2 days ago

Select Delta flight, departing Fri, Sep 19 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 28, priced at $365 found 2 days ago

Thu, Sep 18 - Sun, Sep 28

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$377 Roundtrip, found 2 days ago

$377

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Thu, Sep 18 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Sun, Sep 28, priced at $377 found 2 days ago

Mon, Aug 11 - Wed, Aug 20

ABE

Lehigh Valley Intl.

SEA

Seattle - Tacoma Intl.

$398 Roundtrip, found 1 day ago

$398

Roundtrip

found 1 day ago

Select American Airlines flight, departing Mon, Aug 11 from Lehigh Valley Intl. to Seattle - Tacoma Intl., returning Wed, Aug 20, priced at $398 found 1 day ago

Tue, Aug 12 - Thu, Aug 21

ABE

Lehigh Valley Intl.

SEA

Seattle - Tacoma Intl.

$408 Roundtrip, found 1 day ago

$408

Roundtrip

found 1 day ago

Select United flight, departing Tue, Aug 12 from Lehigh Valley Intl. to Seattle - Tacoma Intl., returning Thu, Aug 21, priced at $408 found 1 day ago