Flights from New Castle to Seattle

Cheapest flights from New Castle

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.

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$278 Roundtrip, found 5 days ago

$278

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $278 found 5 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$288 Roundtrip, found 5 days ago

$288

Roundtrip

found 5 days ago

Select Delta flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $288 found 5 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$297 Roundtrip, found 5 days ago

$297

Roundtrip

found 5 days ago

Select United flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $297 found 5 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$297 Roundtrip, found 5 days ago

$297

Roundtrip

found 5 days ago

Select Delta flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $297 found 5 days ago

Fri, Aug 15 - Thu, Aug 21

PHL

Philadelphia Intl.

PAE

Seattle Paine Field Intl. Airport

$308 Roundtrip, found 2 days ago

$308

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Aug 15 from Philadelphia Intl. to Seattle Paine Field Intl. Airport, returning Thu, Aug 21, priced at $308 found 2 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$322 Roundtrip, found 5 days ago

$322

Roundtrip

found 5 days ago

Select United flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $322 found 5 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$327 Roundtrip, found 5 days ago

$327

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $327 found 5 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$327 Roundtrip, found 5 days ago

$327

Roundtrip

found 5 days ago

Select American Airlines flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $327 found 5 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$328 Roundtrip, found 5 days ago

$328

Roundtrip

found 5 days ago

Select American Airlines flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $328 found 5 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$330 Roundtrip, found 5 days ago

$330

Roundtrip

found 5 days ago

Select United flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $330 found 5 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$337 Roundtrip, found 5 days ago

$337

Roundtrip

found 5 days ago

Select American Airlines flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $337 found 5 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$338 Roundtrip, found 5 days ago

$338

Roundtrip

found 5 days ago

Select Delta flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $338 found 5 days ago

Thu, Aug 14 - Thu, Aug 21

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$339 Roundtrip, found 1 day ago

$339

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Aug 14 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Thu, Aug 21, priced at $339 found 1 day ago

Thu, Aug 14 - Thu, Aug 21

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$348 Roundtrip, found 1 day ago

$348

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Aug 14 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Thu, Aug 21, priced at $348 found 1 day ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$356 Roundtrip, found 5 days ago

$356

Roundtrip

found 5 days ago

Select United flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $356 found 5 days ago

Sun, Sep 7 - Wed, Sep 24

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$358 Roundtrip, found 5 days ago

$358

Roundtrip

found 5 days ago

Select United flight, departing Sun, Sep 7 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Wed, Sep 24, priced at $358 found 5 days ago

Wed, Aug 13 - Tue, Aug 19

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$557 Roundtrip, found 2 days ago

$557

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Wed, Aug 13 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Tue, Aug 19, priced at $557 found 2 days ago

Thu, Aug 14 - Thu, Aug 21

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$593 Roundtrip, found 1 day ago

$593

Roundtrip

found 1 day ago

Select Sun Country Airlines flight, departing Thu, Aug 14 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Thu, Aug 21, priced at $593 found 1 day ago

Sun, Jun 21 - Fri, Jun 26

PHL

Philadelphia Intl.

SEA

Seattle - Tacoma Intl.

$891 Roundtrip, found 1 day ago

$891

Roundtrip

found 1 day ago

Select JetBlue Airways flight, departing Sun, Jun 21 from Philadelphia Intl. to Seattle - Tacoma Intl., returning Fri, Jun 26, priced at $891 found 1 day ago

Sun, Jun 21 - Fri, Jun 26

TTN

Mercer

SEA

Seattle - Tacoma Intl.

$967 Roundtrip, found 1 day ago

$967

Roundtrip

found 1 day ago

Select American Airlines flight, departing Sun, Jun 21 from Mercer to Seattle - Tacoma Intl., returning Fri, Jun 26, priced at $967 found 1 day ago