Cheap Frontier Airlines flights Seattle (SEA) to Philadelphia (PHL)

Cheap Frontier Airlines flights Seattle (SEA) to Philadelphia (PHL)

Prices were available within the past 7 days and start at for one-way flights and $320 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 1 - Wed, Jul 9

SEA

Seattle

PHL

Philadelphia

$320 Roundtrip, found 1 day ago

$320

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jul 1 from Seattle to Philadelphia, returning Wed, Jul 9, priced at $320 found 1 day ago

Tue, Jul 1 - Thu, Jul 10

SEA

Seattle

PHL

Philadelphia

$328 Roundtrip, found 1 day ago

$328

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jul 1 from Seattle to Philadelphia, returning Thu, Jul 10, priced at $328 found 1 day ago

Tue, Jul 1 - Fri, Jul 4

SEA

Seattle

PHL

Philadelphia

$333 Roundtrip, found 1 day ago

$333

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jul 1 from Seattle to Philadelphia, returning Fri, Jul 4, priced at $333 found 1 day ago

Thu, Jul 3 - Thu, Jul 10

SEA

Seattle

PHL

Philadelphia

$336 Roundtrip, found 1 day ago

$336

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jul 3 from Seattle to Philadelphia, returning Thu, Jul 10, priced at $336 found 1 day ago

Thu, Jul 3 - Fri, Jul 4

SEA

Seattle

PHL

Philadelphia

$341 Roundtrip, found 1 day ago

$341

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jul 3 from Seattle to Philadelphia, returning Fri, Jul 4, priced at $341 found 1 day ago

Fri, Jul 4 - Sun, Jul 6

SEA

Seattle

PHL

Philadelphia

$346 Roundtrip, found 1 day ago

$346

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 4 from Seattle to Philadelphia, returning Sun, Jul 6, priced at $346 found 1 day ago

Thu, Jul 31 - Sat, Aug 16

SEA

Seattle

PHL

Philadelphia

$370 Roundtrip, found 6 days ago

$370

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Jul 31 from Seattle to Philadelphia, returning Sat, Aug 16, priced at $370 found 6 days ago

Tue, Jul 1 - Thu, Jul 3

SEA

Seattle

PHL

Philadelphia

$373 Roundtrip, found 1 day ago

$373

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jul 1 from Seattle to Philadelphia, returning Thu, Jul 3, priced at $373 found 1 day ago

Thu, Jul 31 - Sun, Aug 10

SEA

Seattle

PHL

Philadelphia

$375 Roundtrip, found 6 days ago

$375

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Jul 31 from Seattle to Philadelphia, returning Sun, Aug 10, priced at $375 found 6 days ago

Sun, Jun 29 - Wed, Jul 9

SEA

Seattle

PHL

Philadelphia

$378 Roundtrip, found 1 day ago

$378

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Jun 29 from Seattle to Philadelphia, returning Wed, Jul 9, priced at $378 found 1 day ago

Mon, Jun 30 - Thu, Jul 3

SEA

Seattle

PHL

Philadelphia

$381 Roundtrip, found 1 day ago

$381

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jun 30 from Seattle to Philadelphia, returning Thu, Jul 3, priced at $381 found 1 day ago

Sun, Jun 29 - Thu, Jul 10

SEA

Seattle

PHL

Philadelphia

$386 Roundtrip, found 1 day ago

$386

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Jun 29 from Seattle to Philadelphia, returning Thu, Jul 10, priced at $386 found 1 day ago