$159 Cheap Frontier Airlines flights St. Louis (STL) to Seattle (SEA)

$159 Cheap Frontier Airlines flights St. Louis (STL) to Seattle (SEA)

Prices were available within the past 7 days and start at $159 for one-way flights and $283 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Aug 24 - Thu, Aug 28

STL

St. Louis

SEA

Seattle

$283 Roundtrip, found 1 day ago

$283

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Aug 24 from St. Louis to Seattle, returning Thu, Aug 28, priced at $283 found 1 day ago

Mon, Jul 21 - Tue, Jul 22

STL

St. Louis

SEA

Seattle

$315 Roundtrip, found 1 day ago

$315

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jul 21 from St. Louis to Seattle, returning Tue, Jul 22, priced at $315 found 1 day ago