$246 Cheap Frontier Airlines flights St. Louis (STL) to Seattle (SEA)

$246 Cheap Frontier Airlines flights St. Louis (STL) to Seattle (SEA)

Prices were available within the past 7 days and start at $246 for one-way flights and $229 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Jun 7 - Tue, Jun 10

STL

St. Louis

SEA

Seattle

$229 Roundtrip, found 1 day ago

$229

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Jun 7 from St. Louis to Seattle, returning Tue, Jun 10, priced at $229 found 1 day ago

Mon, Jun 9 - Tue, Jun 10

STL

St. Louis

SEA

Seattle

$239 Roundtrip, found 1 day ago

$239

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jun 9 from St. Louis to Seattle, returning Tue, Jun 10, priced at $239 found 1 day ago