$87 Cheap Frontier Airlines flights St. Louis (STL) to Seattle (SEA)

$87 Cheap Frontier Airlines flights St. Louis (STL) to Seattle (SEA)

Prices were available within the past 7 days and start at $87 for one-way flights and $174 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 23 - Fri, Oct 24

STL

St. Louis

SEA

Seattle

$174 Roundtrip, found 15 hours ago

$174

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Thu, Oct 23 from St. Louis to Seattle, returning Fri, Oct 24, priced at $174 found 15 hours ago

Sun, Oct 26 - Mon, Oct 27

STL

St. Louis

SEA

Seattle

$212 Roundtrip, found 15 hours ago

$212

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Sun, Oct 26 from St. Louis to Seattle, returning Mon, Oct 27, priced at $212 found 15 hours ago