$241 Cheap Frontier Airlines flights Seattle (SEA) to St. Louis (STL)

$241 Cheap Frontier Airlines flights Seattle (SEA) to St. Louis (STL)

Prices were available within the past 7 days and start at $241 for one-way flights and $310 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 1 - Fri, Jul 4

SEA

Seattle

STL

St. Louis

$310 Roundtrip, found 2 days ago

$310

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Jul 1 from Seattle to St. Louis, returning Fri, Jul 4, priced at $310 found 2 days ago

Sun, Jun 29 - Wed, Jul 2

SEA

Seattle

STL

St. Louis

$330 Roundtrip, found 2 days ago

$330

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Jun 29 from Seattle to St. Louis, returning Wed, Jul 2, priced at $330 found 2 days ago

Sun, Jun 29 - Fri, Jul 4

SEA

Seattle

STL

St. Louis

$335 Roundtrip, found 2 days ago

$335

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sun, Jun 29 from Seattle to St. Louis, returning Fri, Jul 4, priced at $335 found 2 days ago