$116 Cheap Frontier Airlines flights Seattle (SEA) to St. Louis (STL)

$116 Cheap Frontier Airlines flights Seattle (SEA) to St. Louis (STL)

Prices were available within the past 7 days and start at $116 for one-way flights and $280 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jun 23 - Sun, Jun 28

SEA

Seattle

STL

St. Louis

$280 Roundtrip, found 1 day ago

$280

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jun 23 from Seattle to St. Louis, returning Sun, Jun 28, priced at $280 found 1 day ago

Tue, Jun 23 - Sat, Jun 27

SEA

Seattle

STL

St. Louis

$300 Roundtrip, found 1 day ago

$300

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jun 23 from Seattle to St. Louis, returning Sat, Jun 27, priced at $300 found 1 day ago

Tue, Jun 23 - Wed, Jul 1

SEA

Seattle

STL

St. Louis

$314 Roundtrip, found 1 day ago

$314

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jun 23 from Seattle to St. Louis, returning Wed, Jul 1, priced at $314 found 1 day ago