$93 Cheap Frontier Airlines flights Seattle (SEA) to St. Louis (STL)

$93 Cheap Frontier Airlines flights Seattle (SEA) to St. Louis (STL)

Prices were available within the past 7 days and start at $93 for one-way flights and $174 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Nov 10 - Tue, Nov 11

SEA

Seattle

STL

St. Louis

$174 Roundtrip, found 12 hours ago

$174

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Mon, Nov 10 from Seattle to St. Louis, returning Tue, Nov 11, priced at $174 found 12 hours ago

Mon, Nov 10 - Wed, Nov 12

SEA

Seattle

STL

St. Louis

$189 Roundtrip, found 12 hours ago

$189

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Mon, Nov 10 from Seattle to St. Louis, returning Wed, Nov 12, priced at $189 found 12 hours ago

Thu, Nov 13 - Sat, Nov 15

SEA

Seattle

STL

St. Louis

$191 Roundtrip, found 12 hours ago

$191

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Thu, Nov 13 from Seattle to St. Louis, returning Sat, Nov 15, priced at $191 found 12 hours ago

Thu, Nov 13 - Sat, Nov 15

SEA

Seattle

STL

St. Louis

$221 Roundtrip, found 12 hours ago

$221

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Thu, Nov 13 from Seattle to St. Louis, returning Sat, Nov 15, priced at $221 found 12 hours ago