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

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

Prices were available within the past 7 days and start at for one-way flights and $216 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jan 1 - Sat, Jan 10

SEA

Seattle

STL

St. Louis

$216 Roundtrip, found 1 day ago

$216

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 1 from Seattle to St. Louis, returning Sat, Jan 10, priced at $216 found 1 day ago

Thu, Jan 1 - Sun, Jan 11

SEA

Seattle

STL

St. Louis

$220 Roundtrip, found 1 day ago

$220

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 1 from Seattle to St. Louis, returning Sun, Jan 11, priced at $220 found 1 day ago

Fri, Jan 2 - Sat, Jan 10

SEA

Seattle

STL

St. Louis

$256 Roundtrip, found 1 day ago

$256

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jan 2 from Seattle to St. Louis, returning Sat, Jan 10, priced at $256 found 1 day ago

Fri, Jan 2 - Sun, Jan 11

SEA

Seattle

STL

St. Louis

$260 Roundtrip, found 1 day ago

$260

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jan 2 from Seattle to St. Louis, returning Sun, Jan 11, priced at $260 found 1 day ago

Thu, Jan 1 - Thu, Jan 8

SEA

Seattle

STL

St. Louis

$262 Roundtrip, found 1 day ago

$262

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 1 from Seattle to St. Louis, returning Thu, Jan 8, priced at $262 found 1 day ago

Fri, Jan 2 - Thu, Jan 8

SEA

Seattle

STL

St. Louis

$302 Roundtrip, found 1 day ago

$302

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jan 2 from Seattle to St. Louis, returning Thu, Jan 8, priced at $302 found 1 day ago

Fri, Jan 2 - Sun, Jan 4

SEA

Seattle

STL

St. Louis

$372 Roundtrip, found 1 day ago

$372

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jan 2 from Seattle to St. Louis, returning Sun, Jan 4, priced at $372 found 1 day ago