$49 Cheap Frontier Airlines flights St. Louis (STL) to Denver (DEN)

$49 Cheap Frontier Airlines flights St. Louis (STL) to Denver (DEN)

Prices were available within the past 7 days and start at $49 for one-way flights and $188 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Jan 19 - Sat, Jan 24

STL

St. Louis

DEN

Denver

$188 Roundtrip, found 1 day ago

$188

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 19 from St. Louis to Denver, returning Sat, Jan 24, priced at $188 found 1 day ago

Mon, Jan 19 - Fri, Jan 23

STL

St. Louis

DEN

Denver

$208 Roundtrip, found 1 day ago

$208

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 19 from St. Louis to Denver, returning Fri, Jan 23, priced at $208 found 1 day ago

Mon, Jan 19 - Thu, Jan 22

STL

St. Louis

DEN

Denver

$210 Roundtrip, found 1 day ago

$210

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 19 from St. Louis to Denver, returning Thu, Jan 22, priced at $210 found 1 day ago

Sat, Jan 17 - Sat, Jan 24

STL

St. Louis

DEN

Denver

$230 Roundtrip, found 1 day ago

$230

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Jan 17 from St. Louis to Denver, returning Sat, Jan 24, priced at $230 found 1 day ago

Mon, Jan 19 - Sun, Jan 25

STL

St. Louis

DEN

Denver

$244 Roundtrip, found 1 day ago

$244

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 19 from St. Louis to Denver, returning Sun, Jan 25, priced at $244 found 1 day ago

Mon, Jan 19 - Wed, Jan 21

STL

St. Louis

DEN

Denver

$248 Roundtrip, found 1 day ago

$248

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 19 from St. Louis to Denver, returning Wed, Jan 21, priced at $248 found 1 day ago

Mon, Jan 19 - Tue, Jan 20

STL

St. Louis

DEN

Denver

$250 Roundtrip, found 1 day ago

$250

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 19 from St. Louis to Denver, returning Tue, Jan 20, priced at $250 found 1 day ago

Sat, Jan 17 - Thu, Jan 22

STL

St. Louis

DEN

Denver

$252 Roundtrip, found 1 day ago

$252

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Jan 17 from St. Louis to Denver, returning Thu, Jan 22, priced at $252 found 1 day ago

Sun, Jan 18 - Sat, Jan 24

STL

St. Louis

DEN

Denver

$264 Roundtrip, found 1 day ago

$264

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Jan 18 from St. Louis to Denver, returning Sat, Jan 24, priced at $264 found 1 day ago