$34 Cheap Frontier Airlines flights St. Louis (STL) to Denver (DEN)

$34 Cheap Frontier Airlines flights St. Louis (STL) to Denver (DEN)

Prices were available within the past 7 days and start at $34 for one-way flights and $124 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Dec 17 - Sat, Dec 20

STL

St. Louis

DEN

Denver

$124 Roundtrip, found 21 hours ago

$124

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Wed, Dec 17 from St. Louis to Denver, returning Sat, Dec 20, priced at $124 found 21 hours ago

Wed, Dec 17 - Wed, Dec 24

STL

St. Louis

DEN

Denver

$129 Roundtrip, found 21 hours ago

$129

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Wed, Dec 17 from St. Louis to Denver, returning Wed, Dec 24, priced at $129 found 21 hours ago

Tue, Dec 16 - Wed, Dec 17

STL

St. Louis

DEN

Denver

$131 Roundtrip, found 21 hours ago

$131

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Tue, Dec 16 from St. Louis to Denver, returning Wed, Dec 17, priced at $131 found 21 hours ago

Wed, Dec 17 - Sun, Dec 21

STL

St. Louis

DEN

Denver

$132 Roundtrip, found 21 hours ago

$132

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Wed, Dec 17 from St. Louis to Denver, returning Sun, Dec 21, priced at $132 found 21 hours ago

Wed, Dec 17 - Mon, Dec 22

STL

St. Louis

DEN

Denver

$139 Roundtrip, found 21 hours ago

$139

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Wed, Dec 17 from St. Louis to Denver, returning Mon, Dec 22, priced at $139 found 21 hours ago

Wed, Dec 17 - Thu, Dec 18

STL

St. Louis

DEN

Denver

$151 Roundtrip, found 21 hours ago

$151

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Wed, Dec 17 from St. Louis to Denver, returning Thu, Dec 18, priced at $151 found 21 hours ago