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

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

Prices were available within the past 7 days and start at $34 for one-way flights and $68 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Feb 9 - Wed, Feb 11

DEN

Denver

STL

St. Louis

$68 Roundtrip, found 20 hours ago

$68

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Mon, Feb 9 from Denver to St. Louis, returning Wed, Feb 11, priced at $68 found 20 hours ago

Wed, Feb 18 - Wed, Mar 4

DEN

Denver

STL

St. Louis

$72 Roundtrip, found 20 hours ago

$72

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Wed, Feb 18 from Denver to St. Louis, returning Wed, Mar 4, priced at $72 found 20 hours ago

Mon, Feb 9 - Fri, Feb 20

DEN

Denver

STL

St. Louis

$83 Roundtrip, found 20 hours ago

$83

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Mon, Feb 9 from Denver to St. Louis, returning Fri, Feb 20, priced at $83 found 20 hours ago

Mon, Feb 9 - Fri, Feb 13

DEN

Denver

STL

St. Louis

$93 Roundtrip, found 20 hours ago

$93

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Mon, Feb 9 from Denver to St. Louis, returning Fri, Feb 13, priced at $93 found 20 hours ago

Mon, Feb 9 - Fri, Feb 27

DEN

Denver

STL

St. Louis

$103 Roundtrip, found 20 hours ago

$103

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Mon, Feb 9 from Denver to St. Louis, returning Fri, Feb 27, priced at $103 found 20 hours ago

Mon, Feb 23 - Tue, Mar 10

DEN

Denver

STL

St. Louis

$104 Roundtrip, found 20 hours ago

$104

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Mon, Feb 23 from Denver to St. Louis, returning Tue, Mar 10, priced at $104 found 20 hours ago

Mon, Feb 9 - Mon, Mar 2

DEN

Denver

STL

St. Louis

$105 Roundtrip, found 20 hours ago

$105

Roundtrip

found 20 hours ago

Select Frontier Airlines flight, departing Mon, Feb 9 from Denver to St. Louis, returning Mon, Mar 2, priced at $105 found 20 hours ago