$56 Cheap Frontier Airlines flights St. Louis (STL) to Denver (DEN)

$56 Cheap Frontier Airlines flights St. Louis (STL) to Denver (DEN)

Prices were available within the past 7 days and start at $56 for one-way flights and $96 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Oct 7 - Wed, Oct 8

STL

St. Louis

DEN

Denver

$96 Roundtrip, found 6 days ago

$96

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Tue, Oct 7 from St. Louis to Denver, returning Wed, Oct 8, priced at $96 found 6 days ago

Sat, Oct 4 - Tue, Oct 7

STL

St. Louis

DEN

Denver

$112 Roundtrip, found 6 days ago

$112

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Oct 4 from St. Louis to Denver, returning Tue, Oct 7, priced at $112 found 6 days ago

Tue, Oct 7 - Thu, Oct 9

STL

St. Louis

DEN

Denver

$119 Roundtrip, found 6 days ago

$119

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Tue, Oct 7 from St. Louis to Denver, returning Thu, Oct 9, priced at $119 found 6 days ago

Tue, Sep 30 - Sat, Oct 4

STL

St. Louis

DEN

Denver

$128 Roundtrip, found 17 hours ago

$128

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Tue, Sep 30 from St. Louis to Denver, returning Sat, Oct 4, priced at $128 found 17 hours ago

Sat, Oct 4 - Thu, Oct 9

STL

St. Louis

DEN

Denver

$130 Roundtrip, found 6 days ago

$130

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Oct 4 from St. Louis to Denver, returning Thu, Oct 9, priced at $130 found 6 days ago

Tue, Sep 30 - Wed, Oct 1

STL

St. Louis

DEN

Denver

$130 Roundtrip, found 2 days ago

$130

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Sep 30 from St. Louis to Denver, returning Wed, Oct 1, priced at $130 found 2 days ago

Mon, Oct 6 - Tue, Oct 7

STL

St. Louis

DEN

Denver

$134 Roundtrip, found 6 days ago

$134

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Mon, Oct 6 from St. Louis to Denver, returning Tue, Oct 7, priced at $134 found 6 days ago

Tue, Sep 30 - Thu, Oct 2

STL

St. Louis

DEN

Denver

$135 Roundtrip, found 2 days ago

$135

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Sep 30 from St. Louis to Denver, returning Thu, Oct 2, priced at $135 found 2 days ago