$115 Cheap Frontier Airlines flights St. Louis (STL) to Denver (DEN)

$115 Cheap Frontier Airlines flights St. Louis (STL) to Denver (DEN)

Prices were available within the past 7 days and start at $115 for one-way flights and $129 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jun 11 - Wed, Jun 18

STL

St. Louis

DEN

Denver

$129 Roundtrip, found 5 days ago

$129

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, Jun 11 from St. Louis to Denver, returning Wed, Jun 18, priced at $129 found 5 days ago

Wed, Jun 25 - Mon, Jun 30

STL

St. Louis

DEN

Denver

$148 Roundtrip, found 1 day ago

$148

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jun 25 from St. Louis to Denver, returning Mon, Jun 30, priced at $148 found 1 day ago

Wed, Jun 11 - Sat, Jun 14

STL

St. Louis

DEN

Denver

$150 Roundtrip, found 5 days ago

$150

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, Jun 11 from St. Louis to Denver, returning Sat, Jun 14, priced at $150 found 5 days ago

Wed, Jun 25 - Fri, Jun 27

STL

St. Louis

DEN

Denver

$160 Roundtrip, found 1 day ago

$160

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jun 25 from St. Louis to Denver, returning Fri, Jun 27, priced at $160 found 1 day ago

Fri, Jun 13 - Wed, Jun 18

STL

St. Louis

DEN

Denver

$169 Roundtrip, found 5 days ago

$169

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Fri, Jun 13 from St. Louis to Denver, returning Wed, Jun 18, priced at $169 found 5 days ago

Wed, Jun 25 - Sat, Jun 28

STL

St. Louis

DEN

Denver

$170 Roundtrip, found 1 day ago

$170

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jun 25 from St. Louis to Denver, returning Sat, Jun 28, priced at $170 found 1 day ago

Wed, Jun 25 - Sat, Jul 5

STL

St. Louis

DEN

Denver

$171 Roundtrip, found 1 day ago

$171

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jun 25 from St. Louis to Denver, returning Sat, Jul 5, priced at $171 found 1 day ago