Flights from St. Louis to Denver

Cheapest flights from St. Louis

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$118 Roundtrip, found 3 days ago

$118

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $118 found 3 days ago

Mon, Aug 18 - Sat, Aug 23

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$146 Roundtrip, found 3 days ago

$146

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Aug 18 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Aug 23, priced at $146 found 3 days ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$152 Roundtrip, found 3 days ago

$152

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $152 found 3 days ago

Fri, Jul 25 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$155 Roundtrip, found 5 days ago

$155

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Fri, Jul 25 from Lambert-St. Louis Intl. to Denver Intl., returning Wed, Aug 13, priced at $155 found 5 days ago

Mon, Aug 18 - Fri, Aug 22

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$157 Roundtrip, found 3 days ago

$157

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Aug 18 from Lambert-St. Louis Intl. to Denver Intl., returning Fri, Aug 22, priced at $157 found 3 days ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$157 Roundtrip, found 3 days ago

$157

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $157 found 3 days ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$162 Roundtrip, found 3 days ago

$162

Roundtrip

found 3 days ago

Select American Airlines flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $162 found 3 days ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$167 Roundtrip, found 3 days ago

$167

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $167 found 3 days ago

Fri, Aug 22 - Sun, Aug 24

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$168 Roundtrip, found 3 days ago

$168

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 22 from Lambert-St. Louis Intl. to Denver Intl., returning Sun, Aug 24, priced at $168 found 3 days ago

Sat, Aug 2 - Mon, Aug 4

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$170 Roundtrip, found 1 day ago

$170

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Aug 2 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 4, priced at $170 found 1 day ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$172 Roundtrip, found 3 days ago

$172

Roundtrip

found 3 days ago

Select Delta flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $172 found 3 days ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$177 Roundtrip, found 3 days ago

$177

Roundtrip

found 3 days ago

Select American Airlines flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $177 found 3 days ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$187 Roundtrip, found 3 days ago

$187

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $187 found 3 days ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$192 Roundtrip, found 3 days ago

$192

Roundtrip

found 3 days ago

Select American Airlines flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $192 found 3 days ago

Fri, Jul 25 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$193 Roundtrip, found 5 days ago

$193

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Fri, Jul 25 from Lambert-St. Louis Intl. to Denver Intl., returning Wed, Aug 13, priced at $193 found 5 days ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$197 Roundtrip, found 3 days ago

$197

Roundtrip

found 3 days ago

Select American Airlines flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $197 found 3 days ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$197 Roundtrip, found 3 days ago

$197

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $197 found 3 days ago

Sun, Aug 17 - Sat, Aug 23

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$205 Roundtrip, found 3 days ago

$205

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sun, Aug 17 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Aug 23, priced at $205 found 3 days ago

Wed, Aug 20 - Mon, Aug 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$206 Roundtrip, found 3 days ago

$206

Roundtrip

found 3 days ago

Select United flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Aug 25, priced at $206 found 3 days ago

Fri, Aug 1 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$207 Roundtrip, found 1 day ago

$207

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 1 from Lambert-St. Louis Intl. to Denver Intl., returning Wed, Aug 13, priced at $207 found 1 day ago