Flights from Denver to Caseyville

Cheapest flights from Denver

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, Jul 30 - Mon, Aug 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$114 Roundtrip, found 3 days ago

$114

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Wed, Jul 30 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 4, priced at $114 found 3 days ago

Sat, Aug 2 - Mon, Aug 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$118 Roundtrip, found 3 days ago

$118

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Aug 2 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 4, priced at $118 found 3 days ago

Wed, Jul 9 - Sat, Jul 19

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$120 Roundtrip, found 3 days ago

$120

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Wed, Jul 9 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Jul 19, priced at $120 found 3 days ago

Fri, Aug 1 - Mon, Aug 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$123 Roundtrip, found 3 days ago

$123

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 1 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 4, priced at $123 found 3 days ago

Mon, Jul 28 - Mon, Aug 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$123 Roundtrip, found 3 days ago

$123

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Jul 28 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 4, priced at $123 found 3 days ago

Wed, Jul 30 - Wed, Aug 6

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$124 Roundtrip, found 3 days ago

$124

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Wed, Jul 30 from Denver Intl. to Lambert-St. Louis Intl., returning Wed, Aug 6, priced at $124 found 3 days ago

Fri, Jul 11 - Sat, Jul 19

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$126 Roundtrip, found 3 days ago

$126

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Jul 11 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Jul 19, priced at $126 found 3 days ago

Wed, Jul 30 - Fri, Aug 1

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$128 Roundtrip, found 3 days ago

$128

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Wed, Jul 30 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, Aug 1, priced at $128 found 3 days ago

Fri, Aug 1 - Wed, Aug 6

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$133 Roundtrip, found 3 days ago

$133

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 1 from Denver Intl. to Lambert-St. Louis Intl., returning Wed, Aug 6, priced at $133 found 3 days ago

Mon, Jul 28 - Wed, Aug 6

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$133 Roundtrip, found 3 days ago

$133

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Jul 28 from Denver Intl. to Lambert-St. Louis Intl., returning Wed, Aug 6, priced at $133 found 3 days ago

Mon, Jul 28 - Sat, Aug 2

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$138 Roundtrip, found 3 days ago

$138

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Mon, Jul 28 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Aug 2, priced at $138 found 3 days ago

Mon, Jul 7 - Fri, Jul 11

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$146 Roundtrip, found 2 days ago

$146

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Jul 7 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, Jul 11, priced at $146 found 2 days ago

Fri, Aug 1 - Sat, Aug 2

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$148 Roundtrip, found 3 days ago

$148

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 1 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Aug 2, priced at $148 found 3 days ago

Wed, Jul 9 - Sat, Jul 12

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$154 Roundtrip, found 2 days ago

$154

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Wed, Jul 9 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Jul 12, priced at $154 found 2 days ago

Wed, Jul 30 - Tue, Aug 5

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$159 Roundtrip, found 3 days ago

$159

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Wed, Jul 30 from Denver Intl. to Lambert-St. Louis Intl., returning Tue, Aug 5, priced at $159 found 3 days ago

Fri, Jul 11 - Sat, Jul 12

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$160 Roundtrip, found 2 days ago

$160

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Jul 11 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Jul 12, priced at $160 found 2 days ago

Sat, Aug 2 - Tue, Aug 5

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$163 Roundtrip, found 3 days ago

$163

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Aug 2 from Denver Intl. to Lambert-St. Louis Intl., returning Tue, Aug 5, priced at $163 found 3 days ago

Thu, Jul 31 - Mon, Aug 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$242 Roundtrip, found 1 day ago

$242

Roundtrip

found 1 day ago

Select United flight, departing Thu, Jul 31 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 4, priced at $242 found 1 day ago

Thu, Jul 31 - Thu, Aug 7

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$262 Roundtrip, found 3 days ago

$262

Roundtrip

found 3 days ago

Select Delta flight, departing Thu, Jul 31 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Aug 7, priced at $262 found 3 days ago

Thu, Jul 31 - Mon, Aug 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$292 Roundtrip, found 1 day ago

$292

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Jul 31 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 4, priced at $292 found 1 day ago