Flights from Denver to St. Louis

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.

Tue, Aug 26 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$101 Roundtrip, found 3 days ago

$101

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Tue, Aug 26 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $101 found 3 days ago

Thu, Aug 28 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$106 Roundtrip, found 3 days ago

$106

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Thu, Aug 28 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $106 found 3 days ago

Fri, Oct 10 - Sat, Oct 18

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$115 Roundtrip, found 2 days ago

$115

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Oct 10 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Oct 18, priced at $115 found 2 days ago

Tue, Aug 26 - Fri, Sep 5

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$115 Roundtrip, found 3 days ago

$115

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Tue, Aug 26 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, Sep 5, priced at $115 found 3 days ago

Thu, Aug 28 - Fri, Sep 5

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 Thu, Aug 28 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, Sep 5, priced at $120 found 3 days ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$122 Roundtrip, found 3 days ago

$122

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $122 found 3 days ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$134 Roundtrip, found 3 days ago

$134

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $134 found 3 days ago

Mon, Aug 11 - Sat, Aug 16

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$144 Roundtrip, found 6 days ago

$144

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Mon, Aug 11 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Aug 16, priced at $144 found 6 days ago

Fri, Aug 29 - Fri, Sep 5

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 29 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, Sep 5, priced at $148 found 3 days ago

Fri, Oct 10 - Sat, Oct 18

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$153 Roundtrip, found 2 days ago

$153

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Oct 10 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Oct 18, priced at $153 found 2 days ago

Thu, Aug 14 - Mon, Aug 18

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$159 Roundtrip, found 6 days ago

$159

Roundtrip

found 6 days ago

Select Delta flight, departing Thu, Aug 14 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 18, priced at $159 found 6 days ago

Mon, Aug 11 - Fri, Aug 15

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$166 Roundtrip, found 6 days ago

$166

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Mon, Aug 11 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, Aug 15, priced at $166 found 6 days ago

Thu, Aug 14 - Mon, Aug 18

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$177 Roundtrip, found 6 days ago

$177

Roundtrip

found 6 days ago

Select American Airlines flight, departing Thu, Aug 14 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 18, priced at $177 found 6 days ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$179 Roundtrip, found 3 days ago

$179

Roundtrip

found 3 days ago

Select American Airlines flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $179 found 3 days ago

Wed, Aug 6 - Wed, Aug 13

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$179 Roundtrip, found 12 hours ago

$179

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Denver Intl. to Lambert-St. Louis Intl., returning Wed, Aug 13, priced at $179 found 12 hours ago

Thu, Aug 14 - Mon, Aug 18

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$184 Roundtrip, found 6 days ago

$184

Roundtrip

found 6 days ago

Select American Airlines flight, departing Thu, Aug 14 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 18, priced at $184 found 6 days ago

Thu, Aug 14 - Mon, Aug 18

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$187 Roundtrip, found 6 days ago

$187

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Thu, Aug 14 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 18, priced at $187 found 6 days ago

Thu, Aug 14 - Mon, Aug 18

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$189 Roundtrip, found 6 days ago

$189

Roundtrip

found 6 days ago

Select American Airlines flight, departing Thu, Aug 14 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Aug 18, priced at $189 found 6 days ago

Wed, Aug 6 - Fri, Aug 15

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$192 Roundtrip, found 12 hours ago

$192

Roundtrip

found 12 hours ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, Aug 15, priced at $192 found 12 hours ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$197 Roundtrip, found 3 days ago

$197

Roundtrip

found 3 days ago

Select United flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $197 found 3 days ago