Flights from St. Louis to Northglenn

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.

Sat, Sep 27 - Wed, Oct 8

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$108 Roundtrip, found 19 hours ago

$108

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Sat, Sep 27 from Lambert-St. Louis Intl. to Denver Intl., returning Wed, Oct 8, priced at $108 found 19 hours ago

Mon, Sep 29 - Tue, Oct 7

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$118 Roundtrip, found 2 hours ago

$118

Roundtrip

found 2 hours ago

Select Frontier Airlines flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Oct 7, priced at $118 found 2 hours ago

Wed, Jul 23 - Sat, Jul 26

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$120 Roundtrip, found 1 day ago

$120

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jul 23 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Jul 26, priced at $120 found 1 day ago

Fri, Sep 26 - Wed, Oct 8

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$123 Roundtrip, found 19 hours ago

$123

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Wed, Oct 8, priced at $123 found 19 hours ago

Mon, Sep 29 - Tue, Oct 7

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$124 Roundtrip, found 2 hours ago

$124

Roundtrip

found 2 hours ago

Select Frontier Airlines flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Oct 7, priced at $124 found 2 hours ago

Fri, Jul 25 - Mon, Jul 28

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$128 Roundtrip, found 1 day ago

$128

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 25 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Jul 28, priced at $128 found 1 day ago

Mon, Sep 29 - Tue, Oct 7

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$133 Roundtrip, found 2 hours ago

$133

Roundtrip

found 2 hours ago

Select United flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Oct 7, priced at $133 found 2 hours ago

Fri, Sep 26 - Thu, Oct 9

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$137 Roundtrip, found 19 hours ago

$137

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Thu, Oct 9, priced at $137 found 19 hours ago

Mon, Jul 21 - Fri, Jul 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$138 Roundtrip, found 1 day ago

$138

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jul 21 from Lambert-St. Louis Intl. to Denver Intl., returning Fri, Jul 25, priced at $138 found 1 day ago

Wed, Oct 1 - Wed, Oct 8

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$139 Roundtrip, found 6 days ago

$139

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Wed, Oct 1 from Lambert-St. Louis Intl. to Denver Intl., returning Wed, Oct 8, priced at $139 found 6 days ago

Mon, Sep 29 - Tue, Oct 7

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$143 Roundtrip, found 2 hours ago

$143

Roundtrip

found 2 hours ago

Select American Airlines flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Oct 7, priced at $143 found 2 hours ago

Fri, Jul 25 - Sat, Jul 26

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$144 Roundtrip, found 1 day ago

$144

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 25 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Jul 26, priced at $144 found 1 day ago

Mon, Sep 29 - Tue, Oct 7

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$153 Roundtrip, found 2 hours ago

$153

Roundtrip

found 2 hours ago

Select Delta flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Oct 7, priced at $153 found 2 hours ago

Mon, Sep 29 - Tue, Oct 7

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$157 Roundtrip, found 2 hours ago

$157

Roundtrip

found 2 hours ago

Select United flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Oct 7, priced at $157 found 2 hours ago

Sat, Sep 27 - Tue, Sep 30

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$158 Roundtrip, found 3 days ago

$158

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Sep 27 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Sep 30, priced at $158 found 3 days ago

Wed, Oct 1 - Sun, Oct 5

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$163 Roundtrip, found 1 day ago

$163

Roundtrip

found 1 day ago

Select American Airlines flight, departing Wed, Oct 1 from Lambert-St. Louis Intl. to Denver Intl., returning Sun, Oct 5, priced at $163 found 1 day ago

Mon, Sep 29 - Tue, Oct 7

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$167 Roundtrip, found 2 hours ago

$167

Roundtrip

found 2 hours ago

Select United flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Oct 7, priced at $167 found 2 hours ago

Wed, Jul 30 - Wed, Aug 6

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$172 Roundtrip, found 21 hours ago

$172

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Wed, Jul 30 from Lambert-St. Louis Intl. to Denver Intl., returning Wed, Aug 6, priced at $172 found 21 hours ago

Mon, Sep 29 - Tue, Oct 7

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$173 Roundtrip, found 2 hours ago

$173

Roundtrip

found 2 hours ago

Select American Airlines flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Oct 7, priced at $173 found 2 hours ago

Mon, Sep 29 - Tue, Oct 7

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$173 Roundtrip, found 2 hours ago

$173

Roundtrip

found 2 hours ago

Select Frontier Airlines flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Oct 7, priced at $173 found 2 hours ago