Flights from St. Louis to Aurora

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 - Sat, Oct 4

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$129 Roundtrip, found 15 hours ago

$129

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Sat, Sep 27 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Oct 4, priced at $129 found 15 hours ago

Thu, Sep 25 - Sat, Oct 4

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$133 Roundtrip, found 15 hours ago

$133

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Thu, Sep 25 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Oct 4, priced at $133 found 15 hours ago

Fri, Sep 26 - Tue, Sep 30

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$135 Roundtrip, found 6 days ago

$135

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Sep 30, priced at $135 found 6 days ago

Fri, Sep 26 - Sat, Oct 4

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$138 Roundtrip, found 15 hours ago

$138

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Oct 4, priced at $138 found 15 hours ago

Sat, Jul 26 - Wed, Jul 30

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$139 Roundtrip, found 4 days ago

$139

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sat, Jul 26 from Lambert-St. Louis Intl. to Denver Intl., returning Wed, Jul 30, priced at $139 found 4 days ago

Fri, Sep 26 - Mon, Oct 6

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$143 Roundtrip, found 15 hours ago

$143

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Oct 6, priced at $143 found 15 hours ago

Fri, Sep 26 - Sun, Oct 5

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$149 Roundtrip, found 15 hours ago

$149

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Sun, Oct 5, priced at $149 found 15 hours ago

Fri, Sep 26 - Tue, Sep 30

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$151 Roundtrip, found 6 days ago

$151

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Sep 30, priced at $151 found 6 days ago

Fri, Sep 26 - Tue, Sep 30

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$153 Roundtrip, found 6 days ago

$153

Roundtrip

found 6 days ago

Select American Airlines flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Sep 30, priced at $153 found 6 days ago

Fri, Sep 26 - Tue, Sep 30

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$153 Roundtrip, found 6 days ago

$153

Roundtrip

found 6 days ago

Select United flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Sep 30, priced at $153 found 6 days ago

Mon, Sep 29 - Thu, Oct 2

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$157 Roundtrip, found 1 day ago

$157

Roundtrip

found 1 day ago

Select United flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Thu, Oct 2, priced at $157 found 1 day ago

Sun, Sep 28 - Tue, Oct 7

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$163 Roundtrip, found 15 hours ago

$163

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Sun, Sep 28 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Oct 7, priced at $163 found 15 hours ago

Fri, Sep 26 - Tue, Sep 30

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$163 Roundtrip, found 6 days ago

$163

Roundtrip

found 6 days ago

Select United flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Sep 30, priced at $163 found 6 days ago

Fri, Sep 26 - Tue, Sep 30

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$165 Roundtrip, found 6 days ago

$165

Roundtrip

found 6 days ago

Select Delta flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Sep 30, priced at $165 found 6 days ago

Fri, Sep 26 - Tue, Sep 30

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$166 Roundtrip, found 6 days ago

$166

Roundtrip

found 6 days ago

Select United flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Tue, Sep 30, priced at $166 found 6 days ago

Mon, Sep 29 - Thu, Oct 2

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$167 Roundtrip, found 1 day ago

$167

Roundtrip

found 1 day ago

Select United flight, departing Mon, Sep 29 from Lambert-St. Louis Intl. to Denver Intl., returning Thu, Oct 2, priced at $167 found 1 day ago

Sun, Sep 28 - Mon, Sep 29

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$168 Roundtrip, found 1 day ago

$168

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Sep 28 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Sep 29, priced at $168 found 1 day ago

Wed, Jul 23 - Mon, Jul 28

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$170 Roundtrip, found 4 days ago

$170

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Wed, Jul 23 from Lambert-St. Louis Intl. to Denver Intl., returning Mon, Jul 28, priced at $170 found 4 days ago

Fri, Sep 26 - Thu, Oct 9

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$173 Roundtrip, found 1 day ago

$173

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Thu, Oct 9, priced at $173 found 1 day ago

Fri, Aug 1 - Wed, Aug 6

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$173 Roundtrip, found 4 days ago

$173

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Aug 1 from Lambert-St. Louis Intl. to Denver Intl., returning Wed, Aug 6, priced at $173 found 4 days ago