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.

Sat, May 31 - Sat, Jun 7

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$218 Roundtrip, found 6 days ago

$218

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, May 31 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Jun 7, priced at $218 found 6 days ago

Sat, May 31 - Wed, Jun 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$239 Roundtrip, found 6 days ago

$239

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, May 31 from Denver Intl. to Lambert-St. Louis Intl., returning Wed, Jun 4, priced at $239 found 6 days ago

Sat, May 31 - Fri, Jun 6

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$249 Roundtrip, found 6 days ago

$249

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, May 31 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, Jun 6, priced at $249 found 6 days ago

Sat, May 31 - Tue, Jun 10

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$259 Roundtrip, found 6 days ago

$259

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, May 31 from Denver Intl. to Lambert-St. Louis Intl., returning Tue, Jun 10, priced at $259 found 6 days ago

Sat, May 31 - Mon, Jun 9

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$263 Roundtrip, found 6 days ago

$263

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, May 31 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Jun 9, priced at $263 found 6 days ago