Flights from Denver to Frontenac

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 - Sat, Sep 6

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$158 Roundtrip, found 2 days ago

$158

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Aug 26 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Sep 6, priced at $158 found 2 days ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$159 Roundtrip, found 1 day ago

$159

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $159 found 1 day ago

Thu, Aug 28 - Sat, Sep 6

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$168 Roundtrip, found 2 days ago

$168

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Aug 28 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Sep 6, priced at $168 found 2 days ago

Tue, Aug 26 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$169 Roundtrip, found 2 days ago

$169

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Aug 26 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $169 found 2 days ago

Tue, Aug 26 - Mon, Sep 1

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$178 Roundtrip, found 2 days ago

$178

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Tue, Aug 26 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Sep 1, priced at $178 found 2 days ago

Thu, Aug 28 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$179 Roundtrip, found 2 days ago

$179

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Aug 28 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $179 found 2 days ago

Thu, Aug 28 - Mon, Sep 1

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$188 Roundtrip, found 2 days ago

$188

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Aug 28 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, Sep 1, priced at $188 found 2 days ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$213 Roundtrip, found 1 day ago

$213

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $213 found 1 day ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$214 Roundtrip, found 1 day ago

$214

Roundtrip

found 1 day ago

Select United flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $214 found 1 day ago

Mon, Sep 1 - Sat, Sep 6

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$218 Roundtrip, found 2 days ago

$218

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Sep 1 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Sep 6, priced at $218 found 2 days ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$224 Roundtrip, found 1 day ago

$224

Roundtrip

found 1 day ago

Select American Airlines flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $224 found 1 day ago

Mon, Sep 1 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$229 Roundtrip, found 2 days ago

$229

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Mon, Sep 1 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $229 found 2 days ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$247 Roundtrip, found 1 day ago

$247

Roundtrip

found 1 day ago

Select United flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $247 found 1 day ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$249 Roundtrip, found 1 day ago

$249

Roundtrip

found 1 day ago

Select United flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $249 found 1 day ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$257 Roundtrip, found 1 day ago

$257

Roundtrip

found 1 day ago

Select United flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $257 found 1 day ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$259 Roundtrip, found 1 day ago

$259

Roundtrip

found 1 day ago

Select Delta flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $259 found 1 day ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$267 Roundtrip, found 1 day ago

$267

Roundtrip

found 1 day ago

Select American Airlines flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $267 found 1 day ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$267 Roundtrip, found 1 day ago

$267

Roundtrip

found 1 day ago

Select Delta flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $267 found 1 day ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$269 Roundtrip, found 1 day ago

$269

Roundtrip

found 1 day ago

Select Delta flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $269 found 1 day ago

Fri, Aug 29 - Thu, Sep 4

DEN

Denver Intl.

STL

Lambert-St. Louis Intl.

$274 Roundtrip, found 1 day ago

$274

Roundtrip

found 1 day ago

Select American Airlines flight, departing Fri, Aug 29 from Denver Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $274 found 1 day ago