$39 Cheap Frontier Airlines flights Denver (DEN) to St. Louis (STL)

$39 Cheap Frontier Airlines flights Denver (DEN) to St. Louis (STL)

Prices were available within the past 7 days and start at $39 for one-way flights and $68 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Mar 4 - Sat, Mar 7

DEN

Denver

STL

St. Louis

$68 Roundtrip, found 6 days ago

$68

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Wed, Mar 4 from Denver to St. Louis, returning Sat, Mar 7, priced at $68 found 6 days ago

Fri, Feb 27 - Wed, Mar 4

DEN

Denver

STL

St. Louis

$73 Roundtrip, found 6 days ago

$73

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Fri, Feb 27 from Denver to St. Louis, returning Wed, Mar 4, priced at $73 found 6 days ago

Wed, Mar 4 - Mon, Mar 9

DEN

Denver

STL

St. Louis

$74 Roundtrip, found 6 days ago

$74

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Wed, Mar 4 from Denver to St. Louis, returning Mon, Mar 9, priced at $74 found 6 days ago

Fri, Feb 27 - Mon, Mar 9

DEN

Denver

STL

St. Louis

$79 Roundtrip, found 6 days ago

$79

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Fri, Feb 27 from Denver to St. Louis, returning Mon, Mar 9, priced at $79 found 6 days ago

Wed, Mar 4 - Fri, Mar 6

DEN

Denver

STL

St. Louis

$83 Roundtrip, found 6 days ago

$83

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Wed, Mar 4 from Denver to St. Louis, returning Fri, Mar 6, priced at $83 found 6 days ago

Fri, Feb 27 - Fri, Mar 6

DEN

Denver

STL

St. Louis

$88 Roundtrip, found 6 days ago

$88

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Fri, Feb 27 from Denver to St. Louis, returning Fri, Mar 6, priced at $88 found 6 days ago