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Cheap flights from St Louis (STL) to Denver (DEN)

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0 Children (2~11)
0 Infants (0~2)
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How to find the cheapest flight from St Louis (STL) to Denver (DEN)

How to find the cheapest flight from St Louis (STL) to Denver (DEN)
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How to find the cheapest flight from St Louis (STL) to Denver (DEN)
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How to find the cheapest flight from St Louis (STL) to Denver (DEN)
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Cheap flights from St Louis to Denver in January , February 2026

31 Jan - 11 Feb $ 83.00
STL
St Louis
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
STL
St Louis
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21 Jan - 07 Feb $ 112.00
STL
St Louis
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
STL
St Louis
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19 Jan - 06 Feb $ 153.00
STL
St Louis
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
STL
St Louis
Pick dates

Last minute flights from St Louis to Denver

28 Jan - 31 Jan $ 108.00
STL
St Louis
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
STL
St Louis
Pick dates
21 Jan - 31 Jan $ 133.00
STL
St Louis
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
STL
St Louis
Pick dates
19 Jan - 31 Jan $ 153.00
STL
St Louis
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
STL
St Louis
Pick dates

One-way flights to Denver from St Louis

3:46 PM - 3:46 PM
Frontier Airlines
0 Stops
2h 37m
STL - DEN
$ 54
Kiwi
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3:46 PM - 3:46 PM
Frontier Airlines
0 Stops
2h 37m
STL - DEN
$ 79
Kiwi
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7:36 PM - 7:36 PM
Frontier Airlines
0 Stops
2h 32m
STL - DEN
$ 99
Kiwi
Pick dates

How to find the cheapest flight from St Louis (STL) to Denver (DEN)

Related info for your journey
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How to find the cheapest flight from St Louis (STL) to Denver (DEN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Denver (DEN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.