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Cheap flights from Chicago (CHI) to Denver (DEN)

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How to find the cheapest flight from Chicago (CHI) to Denver (DEN)

How to find the cheapest flight from Chicago (CHI) to Denver (DEN)
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How to find the cheapest flight from Chicago (CHI) to Denver (DEN)
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How to find the cheapest flight from Chicago (CHI) to Denver (DEN)
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Cheap flights from Chicago to Denver in December 2025 , January 2026

24 Dec - 12 Jan $ 149.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates
24 Dec - 09 Jan $ 171.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
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24 Dec - 01 Jan $ 206.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates

Last minute flights from Chicago to Denver

24 Dec - 31 Dec $ 146.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates
26 Dec - 31 Dec $ 154.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates
25 Dec - 31 Dec $ 183.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates

One-way flights to Denver from Chicago

7:00 AM - 7:00 AM
Frontier Airlines
0 Stops
2h 56m
CHI - DEN
$ 107
Kiwi
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7:00 AM - 7:00 AM
Frontier Airlines
0 Stops
2h 56m
CHI - DEN
$ 115
Kiwi
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8:45 AM - 8:45 AM
United Airlines
0 Stops
2h 50m
CHI - DEN
$ 299
Kiwi
Pick dates

How to find the cheapest flight from Chicago (CHI) to Denver (DEN)

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