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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 September , October 2026

30 Sep - 17 Oct $ 268.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates
29 Sep - 08 Oct $ 362.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates
29 Sep - 05 Oct $ 370.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates

Last minute flights from Chicago to Denver

30 Sep - 30 Sep $ 378.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates
29 Sep - 30 Sep $ 378.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates
27 Sep - 30 Sep $ 584.00
CHI
Chicago
United Airlines
DIRECT
DEN
Denver
DEN
Denver
United Airlines
DIRECT
CHI
Chicago
Pick dates

One-way flights to Denver from Chicago

6:30 AM - 6:30 AM
Frontier Airlines
0 Stops
2h 45m
CHI - DEN
$ 188
Kiwi
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6:30 AM - 6:30 AM
Frontier Airlines
0 Stops
2h 45m
CHI - DEN
$ 188
Kiwi
Pick dates
6:00 AM - 6:00 AM
United Airlines
0 Stops
2h 38m
CHI - DEN
$ 312
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.