Earn point on your loyalty program!arrow arc left

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

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

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

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.
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.

Cheap flights from Chicago to Denver in March , April 2026

12 Mar - 19 Apr $ 130.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
DIRECT
CHI
Chicago
Pick dates
12 Mar - 08 Apr $ 162.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
1 STOPS
CHI
Chicago
Pick dates
06 Mar - 19 Apr $ 610.00
CHI
Chicago
United Airlines
DIRECT
DEN
Denver
DEN
Denver
United Airlines
DIRECT
CHI
Chicago
Pick dates

Last minute flights from Chicago to Denver

12 Mar - 31 Mar $ 177.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
1 STOPS
CHI
Chicago
Pick dates
13 Mar - 31 Mar $ 177.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
1 STOPS
CHI
Chicago
Pick dates
08 Mar - 31 Mar $ 215.00
CHI
Chicago
Frontier Airlines
DIRECT
DEN
Denver
DEN
Denver
Frontier Airlines
1 STOPS
CHI
Chicago
Pick dates

One-way flights to Denver from Chicago

10:53 AM - 10:53 AM
Frontier Airlines
0 Stops
2h 59m
CHI - DEN
$ 76
Kiwi
Pick dates
6:20 PM - 6:20 PM
Frontier Airlines
0 Stops
3h 4m
CHI - DEN
$ 76
Kiwi
Pick dates
9:39 PM - 9:39 PM
United Airlines
0 Stops
2h 51m
CHI - DEN
$ 130
Kiwi
Pick dates

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

Related info for your journey
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.
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.