Find cheap flights from Illinois to Denver

DEN

Find cheap flights from Illinois to Denver

Round-trip
Economy
Washington (WAS)
Denver Intl
Sat 7/4
Sat 7/11
Any month
Compare vs. KAYAK |
Search hundreds of travel sites at once for deals on flights to Denver

Good to know

Low season

October Best time to beat the crowds with an average 3% drop in price.

High season

December Most popular time to fly with an average 12% increase in price.

Average price of a round-trip

$269 (avg. price over the last 2 weeks)

Good deal for a round-trip

$100 or less

FAQs for booking Illinois to Denver flights

How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?

Top 5 airlines serving Illinois to Denver Intl

Scores according to KAYAK customer reviews

8.0
Delta
Overall score based on 28,423 reviews
8.2
Boarding
7.8
Comfort
8.5
Crew
7.8
Entertainment
7.5
Food
Airline reviews
Read more about Delta

Book cheap flights from Illinois to Denver (round-trip)

Airports
Origin
Chicago
$42
only
$42
$146
only
$146
Peoria
$260
only
$260
Destination
Denver
$42
only
$42
Tue, Aug 11
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Sat, Aug 15
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 41m
Trip: 5 days
Based on null reviews
Tue, Jul 28
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Tue, Aug 4
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 27m
Trip: 8 days
Based on null reviews
Wed, Aug 5
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Wed, Aug 12
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 41m
Trip: 8 days
Based on null reviews
Wed, Aug 5
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Tue, Aug 11
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 41m
Trip: 7 days
Based on null reviews
Wed, Aug 5
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 43m
Tue, Aug 11
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 41m
Trip: 7 days
Based on null reviews
Sat, Aug 8
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Sat, Aug 15
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 38m
Trip: 8 days
Based on null reviews
Wed, Aug 5
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Fri, Aug 7
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 34m
Trip: 3 days
Based on null reviews
Sun, Aug 9
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Fri, Aug 14
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 41m
Trip: 6 days
Based on null reviews
Sun, Aug 16
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Sat, Aug 22
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 29m
Trip: 7 days
Based on null reviews
Wed, Sep 16
MDW
Chicago Midway Airport
DEN
Denver Airport
6h 54m
Sun, Sep 20
DEN
Denver Airport
MDW
Chicago Midway Airport
4h 44m
Trip: 5 days
Based on null reviews
Mon, Aug 10
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Mon, Aug 10
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 41m
Trip: 1 days
Based on null reviews
Sat, Aug 15
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Tue, Aug 18
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 18m
Trip: 4 days
Based on null reviews
Tue, Aug 11
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Fri, Aug 14
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 41m
Trip: 4 days
Based on null reviews
Mon, Aug 3
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Wed, Aug 5
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 41m
Trip: 3 days
Based on null reviews
Fri, Aug 7
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 42m
Sat, Aug 15
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 41m
Trip: 9 days
Based on null reviews
Tue, Jul 28
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Sun, Aug 2
DEN
Denver Airport
ORD
Chicago O'Hare Airport
10h 06m
Trip: 6 days
Based on null reviews
Thu, Sep 10
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 53m
Wed, Sep 16
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 31m
Trip: 7 days
Based on null reviews
Sat, Aug 8
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Wed, Aug 12
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 41m
Trip: 5 days
Based on null reviews
Wed, Aug 19
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 37m
Fri, Aug 28
DEN
Denver Airport
ORD
Chicago O'Hare Airport
2h 29m
Trip: 10 days
Based on null reviews
Fri, Aug 14
PIA
Greater Peoria
DEN
Denver Airport
8h 08m
Sat, Aug 15
DEN
Denver Airport
PIA
Greater Peoria
8h 10m
Trip: 2 days
Based on null reviews

Book cheap flights from Illinois to Denver (one-way)

Airports
Origin
Chicago
$22
only
$22
$73
only
$73
Peoria
$167
only
$167
Champaign
$206
only
$206
Destination
Denver
$22
only
$22
Wed, Aug 5
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Based on null reviews
Tue, Jul 21
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Based on null reviews
Sun, Jul 26
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Based on null reviews
Tue, Jul 14
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Based on null reviews
Tue, Sep 8
MDW
Chicago Midway Airport
DEN
Denver Airport
4h 50m
Based on null reviews
Mon, Aug 3
ORD
Chicago O'Hare Airport
DEN
Denver Airport
22h 54m
Based on null reviews
Sat, Aug 8
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Based on null reviews
Tue, Jul 14
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Based on null reviews
Tue, Aug 4
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Based on null reviews
Thu, Aug 6
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 40m
Based on null reviews
Thu, Aug 6
ORD
Chicago O'Hare Airport
DEN
Denver Airport
6h 10m
Based on null reviews
Sat, Jul 4
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Based on null reviews
Mon, Jul 27
ORD
Chicago O'Hare Airport
DEN
Denver Airport
22h 54m
Based on null reviews
Wed, Jul 29
PIA
Greater Peoria
DEN
Denver Airport
39h 33m
Based on null reviews
Sun, Jul 19
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Based on null reviews
Mon, Jul 20
ORD
Chicago O'Hare Airport
DEN
Denver Airport
22h 54m
Based on null reviews
Mon, Jul 13
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Based on null reviews
Wed, Jul 15
CMI
Champaign University-Willard
DEN
Denver Airport
5h 26m
Based on null reviews
Sun, Jul 26
ORD
Chicago O'Hare Airport
DEN
Denver Airport
2h 39m
Based on null reviews
Wed, Jul 15
CMI
Champaign University-Willard
DEN
Denver Airport
9h 03m
Based on null reviews
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

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At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Why aren’t prices accurate 100% of the time?
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