Find Cheap Flights from Chicago to Denver International (CHI - DEN)

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Thu 11/23
Thu 11/30
Any month
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Good to Know

Low Season:
January
Best time to beat the crowds
2%
expected price decrease
High Season:
July
Most popular time to fly
15%
expected price increase
Average Price:
$521
(avg. price over the last 2 weeks)
Good Deal:
$326
or less (round trip)

When to Book Flights from Chicago to Denver International

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $326 or less.
The cheapest flight from Chicago to Denver International was found 29 days before departure, on average.
Book at least 2 weeks before departure in order to get a below-average price.
High season is considered to be June, July and August. The cheapest month to fly is January.
Morning departure is around 4% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Chicago to Denver International Flights

How long does a flight from Chicago to Denver International take?
An average nonstop flight takes 2h 44m, covering a distance of 900 miles.
How many flights are there between Chicago and Denver International?
There are 1,120 (nonstop) flights between Chicago and Denver International per week, averaging 167 per day.
Which airlines provide the cheapest flights from Chicago to Denver International?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($50), Spirit Airlines ($59) and Multiple Airlines ($61).
Do I need a passport to fly between Chicago and Denver International?
No.
Which airlines fly most frequently between Chicago and Denver International?
Air Canada (28 times daily), United (27 times daily), Southwest (19 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Chicago to Denver International?
For Chicago to Denver International, Monday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Denver International back to Chicago, the best deals are generally found on Thursday, with Wednesday being the most expensive.

Book cheap flights from Chicago to Denver International (round-trip)

Airports
Origin
Chicago
$50
only
$50
Destination
Denver
$50
only
$50
Mon, Jan 22
ORD
DEN
2h 44m
Thu, Jan 25
DEN
ORD
2h 38m
Trip: 4 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 259 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ORD
DEN
Mediocre 2.6

What I liked? That the flight ended and I could get off the plane.

They charged to pick seats. They charged to carry on a bag. They charged for any drinks. The seats had NO padding. The seats didn't recline. The gate at O'Hare was dark and dirty. The travelers in my flight would have scared the residents of Mos Eisley.

ORD
DEN
Good 6.3

Crew was very pleasant. We were able to board easily. Like the newer seats that don't take up so much space so there is more leg room.

Cabin was freezing, until one of the crew came back and adjusted it.

ORD
DEN
Mediocre 2.6

Getting off the plane

Being in the plane

ORD
DEN
Mediocre 2.0

Airline did not let us fly 45 min prior to the departing time, we were a party of 10 people; half of us checked in online and had payed baggage fees online but when ww got to the counter airline assosiate said we did not check in. Not only dod we loose our tickets but also the money for the fees we had already payed for. I had an uderstandong that the gates closed 10 min prior not 45. We had to fly becuase we had an emergency and this inconvinience just made our experince horrible. Defenetly dissapointed.

ORD
DEN
Good 6.6

It was cheap. The boarding was smooth. It wasn't overbooked. There was space for my carryon. Crew was nice. Was on time.

No free beverage. Small seats and no leg room. Not happy about the carryon charge but whatever.

Wed, Dec 6
ORD
DEN
2h 49m
Sat, Dec 9
DEN
ORD
2h 24m
Trip: 4 days
5.1OkayShow reviews
Overall 5.1 Okay
Based on 308 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
ORD
DEN
Mediocre 2.0

I was unable to catch my flight because of Spirit's unreasonable polocies. On paper it seems like a good airline, but in practice there's a lot of dissapointment.

ORD
DEN
Mediocre 2.0

Watching people argue with spirit staff! Kept me entertained for my 2 hour delay...

How rude and unapologetic the spirit staff was. It was their only instinct in response to their lack of knowledge to the situation.

ORD
DEN
Excellent 8.0

Staff was excellent! Very attentive and accommodating. They care about their passengers!

The seats were so close together near the back of the plane that we could not put our laptop on the tray in front of us. Also the seats did not recline!

ORD
DEN
Mediocre 2.0

Spirit Airlines must make all their money on carry-on charges. Although I measured the dimension of my bag, it was slightly outside of fitting in their metal box at check-in, which cost over $50 when it still for in overhead no issues.

ORD
DEN
Mediocre 3.5

Staff was friendly

No leg room and small seats!! I am a 5'5'', 120lb person and I barely fit in the seat and no room to put my legs. Can't imagine what a tall person would feel like!! No apologies for delayed flight and gate changes

Mon, Jan 8
ORD
DEN
2h 44m
Thu, Feb 1
DEN
ORD
2h 31m
Trip: 25 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Jan 28
ORD
DEN
2h 44m
Thu, Feb 1
DEN
ORD
2h 34m
Trip: 5 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 39 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
ORD
DEN
Excellent 8.0

More improved than the last trip I took with AA to Denver. Efficient boarding.

ORD
DEN
Mediocre 2.0

Missed that flight because my finair was delayed at Helsinki

ORD
DEN
Excellent 8.0

I liked sitting next to my friends.

Lack of leg room

ORD
DEN
Okay 5.6

The departure time. This left enough time to get to the airport and go through security without rushing!

Sitting in the middle Paying for luggage ( I wish Southwest flew out of ORD)

ORD
DEN
Mediocre 3.3

They showed American ninja warrior.

Everything. The flight was delayed greatly even though the plane got to Chicago only slightly late. Then they make us board and just sit in the plane for an hour. Then finally we start moving, the plane is uncomfortably hot even with the air blowing on me, the flight attendants look like they hate their life, it was honestly horrible and I will never fly with American Airlines EVER again.

Mon, Dec 11
ORD
DEN
2h 49m
Thu, Dec 14
DEN
ORD
2h 24m
Trip: 4 days
5.1OkayShow reviews
Overall 5.1 Okay
Based on 308 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
ORD
DEN
Mediocre 3.3

I think charging for water is absurd.

ORD
DEN
Mediocre 2.0

Spirit Airlines must make all their money on carry-on charges. Although I measured the dimension of my bag, it was slightly outside of fitting in their metal box at check-in, which cost over $50 when it still for in overhead no issues.

ORD
DEN
Okay 4.6

Flight wa direct and on time

Crowded!!! Seats too small- middle person spilling over into other seat soaces

ORD
DEN
Excellent 8.6

The crew was very attentive and professional. The seats were VERY roomy and we even had leg room! No other flights I've taken in the last ten years have had that much room in coach, it was like first class.

ORD
DEN
Excellent 8.0

Staff was excellent! Very attentive and accommodating. They care about their passengers!

The seats were so close together near the back of the plane that we could not put our laptop on the tray in front of us. Also the seats did not recline!

Tue, Jan 9
ORD
DEN
2h 44m
Thu, Feb 1
DEN
ORD
2h 31m
Trip: 24 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Jan 27
ORD
DEN
2h 44m
Fri, Feb 2
DEN
ORD
2h 38m
Trip: 7 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 259 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ORD
DEN
Okay 5.0

Fast boarding and that's the only good quality. No refreshments or snacks offered without a price tag included. Seats don't recline. Uncomfortable hard seats without any head rests for Support. Small tray tables that won't hold a laptop or drink.

It's been 45+ minutes after landing that we have been stuck on the runway unable to dock the plane due to some delays. How Terrible is it that the pilot gets on the radio to say he has no updates or much information to give! People are antsy, children crying and this delays all passengers with other accommodations. Seems like there's no communication or organization from Frontier at all!!'

ORD
DEN
Excellent 9.6

price, updates and friendliness

ORD
DEN
Okay 5.0

$45.00 for a bag is rediculous.

ORD
DEN
Mediocre 2.0

Nothing was positive while using Frontier Airlines

Everything was pretty unpleasant: 1.) hidden baggage fees ($45 round trip would be one thing for a CHECKED BAG, but $90 collectively for the round trip is FRAUDULENT) Especially when most airlines don't charge for carry on bags or it's at least calculated in the final cost. At first when I booked this trip with FRONTIER $180 for my tickets looked like a decent deal, UNTIL I WAS TOLD AT THE COUNTER THAT I HAVE TO PAY $45 each way for a FRIGGIN CARRY ON BAG!! turning my reasonable and anticipated $180 trip turned into almost a $300 (NEARLY doubled my cost!) had I known I could have at least packed more into a checked bag for that price. 2.) my flight was delayed 4 hours on my outgoing flight, cutting into my personal time off and no compensation or even a kind gesture like a free McDonald's sandwich when you land...you guys really have poor quality and seem like you don't really care about the paying customer 3.) staff seemed clueless and didn't know how to answer customers questions as to why our flight was delayed!! 4.) mechanical issues with plane were the cause, or at least that's what the copilot or captain Just HAD TO MENTION TO US RIGHT BEFORE TAKEOFF, causing everyone to stir and raise eyebrows. 5.) to top off him mentioning the mechanical issues they were having with the plane the flight was rough..I've never been more tense or anxious on any of the other 30+ flights I've taken in my life. Pilot didn't seem to know how to handle turbulence.

ORD
DEN
Excellent 10.0

It was very good! I liked it.

Mon, Dec 11
ORD
DEN
2h 49m
Thu, Dec 14
DEN
ORD
2h 24m
Trip: 4 days
5.1OkayShow reviews
Overall 5.1 Okay
Based on 308 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
ORD
DEN
Mediocre 2.0

Spirit Airlines must make all their money on carry-on charges. Although I measured the dimension of my bag, it was slightly outside of fitting in their metal box at check-in, which cost over $50 when it still for in overhead no issues.

ORD
DEN
Excellent 8.6

Everything was fine, except flight was very late.

Very late. No good reason given.

ORD
DEN
Okay 4.6

Flight wa direct and on time

Crowded!!! Seats too small- middle person spilling over into other seat soaces

ORD
DEN
Mediocre 3.3

I think charging for water is absurd.

ORD
DEN
Okay 4.6

Cheap, on time, convenient flight time

C'mon....charging 3.00 for ice water? Ridiculous!

Wed, Jan 10
ORD
DEN
2h 46m
Thu, Feb 1
DEN
ORD
2h 31m
Trip: 23 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Jan 29
ORD
DEN
2h 46m
Thu, Feb 8
DEN
ORD
2h 23m
Trip: 11 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 259 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ORD
DEN
Mediocre 2.6

What I liked? That the flight ended and I could get off the plane.

They charged to pick seats. They charged to carry on a bag. They charged for any drinks. The seats had NO padding. The seats didn't recline. The gate at O'Hare was dark and dirty. The travelers in my flight would have scared the residents of Mos Eisley.

ORD
DEN
Okay 5.0

$45.00 for a bag is rediculous.

ORD
DEN
Excellent 9.6

price, updates and friendliness

ORD
DEN
Okay 5.0

Fast boarding and that's the only good quality. No refreshments or snacks offered without a price tag included. Seats don't recline. Uncomfortable hard seats without any head rests for Support. Small tray tables that won't hold a laptop or drink.

It's been 45+ minutes after landing that we have been stuck on the runway unable to dock the plane due to some delays. How Terrible is it that the pilot gets on the radio to say he has no updates or much information to give! People are antsy, children crying and this delays all passengers with other accommodations. Seems like there's no communication or organization from Frontier at all!!'

ORD
DEN
Mediocre 2.0

I had broke my phone coming from a music festival so i had no way to call them, traffic and construction made me miss my flight by 20 minutes and they would not help me get another flight or refund my money

Mon, Dec 11
ORD
DEN
2h 49m
Thu, Dec 14
DEN
ORD
2h 24m
Trip: 4 days
5.1OkayShow reviews
Overall 5.1 Okay
Based on 308 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
ORD
DEN
Excellent 8.6

The crew was very attentive and professional. The seats were VERY roomy and we even had leg room! No other flights I've taken in the last ten years have had that much room in coach, it was like first class.

ORD
DEN
Mediocre 2.0

Spirit Airlines must make all their money on carry-on charges. Although I measured the dimension of my bag, it was slightly outside of fitting in their metal box at check-in, which cost over $50 when it still for in overhead no issues.

ORD
DEN
Mediocre 2.0

I was unable to catch my flight because of Spirit's unreasonable polocies. On paper it seems like a good airline, but in practice there's a lot of dissapointment.

ORD
DEN
Excellent 8.6

Everything was fine, except flight was very late.

Very late. No good reason given.

ORD
DEN
Excellent 10.0

Courtesy for fly attendee the time

Sat, Jan 13
ORD
DEN
2h 44m
Thu, Jan 18
DEN
ORD
2h 31m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jan 30
ORD
DEN
2h 46m
Thu, Feb 8
DEN
ORD
2h 38m
Trip: 10 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 259 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ORD
DEN
Good 6.3

Crew was very pleasant. We were able to board easily. Like the newer seats that don't take up so much space so there is more leg room.

Cabin was freezing, until one of the crew came back and adjusted it.

ORD
DEN
Okay 5.0

$45.00 for a bag is rediculous.

ORD
DEN
Mediocre 2.0

I had broke my phone coming from a music festival so i had no way to call them, traffic and construction made me miss my flight by 20 minutes and they would not help me get another flight or refund my money

ORD
DEN
Mediocre 2.6

Getting off the plane

Being in the plane

ORD
DEN
Excellent 10.0

It was very good! I liked it.

Tue, Dec 12
ORD
DEN
2h 49m
Sat, Dec 16
DEN
ORD
2h 24m
Trip: 5 days
5.1OkayShow reviews
Overall 5.1 Okay
Based on 308 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
ORD
DEN
Mediocre 3.3

I think charging for water is absurd.

ORD
DEN
Excellent 10.0

Courtesy for fly attendee the time

ORD
DEN
Mediocre 2.0

I was unable to catch my flight because of Spirit's unreasonable polocies. On paper it seems like a good airline, but in practice there's a lot of dissapointment.

ORD
DEN
Excellent 8.6

The crew was very attentive and professional. The seats were VERY roomy and we even had leg room! No other flights I've taken in the last ten years have had that much room in coach, it was like first class.

ORD
DEN
Excellent 8.0

Staff was excellent! Very attentive and accommodating. They care about their passengers!

The seats were so close together near the back of the plane that we could not put our laptop on the tray in front of us. Also the seats did not recline!

Tue, Jan 16
ORD
DEN
2h 44m
Thu, Jan 18
DEN
ORD
2h 31m
Trip: 3 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jan 31
ORD
DEN
2h 44m
Tue, Feb 13
DEN
ORD
2h 23m
Trip: 14 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 259 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ORD
DEN
Excellent 10.0

It was very good! I liked it.

ORD
DEN
Good 6.3

Crew was very pleasant. We were able to board easily. Like the newer seats that don't take up so much space so there is more leg room.

Cabin was freezing, until one of the crew came back and adjusted it.

ORD
DEN
Okay 5.0

$45.00 for a bag is rediculous.

ORD
DEN
Okay 5.0

Fast boarding and that's the only good quality. No refreshments or snacks offered without a price tag included. Seats don't recline. Uncomfortable hard seats without any head rests for Support. Small tray tables that won't hold a laptop or drink.

It's been 45+ minutes after landing that we have been stuck on the runway unable to dock the plane due to some delays. How Terrible is it that the pilot gets on the radio to say he has no updates or much information to give! People are antsy, children crying and this delays all passengers with other accommodations. Seems like there's no communication or organization from Frontier at all!!'

ORD
DEN
Excellent 9.6

price, updates and friendliness

Wed, Dec 13
ORD
DEN
2h 49m
Sat, Dec 16
DEN
ORD
2h 24m
Trip: 4 days
5.1OkayShow reviews
Overall 5.1 Okay
Based on 308 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
ORD
DEN
Mediocre 2.0

I like nothing about it and the customer service sucked

I hated everything about spirit I was waiting at my gate for about an hour until they announced all last minute that our gate had changed and the flight was boarding when I went over to the new gate there was no one there and the flight had left! 8 people experienced the same thing and missed their flight. The manager who came to save us was rude and did absolutely nothing about it. I had to find another flight on my own and pay extra and reschedule my car rental and hotel reservations. By far the worst experience I've had at the airport please don't be cheap and think you are saving with spirit, they are a headache and worst service ever!!

ORD
DEN
Excellent 8.0

Staff was excellent! Very attentive and accommodating. They care about their passengers!

The seats were so close together near the back of the plane that we could not put our laptop on the tray in front of us. Also the seats did not recline!

ORD
DEN
Excellent 10.0

Courtesy for fly attendee the time

ORD
DEN
Excellent 8.6

The crew was very attentive and professional. The seats were VERY roomy and we even had leg room! No other flights I've taken in the last ten years have had that much room in coach, it was like first class.

ORD
DEN
Mediocre 3.3

I think charging for water is absurd.

Wed, Jan 17
ORD
DEN
2h 44m
Thu, Jan 18
DEN
ORD
2h 31m
Trip: 2 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Feb 3
ORD
DEN
2h 44m
Tue, Feb 13
DEN
ORD
2h 38m
Trip: 11 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 259 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ORD
DEN
Good 6.3

Crew was very pleasant. We were able to board easily. Like the newer seats that don't take up so much space so there is more leg room.

Cabin was freezing, until one of the crew came back and adjusted it.

ORD
DEN
Okay 5.0

$45.00 for a bag is rediculous.

ORD
DEN
Okay 5.0

Fast boarding and that's the only good quality. No refreshments or snacks offered without a price tag included. Seats don't recline. Uncomfortable hard seats without any head rests for Support. Small tray tables that won't hold a laptop or drink.

It's been 45+ minutes after landing that we have been stuck on the runway unable to dock the plane due to some delays. How Terrible is it that the pilot gets on the radio to say he has no updates or much information to give! People are antsy, children crying and this delays all passengers with other accommodations. Seems like there's no communication or organization from Frontier at all!!'

ORD
DEN
Mediocre 2.6

What I liked? That the flight ended and I could get off the plane.

They charged to pick seats. They charged to carry on a bag. They charged for any drinks. The seats had NO padding. The seats didn't recline. The gate at O'Hare was dark and dirty. The travelers in my flight would have scared the residents of Mos Eisley.

ORD
DEN
Mediocre 2.0

Airline did not let us fly 45 min prior to the departing time, we were a party of 10 people; half of us checked in online and had payed baggage fees online but when ww got to the counter airline assosiate said we did not check in. Not only dod we loose our tickets but also the money for the fees we had already payed for. I had an uderstandong that the gates closed 10 min prior not 45. We had to fly becuase we had an emergency and this inconvinience just made our experince horrible. Defenetly dissapointed.

Fri, Dec 15
ORD
DEN
2h 49m
Sat, Dec 16
DEN
ORD
2h 24m
Trip: 2 days
5.1OkayShow reviews
Overall 5.1 Okay
Based on 308 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
ORD
DEN
Mediocre 3.3

I think charging for water is absurd.

ORD
DEN
Excellent 8.6

Everything was fine, except flight was very late.

Very late. No good reason given.

ORD
DEN
Excellent 10.0

Courtesy for fly attendee the time

ORD
DEN
Okay 4.6

Cheap, on time, convenient flight time

C'mon....charging 3.00 for ice water? Ridiculous!

ORD
DEN
Mediocre 3.5

Staff was friendly

No leg room and small seats!! I am a 5'5'', 120lb person and I barely fit in the seat and no room to put my legs. Can't imagine what a tall person would feel like!! No apologies for delayed flight and gate changes

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.