How far in advance should I book tickets for a flight with United Airlines from Chicago to Denver?

Generally, when trying to get a below average price for your ticket, try to book around 14 days before departure. For the cheapest possible price, our data suggests booking 75 days before departure.

Is United Airlines the cheapest airline to fly with from Chicago to Denver?

With an average price of $298 return, United Airlines is not the cheapest airline to fly from Chicago to Denver with. Instead, for the lowest price, our data suggests flying with Frontier, where a return flight costs $121 on average.

What is the cheapest United Airlines flight from Chicago to Denver?

In the last 3 days, the lowest price for a flight with United Airlines from Chicago to Denver was $63 for a return flight and $44 for a one-way flight.

Does United Airlines fly direct to Denver from Chicago?

Yes, United Airlines does offer direct flights for the route, with around 60 flights per week.

What’s the cheapest day of the week to fly from Chicago to Denver with United Airlines?

On average, the cheapest day of the week to fly from Chicago to Denver with United Airlines is Wednesday, when prices are around $73. The most expensive day is generally Saturday, where the average price is around $107.

What’s the cheapest month to fly from Chicago to Denver with United Airlines?

The cheapest month for United Airlines flights to Denver from Chicago is generally September, where plane tickets cost $154 on average. If possible, try to avoid the most expensive months of June and January, where tickets cost $221 and $240 respectively.

$80 Cheap United Airlines Flights from Chicago to Denver

CHI - DEN

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Cheap United Airlines Flight Deals from Chicago to Denver

Here are some of the best deals found on KAYAK recently from United Airlines for round-trip flights from Chicago to Denver that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Round-trip

One-way

Last minute

Direct

Recent round-trip United Airlines flight deals from Chicago to Denver

Recommended round-trip United Airlines deals departing in the coming months from Chicago to Denver.

Discover the best prices and deals for you by selecting your travel dates.

Choose your dates

7:10 am - 9:06 amORD-DEN

2h 56mnonstop

8:57 pm - 12:29 amDEN-ORD

2h 32mnonstop

$170United Airlines

Find Deal

Thu, May 15 - Mon, May 19

9:15 pm - 11:10 pmORD-DEN

2h 55mnonstop

6:02 am - 9:34 amDEN-ORD

2h 32mnonstop

$187United Airlines

Find Deal

Thu, Apr 24 - Sun, Apr 27

9:17 pm - 11:12 pmORD-DEN

2h 55mnonstop

8:57 pm - 12:29 amDEN-ORD

2h 32mnonstop

$201United Airlines

Find Deal

Fri, May 16 - Sun, May 18

1:15 pm - 2:57 pmORD-DEN

2h 42mnonstop

6:00 am - 9:41 amDEN-ORD

2h 41mnonstop

$205United Airlines

Find Deal

Sat, May 24 - Mon, May 26

10:17 pm - 12:07 amORD-DEN

2h 50mnonstop

6:00 am - 9:41 amDEN-ORD

2h 41mnonstop

$206United Airlines

Find Deal

Sat, Jul 5 - Sat, Jul 12

7:10 am - 9:06 amORD-DEN

2h 56mnonstop

8:57 pm - 12:29 amDEN-ORD

2h 32mnonstop

$219United Airlines

Find Deal

Wed, May 14 - Wed, May 21

5:55 pm - 7:50 pmORD-DEN

2h 55mnonstop

7:35 pm - 11:07 pmDEN-ORD

2h 32mnonstop

$220United Airlines

Find Deal

Tue, Apr 29 - Wed, May 7

7:10 am - 9:06 amORD-DEN

2h 56mnonstop

8:57 pm - 12:29 amDEN-ORD

2h 32mnonstop

$224United Airlines

Find Deal

Thu, May 15 - Tue, May 20

9:17 pm - 11:12 pmORD-DEN

2h 55mnonstop

5:45 pm - 9:17 pmDEN-ORD

2h 32mnonstop

$225United Airlines

Find Deal

Thu, May 1 - Sat, May 10

9:17 pm - 11:12 pmORD-DEN

2h 55mnonstop

6:00 am - 9:33 amDEN-ORD

2h 33mnonstop

$229United Airlines

Find Deal

Thu, May 15 - Mon, May 19

Low season	January
High season	July
Cheapest flight	$80
Average price round-trip	$191
Good deal one-way	$643

Best time to beat the crowds but there is an average 4% increase in price.

Most popular time to fly with an average 4% increase in price.

Flight from Chicago O'Hare Airport to Denver

(avg. price over the last 2 weeks)

or less

When to Book Flights with United Airlines from Chicago to Denver

Average price per month

Flight prices as travel date approaches

How far in advance should I book tickets for a flight with United Airlines from Chicago to Denver?
Generally, when trying to get a below average price for your ticket, try to book around 14 days before departure. For the cheapest possible price, our data suggests booking 75 days before departure.
Is United Airlines the cheapest airline to fly with from Chicago to Denver?
With an average price of $298 return, United Airlines is not the cheapest airline to fly from Chicago to Denver with. Instead, for the lowest price, our data suggests flying with Frontier, where a return flight costs $121 on average.
What is the cheapest United Airlines flight from Chicago to Denver?
In the last 3 days, the lowest price for a flight with United Airlines from Chicago to Denver was $63 for a return flight and $44 for a one-way flight.
Does United Airlines fly direct to Denver from Chicago?
Yes, United Airlines does offer direct flights for the route, with around 60 flights per week.
What’s the cheapest day of the week to fly from Chicago to Denver with United Airlines?
On average, the cheapest day of the week to fly from Chicago to Denver with United Airlines is Wednesday, when prices are around $73. The most expensive day is generally Saturday, where the average price is around $107.
What’s the cheapest month to fly from Chicago to Denver with United Airlines?
The cheapest month for United Airlines flights to Denver from Chicago is generally September, where plane tickets cost $154 on average. If possible, try to avoid the most expensive months of June and January, where tickets cost $221 and $240 respectively.

See more FAQs

7.4

GoodBased on 8,759 verified guest reviews

7.7Boarding

7.3Comfort

6.7Food

8.1Crew

7.1Entertainment

Pros +

Cons -

Show reviews that mention

4.0 Mediocre

Mick, Feb 2025

GUM-HNL

Well, this is my second flight from THE first one that I took and this one was from Manila to Guam. The flight was comfortable. I did end up in first class. However, I had to fight for it a little bit, but when I went to Guam, I had to stay an extra night there, which was accommodated by united Which I'm pleased for that. The only thing that I have to say is when a situation happens with a cancelation. And you got first class guests very important that you accommodate and make sure that they have their flights before everybody else does, because we pay big money for the service and it is not cheap also. Take note There are things that we have planned as well. So this kind of damaged the tail end of my vacation, which I lost out in $2500 worth of car rentals hotel fair in Honolulu, Hawaii. I'm really hoping that I can be reimbursed at least that money from the insurance that I have on the trip through united. I will be submitting that in as well. When I'm back in the United States, because I'm currently in Guam. Staying good night. I'm waiting for my next flight out. For tomorrow morning..

2.0 Poor

Mick, Feb 2025

MNL-GUM

My experience with the united usually is a really good one. But however, on this particular trip going back to Hawaii from Manila, our flight had gotten canceled. However, the crew handled everything just right, but the Specialist team did not take care of their first class customers very well, Because I lost my first class seat and witch I'd paid for $3879.79 and ened up flying.... Economy on the way back and I have a medical condition to ware i cant sit in Economy seats for very long....And I have to fly first class for a reason, but they told me there was nothing they could do about it. But yet they have an itinerary to follow And It looks to me like they just let anybody grab those first class seats before they took care of the people that have already paid for them!! So when a flight is canceled, they should take care of their first class ticket payers... First because we pay big money for those seats And we count on those accommodations in those benefits... For real good reasons, that's why we pay that kind of money. I'm expecting at least half of A. Refund back to my credit card for you for this...And if I don't get it, I'll never fly united again, it's sad that this happens And some things are out of our control, and I totally understand it, but at least handle your first class holders first before all.. That is what we pay for.

4.0 Mediocre

Donald, Feb 2025

EGE-IAH

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

10.0 Wonderful

Wehtren Walter, Feb 2025

KUL-SIN

UA28 was good service and meals. UA is upgraded, I would like to book for next flight by UA Thanks Liao

2.0 Poor

Verified traveler, Feb 2025

EWR-MCO

The tv monitor in front of my seat was not responding. The flight crew reset it and it still didn’t work.

8.0 Very good

Shyamala, Feb 2025

SFO-DEN

Delay and cancellation was there , but otherwise fine

10.0 Wonderful

Ram, Feb 2025

HKG-SFO

Terrific flight great crew outstanding service

2.0 Poor

Shawn, Feb 2025

ATL-SFO

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

2.0 Poor

Dale, Feb 2025

IAD-YUL

Liked nothing. As per previous segment it was delay delay delay.

2.0 Poor

Dale, Feb 2025

HNL-IAD

Terrible. First of all we were delayed 4 3/4 hours departing Honolulu. As we had to leave our condo and the rental car had to be returned we had to go to the airport. Even though we had a business class boarding pass to Washington, since we did not have business class to Montreal we could not access the lounge without paying a $59 fee each. This does not make sense to us. Since we could not meet our original connection United booked us to Montreal via New York LaGuardia on Air Canada. In Washington a further delay got us into LaGuardia too late to make our connection to Montreal so we were booked on another Air Canada flight 3 hours later. We were originally scheduled to arrive in Montreal at 10:40 and arrived at 19:55. A totally exhausting day, United did not offer a meal voucher or any type of compensation. Air Canada did give us a digital meal voucher. The food in United business class is poor among all meals offered. The pods look nice but are not that confortable. Overall would not fly on United again.