Frontier's UpFront Plus guarantees an empty middle seat, enhancing comfort for a fee.
Frontier's Economy Bundle includes a carry-on, seat selection, and no change fees.

Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $106 (Frontier) |
One-way from | $69 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $195 |
Good round-trip deal | $205 or less |
Good one-way deal | $171 or less |
Fly from
Fly to
Route
Depart
Return
Price
ChicagoDenver
ORD - DEN
ORDDEN
Chicago O'Hare Intl
Wed 2/25
9:15 pm-11:06 pm
Nonstop2h 51m
Denver Intl
Tue 3/10
5:54 pm-9:29 pm
Nonstop2h 35m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Thu 1/29
8:10 am-10:00 am
Nonstop2h 50m
Denver Intl
Mon 2/2
9:45 am-1:10 pm
Nonstop2h 25m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Wed 3/18
5:55 am-7:40 am
Nonstop2h 45m
Denver Intl
Mon 3/23
7:30 pm-10:50 pm
Nonstop2h 20m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Wed 2/25
2:10 pm-3:50 pm
Nonstop2h 40m
Denver Intl
Tue 3/10
11:45 am-4:40 pm
1 stop3h 55m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Thu 3/19
9:40 pm-11:20 pm
Nonstop2h 40m
Denver Intl
Wed 3/25
11:10 am-4:10 pm
1 stop4h 00m
ChicagoDenver
ORD - DEN
ORDDEN
Chicago O'Hare Intl
Wed 3/11
4:50 pm-6:35 pm
Nonstop2h 45m
Denver Intl
Tue 3/17
6:00 am-3:00 pm
1 stop8h 00m
ChicagoDenver
ORD - DEN
ORDDEN
Chicago O'Hare Intl
Tue 3/10
4:50 pm-6:35 pm
Nonstop2h 45m
Denver Intl
Tue 3/17
6:50 am-1:15 pm
1 stop5h 25m
ChicagoDenver
ORD - DEN
ORDDEN
Chicago O'Hare Intl
Wed 2/25
1:00 pm-8:00 pm
1 stop8h 00m
Denver Intl
Tue 3/10
10:10 am-1:55 pm
Nonstop2h 45m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Thu 3/19
10:00 am-2:20 pm
1 stop5h 20m
Denver Intl
Thu 3/26
6:20 am-9:45 am
Nonstop2h 25m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Tue 2/24
2:10 pm-3:50 pm
Nonstop2h 40m
Denver Intl
Sat 2/28
7:20 am-10:55 am
Nonstop2h 35m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
The price you pay for your flight from Chicago to Denver may vary depending on when you book. For the best chance of a lower fare, look to book 35 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, March is the cheapest month in which you can book a flight from Chicago to Denver (average of $52). Flying from Chicago to Denver in July is currently the most expensive (average of $113). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
A simple way to save on the total cost of your ticket is to fly from Chicago to Denver in the morning. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight in the afternoon.
Travelers seeking maximum savings on their Chicago to Denver flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from CHI to DEN are scheduled on a Wednesday (51 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (24 on average).
About 17% of weekly flights between Chicago and Denver have experienced delays in the past year, with the average delay time being 144 minutes.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
Wednesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Frontier have had the lowest number of delays on this route, with just 14% of flights being delayed.
Crew
Overall
Food
Boarding
Entertainment
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Overall
Food
Boarding
Entertainment
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Overall
Food
Boarding
Entertainment
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Overall
Food
Boarding
Entertainment
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
Crew
Overall
Food
Boarding
Entertainment
Comfort
Reviews
Thomas,Dec 2025
SEA - DEN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$58 | Average$161 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$145 | Average$189 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$153 | Average$229 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$155 | Average$279 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$157 | Average$260 | FlexibilityNo cancel fee | On-time63% |