
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $101 (Cheapflightsfares) |
One-way from | $27 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $228 |
Good round-trip deal | $224 or less |
Good one-way deal | $133 or less |
Fly from
Fly to
Route
Depart
Return
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Wed 6/24
4:17 pm-11:04 pm
1 stop7h 47m
Denver Intl
Mon 6/29
4:12 pm-7:23 pm
Nonstop2h 11m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Wed 6/3
8:50 pm-10:35 pm
Nonstop2h 45m
Denver Intl
Wed 6/10
8:05 am-1:50 pm
1 stop4h 45m
ChicagoDenver
ORD - DEN
ORDDEN
Chicago O'Hare Intl
Wed 5/27
3:45 pm-8:55 pm
1 stop6h 10m
Denver Intl
Wed 6/3
11:25 am-3:00 pm
Nonstop2h 35m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Wed 5/20
9:22 am-1:59 pm
1 stop5h 37m
Denver Intl
Thu 5/21
6:00 am-1:19 pm
1 stop6h 19m
ChicagoDenver
ORD - DEN
ORDDEN
Chicago O'Hare Intl
Wed 6/24
5:00 am-6:41 am
Nonstop2h 41m
Denver Intl
Sun 6/28
9:05 pm-12:44 am
Nonstop2h 39m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Thu 6/11
5:15 am-6:50 am
Nonstop2h 35m
Denver Intl
Tue 6/23
6:15 am-9:40 am
Nonstop2h 25m
ChicagoDenver
ORD - DEN
ORDDEN
Chicago O'Hare Intl
Mon 6/15
5:30 am-12:59 pm
1 stop8h 29m
Denver Intl
Wed 6/17
10:25 am-4:26 pm
1 stop5h 01m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Wed 7/22
9:05 pm-10:50 pm
Nonstop2h 45m
Denver Intl
Sun 7/26
5:50 am-9:15 am
Nonstop2h 25m
ChicagoDenver
MDW - DEN
MDWDEN
Chicago Midway
Mon 6/1
6:00 am-7:40 am
Nonstop2h 40m
Denver Intl
Sat 6/13
12:05 pm-5:00 pm
1 stop3h 55m
St. LouisDenver
STL - DEN
STLDEN
Lambert-St Louis
Tue 5/26
6:40 pm-10:40 pm
1 stop5h 00m
Denver Intl
Wed 5/27
8:40 am-2:30 pm
1 stop4h 50m
To ensure you get the cheapest price possible for a flight from Illinois to Denver, you should look to book at least 84 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, October is the cheapest month in which you can book a flight from Illinois to Denver (average of $168). Flying from Illinois to Denver in March is currently the most expensive (average of $349). 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 Illinois to Denver in the evening. If you’re flexible enough to do this you can expect to save up to 28% on your trip compared to booking a flight in the morning.
Travelers seeking maximum savings on their Illinois to Denver flight should consider departing on Saturday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from USIL to DEN are scheduled on a Thursday (64 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (37 on average).
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$53 | Average$168 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$68 | Average$167 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$145 | Average$223 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$151 | Average$269 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$152 | Average$374 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$160 | Average$365 | FlexibilityNo cancel fee | On-time69% |