
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $191 (American Airlines) |
One-way from | $59 (United Airlines) |
Popular in | January |
Cheapest in | September |
Average price | $316 |
Good round-trip deal | $514 or less |
Good one-way deal | $259 or less |
Fly from
Fly to
Route
Depart
Return
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Wed 6/10
8:49 am-6:29 pm
2 stops9h 40m
Chicago O'Hare Intl
Sat 6/13
6:30 am-10:28 am
1 stop3h 58m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Fri 6/12
1:59 pm-6:29 pm
1 stop4h 30m
Chicago O'Hare Intl
Tue 6/16
7:01 am-1:09 pm
1 stop6h 08m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 6/6
6:21 am-12:56 pm
2 stops6h 35m
Chicago O'Hare Intl
Sat 6/13
2:35 pm-8:39 pm
1 stop6h 04m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Mon 6/8
7:03 am-8:30 am
Nonstop1h 27m
Chicago O'Hare Intl
Thu 6/11
7:05 am-8:31 am
Nonstop1h 26m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Fri 6/12
1:13 pm-2:43 pm
Nonstop1h 30m
Chicago O'Hare Intl
Sun 6/14
10:00 pm-11:29 pm
Nonstop1h 29m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Fri 5/29
11:25 am-8:14 pm
2 stops8h 49m
Chicago O'Hare Intl
Sun 5/31
7:07 am-12:20 pm
1 stop5h 13m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Thu 5/28
8:25 am-3:30 pm
1 stop7h 05m
Chicago O'Hare Intl
Sun 5/31
4:15 pm-9:20 pm
1 stop5h 05m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sun 6/7
7:22 am-9:00 am
Nonstop1h 38m
Chicago O'Hare Intl
Sat 6/13
9:05 am-10:39 am
Nonstop1h 34m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Tue 6/23
6:00 am-7:30 am
Nonstop1h 30m
Chicago O'Hare Intl
Thu 6/25
2:20 pm-3:46 pm
Nonstop1h 26m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Tue 5/26
5:29 pm-7:00 pm
Nonstop1h 31m
Chicago O'Hare Intl
Sat 5/30
5:55 pm-7:23 pm
Nonstop1h 28m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
To ensure you get the cheapest price possible for a flight from St. Louis to Chicago O'Hare Intl Airport, you should look to book at least 74 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, September is the cheapest month in which you can book a flight from St. Louis to Chicago O'Hare Intl Airport (average of $211). Flying from St. Louis to Chicago O'Hare Intl Airport in January is currently the most expensive (average of $399). 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.
It’s typically best to fly out from St. Louis to Chicago O'Hare Intl Airport in the morning. Doing so could potentially save you 45% on the flight price compared to flying at noon, which is usually more expensive.
Travelers seeking maximum savings on their St. Louis to Chicago O'Hare Intl Airport flight should consider departing on Friday mornings when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Crew
Comfort
Boarding
Overall
Food
Entertainment
Reviews
Anonymous,Oct 2025
YUL - ORD
Crew
Comfort
Boarding
Overall
Food
Entertainment
Reviews
Anonymous,Oct 2025
YUL - ORD
Crew
Comfort
Boarding
Overall
Food
Entertainment
Reviews
Anonymous,Oct 2025
YUL - ORD
Crew
Comfort
Boarding
Overall
Food
Entertainment
Reviews
Anonymous,Oct 2025
YUL - ORD
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$308 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$125 | Average$352 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$140 | Average$227 | FlexibilityNo cancel fee | On-timeN/A |