
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $195 (Kiwi.com) |
One-way from | $49 (United Airlines) |
Popular in | January |
Cheapest in | September |
Average price | $355 |
Good round-trip deal | $470 or less |
Good one-way deal | $229 or less |
Fly from
Fly to
Route
Depart
Return
Price
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 5/2
6:20 am-12:49 pm
2 stops6h 29m
Chicago O'Hare Intl
Mon 5/4
7:09 pm-11:13 pm
1 stop4h 04m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sun 5/3
9:55 pm-6:47 am
1 stop8h 52m
Chicago O'Hare Intl
Mon 5/4
10:55 am-7:12 pm
1 stop8h 17m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Fri 3/6
1:09 pm-10:39 pm
1 stop9h 30m
Chicago O'Hare Intl
Tue 3/10
4:18 pm-11:19 pm
1 stop7h 01m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 4/4
8:00 am-9:31 am
Nonstop1h 31m
Chicago O'Hare Intl
Sat 4/4
1:39 pm-7:30 pm
1 stop5h 51m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Mon 4/13
1:46 pm-6:52 pm
1 stop5h 06m
Chicago O'Hare Intl
Thu 4/16
7:09 pm-11:14 pm
1 stop4h 05m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Fri 3/27
7:00 pm-8:35 pm
Nonstop1h 35m
Chicago O'Hare Intl
Sun 3/29
7:05 am-8:35 am
Nonstop1h 30m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 5/16
6:20 am-12:56 pm
2 stops6h 36m
Chicago O'Hare Intl
Sun 5/17
6:30 am-10:27 am
1 stop3h 57m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 5/16
6:20 am-12:56 pm
2 stops6h 36m
Chicago O'Hare Intl
Sat 5/16
5:43 pm-11:21 pm
1 stop5h 38m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Thu 4/9
4:54 pm-11:36 pm
1 stop6h 42m
Chicago O'Hare Intl
Thu 4/23
9:18 pm-9:00 pm
1 stop23h 42m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Wed 5/20
7:35 am-12:50 pm
1 stop5h 15m
Chicago O'Hare Intl
Wed 5/27
10:30 am-6:05 pm
1 stop7h 35m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | 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 75 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 $93). Flying from St. Louis to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $169). 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 46% 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.
Entertainment
Comfort
Boarding
Crew
Overall
Food
Reviews
Anonymous,Oct 2025
YUL - ORD
Entertainment
Comfort
Boarding
Crew
Overall
Food
Reviews
Anonymous,Oct 2025
YUL - ORD
Entertainment
Comfort
Boarding
Crew
Overall
Food
Reviews
Anonymous,Oct 2025
YUL - ORD
Entertainment
Comfort
Boarding
Crew
Overall
Food
Reviews
Anonymous,Oct 2025
YUL - ORD
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$291 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$114 | Average$328 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$140 | Average$212 | FlexibilityNo cancel fee | On-timeN/A |