
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $179 (Delta) |
One-way from | $49 (United Airlines) |
Popular in | January |
Cheapest in | September |
Average price | $317 |
Good round-trip deal | $466 or less |
Good one-way deal | $220 or less |
Fly from
Fly to
Route
Depart
Return
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Wed 5/20
6:21 am-1:01 pm
2 stops6h 40m
Chicago O'Hare Intl
Wed 5/27
2:00 pm-11:21 pm
2 stops9h 21m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 4/18
9:16 am-10:45 am
Nonstop1h 29m
Chicago O'Hare Intl
Tue 4/21
7:00 am-8:25 am
Nonstop1h 25m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Mon 3/30
5:45 am-11:10 am
1 stop5h 25m
Chicago O'Hare Intl
Wed 4/8
11:55 am-5:55 pm
1 stop6h 00m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 6/6
6:45 am-10:27 am
1 stop3h 42m
Chicago O'Hare Intl
Sat 6/6
3:00 pm-9:29 pm
1 stop6h 29m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Wed 5/20
6:21 am-1:01 pm
2 stops6h 40m
Chicago O'Hare Intl
Sat 5/23
1:44 pm-11:21 pm
2 stops9h 37m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 5/23
10:15 am-4:29 pm
1 stop6h 14m
Chicago O'Hare Intl
Sun 5/31
6:24 am-10:32 am
1 stop4h 08m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Thu 5/21
6:45 am-10:27 am
1 stop3h 42m
Chicago O'Hare Intl
Mon 5/25
7:00 am-1:10 pm
1 stop6h 10m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sat 3/28
8:25 am-3:00 pm
1 stop6h 35m
Chicago O'Hare Intl
Mon 3/30
2:40 pm-9:00 pm
1 stop6h 20m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Thu 6/11
6:00 am-7:30 am
Nonstop1h 30m
Chicago O'Hare Intl
Thu 6/11
7:45 pm-9:16 pm
Nonstop1h 31m
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Sun 4/5
7:45 am-9:11 am
Nonstop1h 26m
Chicago O'Hare Intl
Sun 4/12
9:45 pm-11:11 pm
Nonstop1h 26m
| 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 February is currently the most expensive (average of $187). 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.
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Anonymous,Oct 2025
YUL - ORD
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Anonymous,Oct 2025
YUL - ORD
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$297 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$114 | Average$336 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$140 | Average$203 | FlexibilityNo cancel fee | On-timeN/A |