
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $250 (Frontier) |
One-way from | $59 (Southwest) |
Popular in | April |
Cheapest in | December |
Average price | $345 |
Good round-trip deal | $237 or less |
Good one-way deal | $177 or less |
Fly from
Fly to
Route
Depart
Return
ChicagoSt. Louis
MDW - STL
MDWSTL
Chicago Midway
Fri 6/12
7:16 pm-11:23 pm
1 stop4h 07m
Lambert-St Louis
Tue 6/16
9:21 am-4:16 pm
1 stop6h 55m
ChicagoSt. Louis
MDW - STL
MDWSTL
Chicago Midway
Mon 6/1
12:53 pm-5:56 pm
1 stop5h 03m
Lambert-St Louis
Tue 6/30
11:18 am-6:18 pm
1 stop7h 00m
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Mon 6/1
9:25 am-1:10 pm
1 stop3h 45m
Lambert-St Louis
Tue 6/30
8:00 am-12:36 pm
1 stop4h 36m
ChicagoSt. Louis
MDW - STL
MDWSTL
Chicago Midway
Sat 8/8
6:45 am-12:45 pm
1 stop6h 00m
Lambert-St Louis
Thu 8/13
8:50 pm-9:55 pm
Nonstop1h 05m
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Fri 8/14
9:52 am-4:17 pm
1 stop6h 25m
Lambert-St Louis
Sat 8/15
1:04 pm-6:55 pm
1 stop5h 51m
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Thu 6/4
7:05 am-8:32 am
Nonstop1h 27m
Lambert-St Louis
Sun 6/7
5:14 am-11:00 am
1 stop5h 46m
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Thu 6/4
6:24 am-10:32 am
1 stop4h 08m
Lambert-St Louis
Sun 6/7
6:30 am-1:04 pm
1 stop6h 34m
ChicagoSt. Louis
MDW - STL
MDWSTL
Chicago Midway
Sat 5/23
1:22 pm-5:16 pm
1 stop3h 54m
Lambert-St Louis
Tue 8/11
2:10 pm-6:33 pm
1 stop4h 23m
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Mon 6/1
7:07 am-12:20 pm
1 stop5h 13m
Lambert-St Louis
Fri 6/5
6:00 am-1:47 pm
1 stop7h 47m
ChicagoSt. Louis
MDW - STL
MDWSTL
Chicago Midway
Thu 6/4
5:15 pm-11:59 pm
1 stop6h 44m
Lambert-St Louis
Sun 6/7
6:21 am-12:46 pm
2 stops6h 25m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
The price you pay for your flight from Chicago to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 82 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, September is the cheapest month in which you can book a flight from Chicago to St. Louis (average of $68). Flying from Chicago to St. Louis in January is currently the most expensive (average of $143). 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.
Unlike in the evening, when flights are generally more expensive, you can save up to 33% on flights from Chicago to St. Louis by exploring options for tickets at noon.
Travelers seeking maximum savings on their Chicago to St. Louis flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from CHI to STL are scheduled on a Friday (86 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (65 on average).
About 19% of weekly flights between Chicago and St. Louis have experienced delays in the past year, with the average delay time being 119 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.
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Southwest have had the lowest number of delays on this route, with just 12% of flights being delayed.
Overall
Boarding
Comfort
Crew
Entertainment
Food
Reviews
Dominic,Mar 2026
MCO - SMF
Overall
Boarding
Comfort
Crew
Entertainment
Food
Reviews
Dominic,Mar 2026
MCO - SMF
Overall
Boarding
Comfort
Crew
Entertainment
Food
Reviews
Dominic,Mar 2026
MCO - SMF
Overall
Boarding
Comfort
Crew
Entertainment
Food
Reviews
Dominic,Mar 2026
MCO - SMF
Overall
Boarding
Comfort
Crew
Entertainment
Food
Reviews
Dominic,Mar 2026
MCO - SMF
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$77 | Average$423 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$124 | Average$342 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$155 | Average$487 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$165 | Average$238 | FlexibilityNo cancel fee | On-timeN/A |