Find a great deal and save up to 98% by booking at least 48 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Illinois within the next two weeks, with the cheapest ticket starting at $270.
February can be a great time to fly to Illinois from St. Louis with a flight ticket averaging about $271. Cheapflights users have found deals in the month of February for as cheap as $167. The most expensive prices can be found in the month of May.
When flying from St. Louis to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Fly from
Fly to
Budget
$88 - $233
Route
Depart
Return
Price
Lambert-St LouisQuincy Regional
STL - UIN
STLUIN
Lambert-St Louis
Mon 4/29
Nonstop0h 50m
Quincy Regional
Tue 4/30
Nonstop0h 50m
Lambert-St LouisQuincy Regional
STL - UIN
STLUIN
Lambert-St Louis
Tue 7/30
Nonstop0h 50m
Quincy Regional
Thu 8/1
Nonstop0h 50m
Lambert-St LouisChicago O'Hare Intl
STL - ORD
STLORD
Lambert-St Louis
Sat 4/27
Nonstop1h 19m
Chicago O'Hare Intl
Sat 4/27
Nonstop1h 23m
Lambert-St LouisChicago O'Hare Intl
STL - ORD
STLORD
Lambert-St Louis
Sat 4/27
Nonstop1h 15m
Chicago O'Hare Intl
Sat 5/4
Nonstop1h 23m
Lambert-St LouisChicago Midway
STL - MDW
STLMDW
Lambert-St Louis
Sat 4/27
1 stop4h 34m
Chicago Midway
Sat 5/4
1 stop4h 29m
Lambert-St LouisChicago O'Hare Intl
STL - ORD
STLORD
Lambert-St Louis
Sat 4/20
2 stops9h 26m
Chicago O'Hare Intl
Sun 4/28
1 stop3h 05m
Lambert-St LouisChicago O'Hare Intl
STL - ORD
STLORD
Lambert-St Louis
Sat 4/27
2 stops9h 26m
Chicago O'Hare Intl
Sat 5/4
2 stops20h 40m
Lambert-St LouisChicago O'Hare Intl
STL - ORD
STLORD
Lambert-St Louis
Sun 5/26
Nonstop1h 24m
Chicago O'Hare Intl
Wed 5/29
Nonstop1h 24m
Lambert-St LouisChicago Midway
STL - MDW
STLMDW
Lambert-St Louis
Thu 4/18
1 stop7h 57m
Chicago Midway
Sun 4/21
1 stop11h 20m
No data available for this route at this time. Please check back soon.
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
No tray tables for food or drink not convenient nor comfortable
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
No tray tables for food or drink not convenient nor comfortable
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
No tray tables for food or drink not convenient nor comfortable
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
No tray tables for food or drink not convenient nor comfortable
Boarding
Entertainment
Food
Overall
Comfort
Crew
Reviews
No tray tables for food or drink not convenient nor comfortable
11%of flight departures | Early morningMidnight to 6 am |
---|---|
33%of flight departures | Morning6 am to noon |
55%of flight departures | AfternoonNoon to 6 pm |
1%of flight departures | Evening6 pm to midnight |
Cheapflights helps you search for flights from St. Louis to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
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Yes, you can often find last-minute deals on St. Louis to Illinois flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.
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Cancellation policies vary by airline and fare type. After entering your flight details, you can view the cancellation policies for each deal in the search results. Some deals may offer flexibility in terms of cancellation and changes.