Cheap flights from Chicago, IL to St. Louis, MO

Choose between Frontier Airlines, United Airlines, or Southern Airways Express to find the best price

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Travelers usually depart from O Hare International, Chicago Midway International, or Chicago Rockford International when they travel from Chicago to St. Louis. The distance between Chicago and St. Louis is 415 km. The most popular airlines for this route are Frontier Airlines, United Airlines, Southern Airways Express, Spirit Airlines, and Allegiant Air. Chicago and St. Louis have 125 direct flights per week.

Weekly direct flights

Discover the top airlines offering direct flights from Chicago to St. Louis in the next month. You’ll find the number of daily direct flights per airline in the table.

Weekly direct flights for Sun 07.04 - Sat 13.04

AirlineSun 07.04Mon 08.04Tue 09.04Wed 10.04Thu 11.04Fri 12.04Sat 13.04
6666666

Weekly direct flights for Sun 14.04 - Sat 20.04

AirlineSun 14.04Mon 15.04Tue 16.04Wed 17.04Thu 18.04Fri 19.04Sat 20.04
6666666

Weekly direct flights for Sun 21.04 - Sat 27.04

AirlineSun 21.04Mon 22.04Tue 23.04Wed 24.04Thu 25.04Fri 26.04Sat 27.04
6676666

Weekly direct flights for Sun 28.04 - Sat 04.05

AirlineSun 28.04Mon 29.04Tue 30.04Wed 01.05Thu 02.05Fri 03.05Sat 04.05
6667666

Check-in for a flight from Chicago to St. Louis

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo
Southern Airways ExpressFDY9XYesNo
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
Allegiant AirAAYG4NoOpens 24 days before flight
Closes 1 hours before flight

Weather in St. Louis

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January3°C-3°C
February6°C-2°C
March13°C3°C
April18°C8°C
May24°C14°C
June29°C19°C
July31°C21°C
August30°C20°C
September27°C16°C
October20°C10°C
November12°C3°C
December7°C0°C
Hottest Month
31°C
July
Coldest month
-3°C
January
Sunny days
261
days per year
Snow days
9
days per year

14 day forecast

Thursday
4 Apr
87%
8°C2°C
11 Apr
85%
16°C10°C
Friday
5 Apr
13°C2°C
12 Apr
19°C7°C
Saturday
6 Apr
14°C2°C
13 Apr
26°C11°C
Sunday
7 Apr
86%
19°C7°C
14 Apr
23°C14°C
Monday
8 Apr
81%
25°C10°C
15 Apr
89%
15°C9°C
Tuesday
9 Apr
22°C12°C
16 Apr
22°C7°C
Wednesday
10 Apr
84%
13°C11°C
17 Apr
26°C11°C

Frequently asked questions

How long does it take to travel from Chicago to St. Louis?
What is the flight distance between Chicago and St. Louis?
What airlines offer nonstop (direct) flights between Chicago and St. Louis?
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Which airports are there in Chicago?
What airports are near Chicago?
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Is it possible to combine flights, buses, and trains in one itinerary when traveling between Chicago and St. Louis?
What is Virtual Interlining and how do I use it?
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What time do nonstop (direct) flights between Chicago and St. Louis depart?
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