STL

$67 Find Cheap Flights from Illinois to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 2/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$136
Overall average: $320
Multiple Airlines
Sat 1/10Mon 1/12
ORD - STL • 1 stop
Cheapest non-stop
$153
Typical prices: $245-$889
American Airlines
Tue 1/20Wed 1/21
ORD - STL • Non-stop
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Flight Deals
Useful Info
Flight Deals

Cheap Flights from Illinois to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Illinois to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Illinois to St. Louis

Sat, Jan 10 - Mon, Jan 12
Multiple Airlines Logo
12:44 pm - 10:33 pm
ORD
-
STL
9h 49m1 stop
Multiple Airlines Logo
5:11 pm - 1:13 pm
STL
-
ORD
20h 02m1 stop
$136Multiple Airlines
Sat, Jan 10 - Mon, Jan 12
Multiple Airlines Logo
12:44 pm - 10:33 pm
ORD
-
STL
9h 49m1 stop
Multiple Airlines Logo
5:11 pm - 1:13 pm
STL
-
ORD
20h 02m1 stop
$141Multiple Airlines
Tue, Jan 20 - Wed, Jan 21
American Airlines Logo
1:25 pm - 2:50 pm
ORD
-
STL
1h 25mnonstop
American Airlines Logo
6:44 pm - 8:15 pm
STL
-
ORD
1h 31mnonstop
$153American Airlines
Sat, Jan 24 - Mon, Jan 26
Southwest Logo
7:40 pm - 8:55 pm
MDW
-
STL
1h 15mnonstop
Southwest Logo
6:05 am - 7:15 am
STL
-
MDW
1h 10mnonstop
$157Southwest
Tue, Feb 10 - Thu, Feb 12
Southwest Logo
1:50 pm - 3:00 pm
MDW
-
STL
1h 10mnonstop
Southwest Logo
3:10 pm - 4:15 pm
STL
-
MDW
1h 05mnonstop
$162Southwest
Mon, Jan 12 - Tue, Jan 13
United Airlines Logo
9:25 pm - 10:58 pm
ORD
-
STL
1h 33mnonstop
United Airlines Logo
3:11 pm - 4:55 pm
STL
-
ORD
1h 44mnonstop
$162United Airlines
Sat, Jan 17 - Sat, Jan 24
United Airlines Logo
10:52 am - 12:29 pm
ORD
-
STL
1h 37mnonstop
United Airlines Logo
11:20 am - 12:55 pm
STL
-
ORD
1h 35mnonstop
$171United Airlines
Sat, Jan 10 - Mon, Jan 12
American Airlines Logo
8:50 am - 10:20 am
ORD
-
STL
1h 30mnonstop
American Airlines Logo
6:44 pm - 8:15 pm
STL
-
ORD
1h 31mnonstop
$172American Airlines
Tue, Jan 20 - Wed, Jan 21
Delta Logo
7:16 pm - 11:25 pm
MDW
-
STL
4h 09m1 stop
Delta Logo
5:04 pm - 10:22 pm
STL
-
MDW
5h 18m1 stop
$173Delta
Wed, Feb 4 - Wed, Feb 11
Delta Logo
9:32 am - 4:45 pm
MDW
-
STL
7h 13m2 stops
Delta Logo
5:04 pm - 10:22 pm
STL
-
MDW
5h 18m1 stop
$178Delta
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$67
Best time to beat the crowds with an average 9% drop in price.
Flight from Chicago Midway Airport to St. Louis

FAQs for booking flights from Illinois to St. Louis

  • How does KAYAK find such low prices on flights from Illinois to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Illinois with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis

St. Louis (STL)