STL

$49 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 8/5. 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

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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

Tue, Aug 19 - Wed, Aug 20
Southwest Logo
8:25 pm - 9:40 pmMDW-STL
1h 15mnonstop
Southwest Logo
11:35 am - 12:40 pmSTL-MDW
1h 05mnonstop
$97Southwest
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Tue, Aug 19 - Wed, Aug 20
American Airlines Logo
7:00 pm - 8:25 pmORD-STL
1h 25mnonstop
American Airlines Logo
6:06 am - 7:30 amSTL-ORD
1h 24mnonstop
$97American Airlines
Find Deal
Fri, Jul 25 - Fri, Aug 1
Southern / Mokulele Logo
1:10 pm - 4:45 pmORD-STL
3h 35m1 stop
Southern / Mokulele Logo
1:00 pm - 4:32 pmSTL-ORD
3h 32m1 stop
$166Southern / Mokulele
Find Deal
Fri, Jul 11 - Fri, Jul 18
Southern / Mokulele Logo
8:15 am - 12:10 pmORD-STL
3h 55m1 stop
Southern / Mokulele Logo
1:00 pm - 4:32 pmSTL-ORD
3h 32m1 stop
$172Southern / Mokulele
Find Deal
Sat, Sep 20 - Sat, Oct 4
Delta Logo
9:30 am - 1:20 pmMDW-STL
3h 50m1 stop
Delta Logo
3:30 pm - 9:44 pmSTL-MDW
6h 14m1 stop
$177Delta
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Thu, Sep 25 - Tue, Sep 30
Delta Logo
6:00 am - 12:25 pmORD-STL
6h 25m1 stop
Delta Logo
1:30 pm - 6:56 pmSTL-ORD
5h 26m1 stop
$177Delta
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Sat, Jul 19 - Sat, Jul 26
Frontier Logo
6:20 am - 1:59 pmMDW-STL
7h 39m1 stop
Frontier Logo
2:52 pm - 10:35 pmSTL-MDW
7h 43m1 stop
$199Frontier
Find Deal
Sat, Jul 19 - Sat, Jul 26
Frontier Logo
6:20 am - 1:59 pmMDW-STL
7h 39m1 stop
Frontier Logo
2:52 pm - 10:35 pmSTL-MDW
7h 43m1 stop
$200Frontier
Find Deal
Sun, Aug 31 - Mon, Sep 1
United Airlines Logo
2:20 pm - 3:44 pmORD-STL
1h 24mnonstop
United Airlines Logo
9:17 am - 10:47 amSTL-ORD
1h 30mnonstop
$221United Airlines
Find Deal
Wed, Jul 2 - Sat, Jul 12
United Airlines Logo
9:20 pm - 10:45 pmORD-STL
1h 25mnonstop
United Airlines Logo
7:55 am - 9:20 amSTL-ORD
1h 25mnonstop
$233United Airlines
Find Deal
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Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$49
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 8% lower on average.
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.

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)

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