STL

$56 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 11/27. 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

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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

Wed, Dec 24 - Sat, Jan 10
Southwest Logo
11:25 am - 12:35 pmMDW-STL
1h 10mnonstop
Southwest Logo
8:45 am - 4:55 pmSTL-MDW
8h 10m2 stops
$126Southwest
Find Deal
Sat, Feb 21 - Mon, Feb 23
United Airlines Logo
10:54 am - 12:25 pmORD-STL
1h 31mnonstop
United Airlines Logo
11:25 am - 12:58 pmSTL-ORD
1h 33mnonstop
$131United Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
Frontier Logo
9:53 pm - 11:22 amORD-STL
13h 29m1 stop
Frontier Logo
12:07 pm - 8:17 pmSTL-ORD
8h 10m1 stop
$144Frontier
Find Deal
Thu, Dec 4 - Mon, Dec 8
Frontier Logo
5:05 am - 11:07 amORD-STL
6h 02m1 stop
Frontier Logo
12:07 pm - 8:17 pmSTL-ORD
8h 10m1 stop
$145Frontier
Find Deal
Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
6:41 am - 8:08 amORD-STL
1h 27mnonstop
American Airlines Logo
1:59 pm - 3:29 pmSTL-ORD
1h 30mnonstop
$172American Airlines
Find Deal
Sat, Feb 21 - Mon, Feb 23
Delta Logo
10:35 am - 4:55 pmORD-STL
6h 20m1 stop
Delta Logo
7:05 pm - 11:54 pmSTL-ORD
4h 49m1 stop
$174Delta
Find Deal
Sat, Feb 21 - Mon, Feb 23
Delta Logo
7:00 am - 4:50 pmORD-STL
9h 50m2 stops
Delta Logo
10:00 am - 4:39 pmSTL-ORD
6h 39m1 stop
$179Delta
Find Deal
Fri, Jan 9 - Sun, Jan 11
Multiple Airlines Logo
9:07 pm - 10:02 amMDW-STL
12h 55m1 stop
Multiple Airlines Logo
12:20 pm - 11:25 pmSTL-MDW
11h 05m2 stops
$189Multiple Airlines
Find Deal
Fri, Oct 31 - Sun, Nov 2
Multiple Airlines Logo
6:00 am - 9:07 amORD-STL
27h 07m1 stop
Multiple Airlines Logo
6:21 pm - 11:12 amSTL-ORD
16h 51m1 stop
$197Multiple Airlines
Find Deal
Mon, Nov 17 - Mon, Nov 24
American Airlines Logo
5:40 pm - 11:07 pmORD-STL
5h 27m1 stop
American Airlines Logo
2:17 pm - 3:46 pmSTL-ORD
1h 29mnonstop
$199American Airlines
Find Deal

Everything you should know

Cheapest round-trip
$126
Southwest
Wed 12/24Sat 1/10
MDW - STL • Non-stop
Cheapest non-stop
$131
Typical prices: $253-$361
United Airlines
Sat 2/21Mon 2/23
ORD - STL • Non-stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$56
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 1% increase 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)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.