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 12/25. 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

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 24% 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.

Everything you should know

Cheapest round-trip
$117
Overall average: $244
American Airlines
Tue 3/31Tue 4/7
ORD - STL • Non-stop
Cheapest non-stop
$134
Typical prices: $298-$673
Southwest
Thu 1/1Mon 1/5
MDW - 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!
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

Tue, Mar 31 - Tue, Apr 7
American Airlines Logo
8:25 pm - 9:48 pmORD-STL
1h 23mnonstop
American Airlines Logo
7:50 am - 9:10 amSTL-ORD
1h 20mnonstop
$117American Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
Frontier Logo
5:05 am - 11:07 amORD-STL
6h 02m1 stop
Frontier Logo
10:47 am - 10:24 pmSTL-ORD
11h 37m1 stop
$120Frontier
Find Deal
Thu, Jan 8 - Sun, Jan 11
Frontier Logo
9:07 pm - 10:02 amMDW-STL
12h 55m1 stop
Frontier Logo
5:11 pm - 9:13 amSTL-MDW
16h 02m1 stop
$129Frontier
Find Deal
Thu, Jan 1 - Mon, Jan 5
Southwest Logo
8:25 am - 9:40 amMDW-STL
1h 15mnonstop
Southwest Logo
5:45 pm - 6:55 pmSTL-MDW
1h 10mnonstop
$134Southwest
Find Deal
Thu, Jan 1 - Mon, Jan 5
American Airlines Logo
7:07 am - 8:35 amORD-STL
1h 28mnonstop
American Airlines Logo
6:41 am - 8:11 amSTL-ORD
1h 30mnonstop
$134American Airlines
Find Deal
Thu, Jan 1 - Mon, Jan 5
American Airlines Logo
7:07 am - 8:35 amORD-STL
1h 28mnonstop
American Airlines Logo
8:01 pm - 9:30 pmSTL-ORD
1h 29mnonstop
$135American Airlines
Find Deal
Thu, Jan 1 - Mon, Jan 5
American Airlines Logo
7:07 am - 8:35 amORD-STL
1h 28mnonstop
American Airlines Logo
6:41 am - 8:11 amSTL-ORD
1h 30mnonstop
$136American Airlines
Find Deal
Tue, Mar 31 - Tue, Apr 7
Southwest Logo
2:40 pm - 7:55 pmORD-STL
5h 15m1 stop
Southwest Logo
8:35 am - 3:00 pmSTL-ORD
6h 25m1 stop
$137Southwest
Find Deal
Tue, Dec 16 - Wed, Dec 31
Delta Logo
6:00 am - 10:45 amMDW-STL
4h 45m1 stop
Delta Logo
5:13 pm - 10:22 pmSTL-MDW
5h 09m1 stop
$157Delta
Find Deal
Wed, Dec 31 - Tue, Jan 13
Delta Logo
1:35 pm - 8:41 pmORD-STL
7h 06m1 stop
Delta Logo
12:00 pm - 4:43 pmSTL-ORD
4h 43m1 stop
$157Delta
Find Deal
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$49
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 2% 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.

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)