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 2/23. 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
$152
Overall average: $314
Multiple Airlines
Tue 2/3Mon 2/9
ORD - STL • 1 stop
Cheapest non-stop
$179
Typical prices: $232-$379
United Airlines
Tue 2/3Tue 2/10
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

Tue, Feb 3 - Mon, Feb 9
Multiple Airlines Logo
12:44 pm - 11:33 pm
ORD
-
STL
10h 49m1 stop
Multiple Airlines Logo
5:42 pm - 3:52 pm
STL
-
ORD
22h 10m1 stop
$152Multiple Airlines
Thu, Jan 29 - Fri, Jan 30
Frontier Logo
11:51 am - 11:33 pm
ORD
-
STL
11h 42m1 stop
Frontier Logo
5:42 pm - 4:40 pm
STL
-
ORD
22h 58m1 stop
$169Frontier
Sat, Feb 7 - Mon, Feb 9
Multiple Airlines Logo
12:44 pm - 11:33 pm
ORD
-
STL
10h 49m1 stop
Multiple Airlines Logo
5:42 pm - 3:52 pm
STL
-
ORD
22h 10m1 stop
$175Multiple Airlines
Mon, Feb 2 - Mon, Feb 9
Multiple Airlines Logo
4:38 pm - 11:33 pm
ORD
-
STL
30h 55m2 stops
Multiple Airlines Logo
5:42 pm - 3:52 pm
STL
-
ORD
22h 10m1 stop
$176Multiple Airlines
Tue, Feb 3 - Tue, Feb 10
United Airlines Logo
1:00 pm - 2:30 pm
ORD
-
STL
1h 30mnonstop
United Airlines Logo
9:57 am - 11:32 am
STL
-
ORD
1h 35mnonstop
$179United Airlines
Mon, Feb 2 - Mon, Feb 9
American Airlines Logo
6:50 pm - 8:13 pm
ORD
-
STL
1h 23mnonstop
American Airlines Logo
1:35 pm - 2:57 pm
STL
-
ORD
1h 22mnonstop
$181American Airlines
Fri, Jan 30 - Sat, Jan 31
Frontier Logo
11:45 am - 11:33 pm
ORD
-
STL
11h 48m1 stop
Frontier Logo
3:46 pm - 10:57 am
STL
-
ORD
19h 11m1 stop
$190Frontier
Tue, Feb 3 - Tue, Feb 10
Delta Logo
9:53 am - 4:45 pm
MDW
-
STL
6h 52m1 stop
Delta Logo
6:35 am - 12:46 pm
STL
-
MDW
6h 11m1 stop
$199Delta
Mon, Feb 2 - Mon, Feb 9
Delta Logo
7:16 pm - 11:25 pm
MDW
-
STL
4h 09m1 stop
Delta Logo
11:23 am - 6:36 pm
STL
-
MDW
7h 13m1 stop
$201Delta
Tue, Jan 20 - Wed, Jan 28
American Airlines Logo
6:00 am - 2:50 pm
SPI
-
STL
8h 50m1 stop
American Airlines Logo
6:00 am - 10:14 pm
STL
-
SPI
16h 14m1 stop
$603American Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$67
Best time to beat the crowds but there is an average 5% 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)