STL

$55 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 7/8. 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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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, Jul 7 - Tue, Jul 14
Frontier Logo
6:05 am - 5:37 pm
MDW
-
STL
11h 32m
1 stop
Frontier Logo
6:34 pm - 11:07 am
STL
-
MDW
16h 33m
1 stop
$253Frontier
Mon, Jul 6 - Tue, Jul 7
Southwest Logo
6:40 pm - 10:50 pm
MDW
-
STL
4h 10m
1 stop
Southwest Logo
6:15 pm - 11:15 pm
STL
-
MDW
5h 00m
1 stop
$254Southwest
Thu, Aug 6 - Sat, Aug 8
Frontier Logo
6:05 am - 5:37 pm
MDW
-
STL
11h 32m
1 stop
Frontier Logo
4:57 pm - 9:51 am
STL
-
MDW
16h 54m
1 stop
$255Frontier
Thu, Aug 6 - Sat, Aug 8
Frontier Logo
1:50 pm - 8:57 am
ORD
-
STL
19h 07m
1 stop
Frontier Logo
4:57 pm - 8:02 am
STL
-
ORD
15h 05m
1 stop
$255Frontier
Tue, Jul 21 - Fri, Jul 24
Frontier Logo
9:57 pm - 7:23 pm
ORD
-
STL
21h 26m
1 stop
Frontier Logo
4:57 pm - 7:53 am
STL
-
ORD
14h 56m
1 stop
$256Frontier
Sat, Jul 25 - Sun, Jul 26
Frontier Logo
7:15 am - 6:15 pm
ORD
-
STL
11h 00m
1 stop
Frontier Logo
7:10 pm - 5:37 am
STL
-
ORD
10h 27m
1 stop
$257Frontier
Thu, Aug 6 - Sat, Aug 8
United Airlines Logo
12:55 pm - 2:23 pm
ORD
-
STL
1h 28mnonstop
United Airlines Logo
1:18 pm - 2:48 pm
STL
-
ORD
1h 30mnonstop
$261United Airlines
Sat, Jul 4 - Fri, Jul 10
Multiple Airlines Logo
8:21 pm - 11:59 pm
SPI
-
STL
27h 38m
1 stop
Multiple Airlines Logo
4:57 pm - 7:41 pm
STL
-
SPI
26h 44m
2 stops
$432Multiple Airlines
Sat, Jul 4 - Fri, Jul 10
Multiple Airlines Logo
8:21 pm - 11:59 pm
SPI
-
STL
27h 38m
1 stop
Multiple Airlines Logo
4:09 pm - 7:41 pm
STL
-
SPI
27h 32m
1 stop
$480Multiple Airlines
Sun, Jul 12 - Sun, Jul 19
American Airlines Logo
2:55 pm - 1:53 pm
SPI
-
STL
46h 58m
1 stop
American Airlines Logo
7:55 pm - 2:24 pm
STL
-
SPI
42h 29m
1 stop
$1,051American Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$55
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 1% 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)