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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$49 CHEAP FLIGHTS from Illinois to St. Louis

STL

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

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Cheap Flights from Illinois to St. Louis

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Illinois to St. Louis

Mon, Mar 30 - Thu, Apr 2

7:40 pm - 9:08 pm

ORD

STL

1h 28mnonstop

8:15 pm - 9:44 pm

STL

ORD

1h 29mnonstop

$231United Airlines

Thu, Mar 26 - Mon, Mar 30

7:50 pm - 9:15 pm

ORD

STL

1h 25mnonstop

10:00 am - 11:29 am

STL

ORD

1h 29mnonstop

$232United Airlines

Fri, May 8 - Sun, May 10

4:28 pm - 6:50 am

ORD

STL

14h 22m

1 stop

4:55 pm - 10:23 am

STL

ORD

17h 28m

2 stops

$234Multiple Airlines

Fri, May 15 - Sun, May 17

2:20 pm - 6:50 am

MDW

STL

16h 30m

1 stop

9:55 pm - 10:21 pm

STL

MDW

24h 26m

2 stops

$235Frontier

Thu, May 21 - Tue, Jun 2

9:48 pm - 9:55 am

ORD

STL

12h 07m

1 stop

4:44 pm - 11:41 pm

STL

ORD

6h 57m

1 stop

$235Frontier

Sun, May 24 - Wed, May 27

9:48 pm - 9:55 am

ORD

STL

12h 07m

1 stop

4:44 pm - 11:41 pm

STL

ORD

6h 57m

1 stop

$236Frontier

Wed, Mar 25 - Fri, Mar 27

2:40 pm - 10:40 pm

ORD

STL

8h 00m

1 stop

6:15 am - 3:05 pm

STL

ORD

8h 50m

1 stop

$243Southwest

Fri, Apr 3 - Sat, Apr 4

11:15 am - 12:30 pm

MDW

STL

1h 15mnonstop

5:10 am - 6:20 am

STL

MDW

1h 10mnonstop

$244Southwest

Mon, Jul 27 - Fri, Jul 31

6:00 am - 8:26 pm

SPI

STL

14h 26m

1 stop

7:15 am - 2:20 pm

STL

SPI

31h 05m

1 stop

$744American Airlines

Sun, Mar 29 - Sun, Apr 5

6:37 pm - 8:51 am

SPI

STL

38h 14m

1 stop

6:33 pm - 2:19 pm

STL

SPI

43h 46m

1 stop

$770American Airlines

Useful Info

Low season	January
High season	April
Cheapest flight	$49

Best time to beat the crowds but there is an average 8% increase in price.

Most popular time to fly and prices are also 3% lower on average.

Flight from Chicago Midway Airport 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.

O'Fallon

Wentzville

Farmington

Eureka

Litchfield

Grafton

Shrewsbury

Glencoe

Everything you need to know for your flight to St. Louis

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Information on the airport you'll fly into in St. Louis

St. Louis (STL)

STL

$49 Find Cheap Flights from Illinois to St. Louis

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

Cheap Flights from Illinois to St. Louis

Recent round-trip flight deals from Illinois to St. Louis

Recent one-way flight deals from Illinois to St. Louis

Recent last minute flight deals from Illinois to St. Louis

Recent direct flight deals from Illinois to St. Louis

Good to know

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?

Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis

Cabin class types available on flights to Illinois

Complete your trip to St. Louis with a hotel stay or car rental

Find direct flights for St. Louis

Flights to other popular destinations

Flights from domestic origins to St. Louis

Choose which airport to fly into in St. Louis