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>

$69 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

Fri, May 22 - Tue, May 26

9:30 pm - 10:45 pm

MDW

STL

1h 15mnonstop

1:45 pm - 2:55 pm

STL

MDW

1h 10mnonstop

$248Southwest

Fri, May 22 - Tue, May 26

2:58 pm - 4:30 pm

ORD

STL

1h 32mnonstop

6:00 am - 7:29 am

STL

ORD

1h 29mnonstop

$248American Airlines

Thu, Jun 11 - Sat, Jun 27

6:00 am - 5:30 pm

MDW

STL

11h 30m

1 stop

5:06 pm - 10:11 pm

STL

MDW

5h 05m

1 stop

$250Frontier

Thu, Jun 11 - Sun, Jun 14

12:31 pm - 6:18 pm

ORD

STL

5h 47m

1 stop

2:56 pm - 5:07 am

STL

ORD

14h 11m

1 stop

$250Frontier

Wed, Jun 3 - Wed, Jun 10

12:04 pm - 11:57 pm

MDW

STL

11h 53m

2 stops

7:04 pm - 3:15 pm

STL

MDW

20h 11m

1 stop

$251Frontier

Fri, Jun 19 - Fri, Jun 26

9:10 am - 6:18 pm

ORD

STL

9h 08m

1 stop

2:56 pm - 5:07 am

STL

ORD

14h 11m

1 stop

$251Frontier

Fri, May 22 - Tue, May 26

7:52 pm - 7:31 pm

ORD

STL

23h 39m

2 stops

6:33 pm - 7:55 am

STL

ORD

13h 22m

1 stop

$253Frontier

Fri, Jun 12 - Tue, Jun 16

7:16 pm - 11:23 pm

MDW

STL

4h 07m

1 stop

9:21 am - 4:16 pm

STL

MDW

6h 55m

1 stop

$257Delta

Fri, Jun 12 - Tue, Jun 16

11:30 am - 5:23 pm

ORD

STL

5h 53m

1 stop

6:30 am - 1:04 pm

STL

ORD

6h 34m

1 stop

$257Delta

Fri, May 22 - Tue, May 26

6:47 pm - 11:44 pm

ORD

STL

4h 57m

1 stop

6:00 am - 7:29 am

STL

ORD

1h 29mnonstop

$258American Airlines

Useful Info

Low season	January
High season	May
Cheapest flight	$69

Best time to beat the crowds with an average 1% drop in price.

Most popular time to fly with an average 2% increase in price.

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

$69 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