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>

$67 CHEAP FLIGHTS from Illinois to St. Louis

STL

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

...and more

Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

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Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$145

Overall average: $336

Frontier

Fri 2/20Fri 2/27

ORD - STL • 1 stop

Cheapest non-stop

$171

Typical prices: $264-$450

United Airlines

Sat 2/21Sat 2/28

ORD - 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

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, Feb 20 - Fri, Feb 27

12:53 pm - 1:56 pm

ORD

STL

25h 03m

1 stop

8:22 pm - 10:51 am

STL

ORD

14h 29m

1 stop

$145Frontier

Thu, Feb 5 - Mon, Feb 9

2:42 pm - 6:51 am

ORD

STL

16h 09m

1 stop

8:22 pm - 10:51 am

STL

ORD

14h 29m

1 stop

$151Frontier

Thu, Feb 5 - Mon, Feb 9

2:42 pm - 6:51 am

ORD

STL

16h 09m

1 stop

8:22 pm - 10:51 am

STL

ORD

14h 29m

1 stop

$152Frontier

Thu, Feb 5 - Mon, Feb 9

5:01 pm - 6:51 am

MDW

STL

13h 50m

1 stop

8:22 pm - 7:07 pm

STL

MDW

22h 45m

1 stop

$154Frontier

Tue, Feb 3 - Wed, Feb 4

8:10 am - 6:51 am

ORD

STL

22h 41m

1 stop

8:22 pm - 11:22 am

STL

ORD

15h 00m

2 stops

$167Multiple Airlines

Thu, Feb 19 - Thu, Feb 26

7:00 am - 6:51 am

ORD

STL

23h 51m

2 stops

10:11 pm - 5:26 pm

STL

ORD

19h 15m

1 stop

$168Multiple Airlines

Wed, Feb 18 - Sat, Feb 21

12:24 pm - 1:43 pm

ORD

STL

1h 19mnonstop

6:36 pm - 8:05 pm

STL

ORD

1h 29mnonstop

$171American Airlines

Sat, Feb 14 - Mon, Feb 16

11:06 am - 3:56 pm

MDW

STL

4h 50m

1 stop

6:10 am - 1:05 pm

STL

MDW

6h 55m

1 stop

$192Delta

Wed, Feb 18 - Sat, Feb 21

9:34 am - 4:45 pm

MDW

STL

7h 11m

2 stops

6:35 am - 12:46 pm

STL

MDW

6h 11m

1 stop

$196Delta

Sat, Feb 7 - Wed, Feb 11

6:00 am - 10:20 am

SPI

STL

28h 20m

1 stop

6:00 am - 2:55 pm

STL

SPI

8h 55m

1 stop

$777American Airlines

Useful Info

Low season	January
High season	April
Cheapest flight	$67

Best time to beat the crowds but there is an average 11% increase in price.

Most popular time to fly and prices are also 5% 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

$67 Find Cheap Flights from Illinois to St. Louis

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

Everything you should know

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