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.

$59 CHEAP FLIGHTS from Illinois to St. Louis

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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, Sep 25 - Fri, Oct 2

7:50 pm - 9:21 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 31mnonstop

11:35 am - 1:11 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 36mnonstop

$151United Airlines

Fri, Oct 9 - Fri, Oct 16

11:00 pm - 12:19 amORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 19mnonstop

5:00 am - 6:26 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 26mnonstop

$151American Airlines

Mon, Oct 5 - Mon, Oct 12

8:55 pm - 11:32 amORD Chicago O'Hare Intl-STL Lambert-St Louis

14h 37m1 stop Las Vegas Harry Reid Intl

5:53 pm - 12:26 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

6h 33m1 stop Dallas/Fort Worth

$151Frontier

Thu, Oct 8 - Thu, Oct 15

6:20 am - 4:58 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

10h 38m1 stop Dallas/Fort Worth

5:53 pm - 12:26 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

6h 33m1 stop Dallas/Fort Worth

$151Frontier

Fri, Oct 9 - Fri, Oct 16

5:50 pm - 7:00 pmMDW Chicago Midway-STL Lambert-St Louis

1h 10mnonstop

6:10 pm - 7:15 pmSTL Lambert-St Louis-MDW Chicago Midway

1h 05mnonstop

$151Southwest

Fri, Sep 25 - Fri, Oct 2

8:55 pm - 10:10 pmMDW Chicago Midway-STL Lambert-St Louis

1h 15mnonstop

10:00 pm - 11:05 pmSTL Lambert-St Louis-MDW Chicago Midway

1h 05mnonstop

$151Southwest

Fri, Oct 9 - Fri, Oct 16

11:00 pm - 12:19 amORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 19mnonstop

5:00 am - 6:26 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 26mnonstop

$152American Airlines

Fri, Oct 9 - Fri, Oct 16

11:00 pm - 12:19 amORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 19mnonstop

7:29 am - 9:00 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 31mnonstop

$152American Airlines

Mon, Sep 14 - Wed, Sep 16

8:05 pm - 9:36 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 31mnonstop

8:30 am - 10:05 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 35mnonstop

$184United Airlines

Thu, Oct 15 - Mon, Oct 19

7:50 pm - 9:21 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 31mnonstop

5:36 pm - 7:05 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 29mnonstop

$184United Airlines

Recent last minute flight deals from Illinois to St. Louis

Fri, Aug 28 - Sun, Aug 30

6:05 am - 3:28 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

9h 23m1 stop Orlando

5:02 pm - 1:20 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

20h 18m1 stop Orlando

$350Frontier

Fri, Aug 28 - Sun, Aug 30

6:05 am - 3:28 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

9h 23m1 stop Orlando

5:02 pm - 1:20 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

20h 18m1 stop Orlando

$360Frontier

Sun, Aug 30 - Mon, Aug 31

7:05 am - 5:22 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

10h 17m1 stop Atlanta Hartsfield-Jackson

4:23 pm - 11:08 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

6h 45m1 stop Orlando

$360Frontier

Sat, Aug 29 - Sat, Sep 5

10:30 am - 12:03 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 33mnonstop

8:30 am - 10:06 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 36mnonstop

$436United Airlines

Sat, Aug 29 - Sat, Sep 5

6:15 pm - 7:30 pmMDW Chicago Midway-STL Lambert-St Louis

1h 15mnonstop

8:25 am - 9:30 amSTL Lambert-St Louis-MDW Chicago Midway

1h 05mnonstop

$436Southwest

Sat, Aug 29 - Sat, Sep 5

1:20 pm - 7:50 pmMDW Chicago Midway-STL Lambert-St Louis

6h 30m1 stop Washington, D.C. Reagan-National

3:00 pm - 4:10 pmSTL Lambert-St Louis-MDW Chicago Midway

1h 10mnonstop

$446Southwest

Sat, Aug 29 - Wed, Sep 2

11:30 am - 12:55 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 25mnonstop

4:50 pm - 6:29 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 39mnonstop

$487American Airlines

Sun, Aug 30 - Tue, Sep 8

7:00 am - 8:24 amORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 24mnonstop

4:50 pm - 6:29 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 39mnonstop

$494American Airlines

Mon, Aug 31 - Thu, Sep 3

7:05 am - 8:39 amORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 34mnonstop

5:30 pm - 7:01 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 31mnonstop

$509United Airlines

Mon, Aug 31 - Thu, Sep 3

7:05 am - 8:39 amORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 34mnonstop

5:30 pm - 7:01 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 31mnonstop

$528United Airlines

Recent direct flight deals from Illinois to St. Louis

Fri, Sep 25 - Fri, Oct 2

7:50 pm - 9:21 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 31mnonstop

11:35 am - 1:11 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 36mnonstop

$151United Airlines

Fri, Oct 9 - Fri, Oct 16

11:00 pm - 12:19 amORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 19mnonstop

5:00 am - 6:26 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 26mnonstop

$151American Airlines

Fri, Oct 9 - Fri, Oct 16

5:50 pm - 7:00 pmMDW Chicago Midway-STL Lambert-St Louis

1h 10mnonstop

6:10 pm - 7:15 pmSTL Lambert-St Louis-MDW Chicago Midway

1h 05mnonstop

$151Southwest

Fri, Sep 25 - Fri, Oct 2

8:55 pm - 10:10 pmMDW Chicago Midway-STL Lambert-St Louis

1h 15mnonstop

10:00 pm - 11:05 pmSTL Lambert-St Louis-MDW Chicago Midway

1h 05mnonstop

$151Southwest

Fri, Oct 9 - Fri, Oct 16

11:00 pm - 12:19 amORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 19mnonstop

5:00 am - 6:26 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 26mnonstop

$152American Airlines

Fri, Oct 9 - Fri, Oct 16

11:00 pm - 12:19 amORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 19mnonstop

7:29 am - 9:00 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 31mnonstop

$152American Airlines

Sat, Oct 10 - Sat, Oct 17

7:10 pm - 8:20 pmMDW Chicago Midway-STL Lambert-St Louis

1h 10mnonstop

6:05 am - 7:10 amSTL Lambert-St Louis-MDW Chicago Midway

1h 05mnonstop

$183Southwest

Mon, Sep 14 - Wed, Sep 16

8:05 pm - 9:36 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 31mnonstop

8:30 am - 10:05 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 35mnonstop

$184United Airlines

Thu, Oct 15 - Mon, Oct 19

7:50 pm - 9:21 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 31mnonstop

5:36 pm - 7:05 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 29mnonstop

$184United Airlines

Sat, Dec 5 - Mon, Dec 7

8:28 pm - 9:57 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 29mnonstop

6:33 am - 8:00 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 27mnonstop

$187United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$59

Best time to beat the crowds with an average 8% drop in price.

Most popular time to fly with an average 9% 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.

Fenton

O'Fallon

Wentzville

Farmington

Eureka

Litchfield

Grafton

Shrewsbury

Glencoe

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

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Complete your trip

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

St. Louis (STL)

STL

$59 Find Cheap Flights from Illinois to St. Louis - Compare and Save

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

Low season

High season

Cheapest flight

FAQs for booking flights from Illinois to St. Louis

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