How does KAYAK find such low prices on flights from Missouri to Chicago O'Hare Airport?

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 Missouri to Chicago O'Hare Airport.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Missouri to Chicago O'Hare Airport?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from Missouri 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 Missouri to Chicago O'Hare Airport?

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 Chicago O'Hare Airport with an airline and back to Missouri with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Missouri to Chicago O'Hare Airport?

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 Chicago O'Hare Airport from Missouri up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$59 CHEAP FLIGHTS from Missouri to Chicago O'Hare (ORD)

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Cheap Flights from Missouri to O'Hare Intl

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 Missouri to O'Hare Intl

Sat, Oct 3 - Sat, Oct 10

3:35 pm - 5:20 pmUIN Quincy Regional-ORD Chicago O'Hare Intl

1h 45mnonstop

12:30 pm - 1:55 pmORD Chicago O'Hare Intl-UIN Quincy Regional

1h 25mnonstop

$103Contour

Tue, Sep 29 - Sat, Oct 3

3:25 pm - 5:10 pmUIN Quincy Regional-ORD Chicago O'Hare Intl

1h 45mnonstop

12:30 pm - 1:55 pmORD Chicago O'Hare Intl-UIN Quincy Regional

1h 25mnonstop

$104Contour

Thu, Dec 10 - Wed, Jan 13

7:26 am - 9:00 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 34mnonstop

4:59 pm - 6:29 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 30mnonstop

$117American Airlines

Thu, Nov 5 - Sat, Nov 7

7:26 am - 9:00 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 34mnonstop

10:39 pm - 11:59 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 20mnonstop

$117American Airlines

Wed, Sep 30 - Wed, Sep 30

8:00 am - 9:31 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 31mnonstop

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

1h 31mnonstop

$117United Airlines

Wed, Oct 7 - Wed, Oct 14

8:00 am - 9:31 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 31mnonstop

10:40 am - 12:13 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 33mnonstop

$117United Airlines

Thu, Oct 22 - Wed, Oct 28

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

6h 33m1 stop Dallas/Fort Worth

7:15 am - 5:40 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

10h 25m1 stop Atlanta Hartsfield-Jackson

$118Frontier

Wed, Oct 28 - Wed, Nov 4

6:44 pm - 8:56 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

14h 12m1 stop Atlanta Hartsfield-Jackson

7:15 am - 5:40 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

10h 25m1 stop Atlanta Hartsfield-Jackson

$133Frontier

Sat, Oct 3 - Sat, Oct 10

5:40 pm - 9:38 pmMCI Kansas City-ORD Chicago O'Hare Intl

3h 58m1 stop Minneapolis St Paul

5:30 pm - 10:20 pmORD Chicago O'Hare Intl-MCI Kansas City

4h 50m1 stop Minneapolis St Paul

$257Delta

Sat, Dec 12 - Wed, Dec 16

12:32 pm - 4:43 pmMCI Kansas City-ORD Chicago O'Hare Intl

4h 11m1 stop Minneapolis St Paul

9:59 am - 2:49 pmORD Chicago O'Hare Intl-MCI Kansas City

4h 50m1 stop Minneapolis St Paul

$257Delta

Recent last minute flight deals from Missouri to O'Hare Intl

Fri, Sep 18 - Fri, Sep 25

9:55 am - 11:40 amUIN Quincy Regional-ORD Chicago O'Hare Intl

1h 45mnonstop

12:30 pm - 1:55 pmORD Chicago O'Hare Intl-UIN Quincy Regional

1h 25mnonstop

$143Contour

Sat, Sep 19 - Wed, Sep 23

3:25 pm - 5:10 pmUIN Quincy Regional-ORD Chicago O'Hare Intl

1h 45mnonstop

12:30 pm - 1:55 pmORD Chicago O'Hare Intl-UIN Quincy Regional

1h 25mnonstop

$188Contour

Fri, Sep 18 - Tue, Sep 29

8:32 pm - 12:23 amMCI Kansas City-ORD Chicago O'Hare Intl

27h 51m1 stop Denver Intl

6:30 am - 7:37 pmORD Chicago O'Hare Intl-MCI Kansas City

13h 07m1 stop Denver Intl

$278Frontier

Sat, Sep 19 - Tue, Sep 22

8:32 pm - 12:23 amMCI Kansas City-ORD Chicago O'Hare Intl

27h 51m1 stop Denver Intl

6:30 am - 7:37 pmORD Chicago O'Hare Intl-MCI Kansas City

13h 07m1 stop Denver Intl

$319Frontier

Fri, Sep 18 - Fri, Sep 25

6:32 pm - 8:30 pmCOU Columbia Regional-ORD Chicago O'Hare Intl

1h 58mnonstop

4:31 pm - 6:02 pmORD Chicago O'Hare Intl-COU Columbia Regional

1h 31mnonstop

$329American Airlines

Sun, Sep 20 - Sat, Sep 26

11:17 am - 1:00 pmCOU Columbia Regional-ORD Chicago O'Hare Intl

1h 43mnonstop

9:00 am - 10:39 amORD Chicago O'Hare Intl-COU Columbia Regional

1h 39mnonstop

$329United Airlines

Fri, Sep 18 - Wed, Sep 23

7:30 am - 9:28 amJLN Joplin-ORD Chicago O'Hare Intl

1h 58mnonstop

11:29 am - 1:18 pmORD Chicago O'Hare Intl-JLN Joplin

1h 49mnonstop

$341United Airlines

Fri, Sep 18 - Sun, Sep 20

5:44 am - 7:30 amCOU Columbia Regional-ORD Chicago O'Hare Intl

1h 46mnonstop

8:24 am - 9:56 amORD Chicago O'Hare Intl-COU Columbia Regional

1h 32mnonstop

$359American Airlines

Fri, Sep 18 - Fri, Sep 25

2:40 pm - 10:59 pmUIN Quincy Regional-ORD Chicago O'Hare Intl

32h 19m2 stops Nashville Intl Orlando

12:30 pm - 1:55 pmORD Chicago O'Hare Intl-UIN Quincy Regional

1h 25mnonstop

$450Multiple Airlines

Sat, Sep 19 - Sun, Sep 20

3:59 pm - 9:38 pmMCI Kansas City-ORD Chicago O'Hare Intl

5h 39m1 stop Minneapolis St Paul

6:10 am - 11:27 amORD Chicago O'Hare Intl-MCI Kansas City

5h 17m1 stop Minneapolis St Paul

$463Delta

Recent direct flight deals from Missouri to O'Hare Intl

Sat, Oct 3 - Sat, Oct 10

3:35 pm - 5:20 pmUIN Quincy Regional-ORD Chicago O'Hare Intl

1h 45mnonstop

12:30 pm - 1:55 pmORD Chicago O'Hare Intl-UIN Quincy Regional

1h 25mnonstop

$103Contour

Tue, Sep 29 - Sat, Oct 3

3:25 pm - 5:10 pmUIN Quincy Regional-ORD Chicago O'Hare Intl

1h 45mnonstop

12:30 pm - 1:55 pmORD Chicago O'Hare Intl-UIN Quincy Regional

1h 25mnonstop

$104Contour

Sat, Sep 26 - Wed, Sep 30

3:25 pm - 5:10 pmUIN Quincy Regional-ORD Chicago O'Hare Intl

1h 45mnonstop

12:30 pm - 1:55 pmORD Chicago O'Hare Intl-UIN Quincy Regional

1h 25mnonstop

$104Contour

Sun, Oct 4 - Wed, Oct 7

9:55 am - 11:40 amUIN Quincy Regional-ORD Chicago O'Hare Intl

1h 45mnonstop

12:30 pm - 1:55 pmORD Chicago O'Hare Intl-UIN Quincy Regional

1h 25mnonstop

$104Contour

Thu, Dec 10 - Wed, Jan 13

7:26 am - 9:00 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 34mnonstop

4:59 pm - 6:29 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 30mnonstop

$117American Airlines

Thu, Nov 5 - Sat, Nov 7

7:26 am - 9:00 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 34mnonstop

10:39 pm - 11:59 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 20mnonstop

$117American Airlines

Wed, Sep 30 - Wed, Sep 30

8:00 am - 9:31 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 31mnonstop

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

1h 31mnonstop

$117United Airlines

Wed, Oct 7 - Wed, Oct 14

8:00 am - 9:31 amSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 31mnonstop

10:40 am - 12:13 pmORD Chicago O'Hare Intl-STL Lambert-St Louis

1h 33mnonstop

$117United Airlines

Sat, Oct 10 - Mon, Oct 12

11:31 am - 12:59 pmSTL Lambert-St Louis-ORD Chicago O'Hare Intl

1h 28mnonstop

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

1h 19mnonstop

$117American Airlines

Wed, Dec 9 - Sun, Dec 20

5:02 am - 6:59 amJLN Joplin-ORD Chicago O'Hare Intl

1h 57mnonstop

10:31 am - 12:43 pmORD Chicago O'Hare Intl-JLN Joplin

2h 12mnonstop

$241United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$59

Best time to beat the crowds with an average 15% drop in price.

Most popular time to fly with an average 16% increase in price.

Flight from St. Louis to Chicago O'Hare Airport

Verified travelerFlew with American Airlines-May 2026

Arrive airport early, esp if checking bags - std procedure but vital here

valerieFlew with Air Canada-Jan 2025

Usually it is unreliable - always leave lots of time for connection.

How does KAYAK find such low prices on flights from Missouri to Chicago O'Hare Airport?
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 Missouri to Chicago O'Hare Airport.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Missouri to Chicago O'Hare Airport?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from Missouri 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 Missouri to Chicago O'Hare Airport?
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 Chicago O'Hare Airport with an airline and back to Missouri with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Missouri to Chicago O'Hare Airport?
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 Chicago O'Hare Airport from Missouri up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Merrillville

Gurnee

South Haven

Oak Brook

Tinley Park

Hammond

Saint Joseph

Des Plaines

Elk Grove Village

Hoffman Estates

Portage

South Holland

Oakbrook Terrace

Willowbrook

Lansing

Alsip

Delavan

Lisle

Northbrook

Valparaiso

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$59 Find Cheap Flights from Missouri to Chicago O'Hare Airport - Compare and Save

Cheap Flights from Missouri to O'Hare Intl

Recent round-trip flight deals from Missouri to O'Hare Intl

Recent one-way flight deals from Missouri to O'Hare Intl

Recent last minute flight deals from Missouri to O'Hare Intl

Recent direct flight deals from Missouri to O'Hare Intl

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Flights from Missouri to O'Hare Intl: the best tips from KAYAK users

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