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Cheap flights from Chicago O'Hare Intl Airport to Illinois from $42

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Illinois departing on 3/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Chicago O'Hare Intl Airport to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Contour Logo
6:25 pm - 7:45 pm
ORD
-
BRL
1h 20mnonstop
Contour Logo
8:45 am - 10:10 am
BRL
-
ORD
1h 25mnonstop
$84Contour
Fri, Mar 6 - Sun, Mar 8
Contour Logo
6:25 pm - 7:45 pm
ORD
-
BRL
1h 20mnonstop
Contour Logo
9:00 am - 10:10 am
BRL
-
ORD
1h 10mnonstop
$85Contour
Thu, Feb 26 - Sat, Feb 28
Contour Logo
6:45 pm - 8:05 pm
ORD
-
BRL
1h 20mnonstop
Contour Logo
4:40 pm - 6:05 pm
BRL
-
ORD
1h 25mnonstop
$86Contour
Mon, Apr 13 - Thu, Apr 16
United Airlines Logo
9:33 pm - 10:59 pm
ORD
-
STL
1h 26mnonstop
United Airlines Logo
8:17 am - 9:50 am
STL
-
ORD
1h 33mnonstop
$97United Airlines
Tue, Mar 10 - Wed, Mar 11
Southwest Logo
4:15 pm - 9:25 pm
ORD
-
STL
5h 10m
1 stop
Southwest Logo
7:30 am - 12:50 pm
STL
-
ORD
5h 20m
1 stop
$117Southwest
Tue, Mar 10 - Wed, Mar 11
Frontier Logo
4:42 pm - 11:49 am
ORD
-
STL
19h 07m
1 stop
Frontier Logo
2:09 pm - 8:23 am
STL
-
ORD
18h 14m
1 stop
$131Frontier
Thu, Mar 5 - Mon, Mar 9
United Airlines Logo
7:42 pm - 9:07 pm
ORD
-
STL
1h 25mnonstop
United Airlines Logo
8:17 am - 9:50 am
STL
-
ORD
1h 33mnonstop
$134United Airlines
Mon, Mar 9 - Wed, Mar 11
American Airlines Logo
8:53 pm - 10:17 pm
ORD
-
STL
1h 24mnonstop
American Airlines Logo
5:46 am - 7:16 am
STL
-
ORD
1h 30mnonstop
$135American Airlines
Thu, Apr 23 - Sat, Apr 25
American Airlines Logo
10:23 am - 11:45 am
ORD
-
STL
1h 22mnonstop
American Airlines Logo
7:05 am - 8:36 am
STL
-
ORD
1h 31mnonstop
$136American Airlines
Thu, May 7 - Wed, May 13
Frontier Logo
5:05 am - 11:49 am
ORD
-
STL
6h 44m
1 stop
Frontier Logo
2:09 pm - 8:23 am
STL
-
ORD
18h 14m
1 stop
$146Frontier
Fri, Mar 6 - Mon, Mar 9

Frontier flights from Chicago O'Hare Intl Airport to Illinois

Our best Frontier deals on Chicago O'Hare Intl Airport to Illinois flight tickets
Frontier
Mar 5
ORD4:42 pmChicago O'Hare Intl
19h 07m
1 stop
STL11:49 amLambert-St Louis
Mar 9
STL2:09 pmLambert-St Louis
18h 14m
1 stop
ORD8:23 amChicago O'Hare Intl
$131
Frontier
Mar 6
ORD5:05 amChicago O'Hare Intl
6h 44m
1 stop
STL11:49 amLambert-St Louis
Mar 9
STL2:09 pmLambert-St Louis
18h 14m
1 stop
ORD8:23 amChicago O'Hare Intl
$146
Frontier
Apr 17
ORD5:11 amChicago O'Hare Intl
9h 01m
1 stop
STL2:12 pmLambert-St Louis
Apr 19
STL11:21 amLambert-St Louis
11h 18m
1 stop
ORD10:39 pmChicago O'Hare Intl
$160

American Airlines flights from Chicago O'Hare Intl Airport to Illinois

Our best American Airlines deals on Chicago O'Hare Intl Airport to Illinois flight tickets
American Airlines
Apr 23
ORD8:53 pmChicago O'Hare Intl
1h 24m
STL10:17 pmLambert-St Louis
Apr 25
STL5:46 amLambert-St Louis
1h 30m
ORD7:16 amChicago O'Hare Intl
$135
American Airlines
May 7
ORD10:23 amChicago O'Hare Intl
1h 22m
STL11:45 amLambert-St Louis
May 13
STL7:05 amLambert-St Louis
1h 31m
ORD8:36 amChicago O'Hare Intl
$136
American Airlines
Apr 6
ORD4:40 pmChicago O'Hare Intl
1h 13m
STL5:53 pmLambert-St Louis
Apr 8
STL5:46 amLambert-St Louis
1h 30m
ORD7:16 amChicago O'Hare Intl
$144

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 12, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Fri 3/6

6:25 pm-7:45 pm

Nonstop1h 20m

Burlington

Sun 3/8

8:45 am-10:10 am

Nonstop1h 25m

$84

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Thu 2/26

6:25 pm-7:45 pm

Nonstop1h 20m

Burlington

Sat 2/28

9:00 am-10:10 am

Nonstop1h 10m

$85

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Mon 4/13

6:45 pm-8:05 pm

Nonstop1h 20m

Burlington

Thu 4/16

4:40 pm-6:05 pm

Nonstop1h 25m

$86

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 3/10

9:33 pm-10:59 pm

Nonstop1h 26m

Lambert-St Louis

Wed 3/11

8:17 am-9:50 am

Nonstop1h 33m

$97

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 3/10

4:15 pm-9:25 pm

1 stop5h 10m

Lambert-St Louis

Wed 3/11

7:30 am-12:50 pm

1 stop5h 20m

$117

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 3/5

4:42 pm-11:49 am

1 stop19h 07m

Lambert-St Louis

Mon 3/9

2:09 pm-8:23 am

1 stop18h 14m

$131

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Mon 3/9

7:42 pm-9:07 pm

Nonstop1h 25m

Lambert-St Louis

Wed 3/11

8:17 am-9:50 am

Nonstop1h 33m

$134

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 4/23

8:53 pm-10:17 pm

Nonstop1h 24m

Lambert-St Louis

Sat 4/25

5:46 am-7:16 am

Nonstop1h 30m

$135

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 5/7

10:23 am-11:45 am

Nonstop1h 22m

Lambert-St Louis

Wed 5/13

7:05 am-8:36 am

Nonstop1h 31m

$136

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 3/6

5:05 am-11:49 am

1 stop6h 44m

Lambert-St Louis

Mon 3/9

2:09 pm-8:23 am

1 stop18h 14m

$146

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest Chicago O'Hare Intl to Illinois flight route?

Fly from Chicago O'Hare Intl to Moline Quad-City for the best Chicago O'Hare Intl - Illinois flight prices

What cabin class options are available on Chicago O'Hare Intl to Illinois flights?

There are 3 cabin classes available to choose from on Chicago O'Hare Intl to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Chicago O'Hare Intl Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Illinois

Best Price Found

$258

Fastest flight time

0h 59m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Chicago O'Hare Intl Airport in the past 72 hours is $258. The best round-trip flight deal from Chicago O'Hare Intl Airport to Illinois found on momondo in the last 72 hours is $138.
The fastest flight from Chicago O'Hare Intl Airport to Illinois takes 0h 59m
Direct flights go from Chicago O'Hare Intl Airport to Illinois every day.
There are 98 airports in Illinois. From Chicago O'Hare Intl Airport there are direct flights to Decatur Arpt (DEC), Evansville Dress Regional (EVV), Greater Peoria (PIA), Lambert-St Louis (STL) and 5 more.
Search flight deals

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Illinois?

    Prices for flights from Chicago O'Hare Intl Airport to Illinois are updated daily.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Illinois?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to Illinois?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago O'Hare Intl Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Chicago O'Hare Intl Airport to Illinois?

Best airlines flying from Chicago O'Hare Intl Airport to Illinois

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Illinois with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $179Free CancellationRating
7.4
9,276 reviews
Search United Airlines flights
American AirlinesPriceFrom $363Free CancellationRating
7.2
11,267 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Chicago to Illinois for you.

Can I find flights from Chicago to Illinois with flexible booking policies on momondo?

Flights from Chicago to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Chicago to Illinois?

momondo provides multiple filters to help you find the best flight to Illinois from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Chicago to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Chicago. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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