Cheap flights from Chicago O'Hare Intl Airport to Illinois from $46

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 8/20. 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

United Airlines Logo
1:05 pm - 2:33 pmORD-STL
1h 28mnonstop
United Airlines Logo
6:35 am - 8:05 amSTL-ORD
1h 30mnonstop
$91United Airlines
Find Deal
Wed, Aug 27 - Wed, Sep 3
American Airlines Logo
8:31 pm - 9:53 pmORD-STL
1h 22mnonstop
American Airlines Logo
6:10 am - 7:30 amSTL-ORD
1h 20mnonstop
$92American Airlines
Find Deal
Sat, Sep 13 - Sat, Sep 20
Contour Logo
12:50 pm - 2:10 pmORD-BRL
1h 20mnonstop
Contour Logo
3:25 pm - 4:45 pmBRL-ORD
1h 20mnonstop
$103Contour
Find Deal
Wed, Sep 24 - Mon, Sep 29
Contour Logo
5:35 pm - 6:55 pmORD-BRL
1h 20mnonstop
Contour Logo
3:25 pm - 4:45 pmBRL-ORD
1h 20mnonstop
$104Contour
Find Deal
Thu, Aug 21 - Sun, Aug 24
United Airlines Logo
2:20 pm - 3:44 pmORD-STL
1h 24mnonstop
United Airlines Logo
3:20 pm - 4:45 pmSTL-ORD
1h 25mnonstop
$119United Airlines
Find Deal
Wed, Sep 17 - Sat, Sep 20
American Airlines Logo
6:00 pm - 7:21 pmORD-STL
1h 21mnonstop
American Airlines Logo
7:23 am - 8:48 amSTL-ORD
1h 25mnonstop
$120American Airlines
Find Deal
Sat, Aug 23 - Sun, Aug 24
Southwest Logo
3:10 pm - 8:05 pmORD-STL
4h 55m1 stop
Southwest Logo
6:25 am - 12:45 pmSTL-ORD
6h 20m1 stop
$141Southwest
Find Deal
Wed, Aug 27 - Wed, Sep 3
Southern / Mokulele Logo
8:15 am - 12:00 pmORD-STL
3h 45m1 stop
Southern / Mokulele Logo
9:20 am - 4:19 pmSTL-ORD
6h 59m1 stop
$167Southern / Mokulele
Find Deal
Fri, Sep 12 - Fri, Sep 19
Southern / Mokulele Logo
1:10 pm - 12:10 pmORD-STL
23h 00m1 stop
Southern / Mokulele Logo
5:15 pm - 7:37 amSTL-ORD
14h 22m1 stop
$168Southern / Mokulele
Find Deal
Sat, Aug 23 - Sun, Aug 24
Southwest Logo
2:55 pm - 8:30 pmORD-STL
5h 35m1 stop
Southwest Logo
6:35 am - 12:45 pmSTL-ORD
6h 10m1 stop
$171Southwest
Find Deal
Sat, Aug 30 - Sat, Sep 6

Delta flights from Chicago O'Hare Intl Airport to Illinois

Our best Delta deals on Chicago O'Hare Intl Airport to Illinois flight tickets
Delta
Aug 19
ORD9:47 amChicago O'Hare Intl
4h 54m
1 stop
STL2:41 pmLambert-St Louis
Aug 21
STL5:11 pmLambert-St Louis
6h 45m
1 stop
ORD11:56 pmChicago O'Hare Intl
Delta
Aug 23
ORD2:25 pmChicago O'Hare Intl
8h 59m
2 stops
STL11:24 pmLambert-St Louis
Aug 24
STL5:11 pmLambert-St Louis
6h 45m
1 stop
ORD11:56 pmChicago O'Hare Intl
Delta
Aug 26
ORD2:00 pmChicago O'Hare Intl
9h 24m
2 stops
STL11:24 pmLambert-St Louis
Aug 31
STL6:00 amLambert-St Louis
6h 45m
2 stops
ORD12:45 pmChicago O'Hare Intl

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
Sep 13
ORD8:31 pmChicago O'Hare Intl
1h 22m
STL9:53 pmLambert-St Louis
Sep 20
STL6:10 amLambert-St Louis
1h 20m
ORD7:30 amChicago O'Hare Intl
American Airlines
Aug 23
ORD6:00 pmChicago O'Hare Intl
1h 21m
STL7:21 pmLambert-St Louis
Aug 24
STL7:23 amLambert-St Louis
1h 25m
ORD8:48 amChicago O'Hare Intl
American Airlines
Aug 19
ORD8:45 pmChicago O'Hare Intl
1h 32m
STL10:17 pmLambert-St Louis
Aug 21
STL7:23 amLambert-St Louis
1h 25m
ORD8:48 amChicago O'Hare Intl

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 July 31, 2025.
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

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 8/27

1:05 pm-2:33 pm

Nonstop1h 28m

Lambert-St Louis

Wed 9/3

6:35 am-8:05 am

Nonstop1h 30m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 9/13

8:31 pm-9:53 pm

Nonstop1h 22m

Lambert-St Louis

Sat 9/20

6:10 am-7:30 am

Nonstop1h 20m

$92

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Wed 9/24

12:50 pm-2:10 pm

Nonstop1h 20m

Burlington

Mon 9/29

3:25 pm-4:45 pm

Nonstop1h 20m

$103

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Thu 8/21

5:35 pm-6:55 pm

Nonstop1h 20m

Burlington

Sun 8/24

3:25 pm-4:45 pm

Nonstop1h 20m

$104

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 9/17

2:20 pm-3:44 pm

Nonstop1h 24m

Lambert-St Louis

Sat 9/20

3:20 pm-4:45 pm

Nonstop1h 25m

$119

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/23

6:00 pm-7:21 pm

Nonstop1h 21m

Lambert-St Louis

Sun 8/24

7:23 am-8:48 am

Nonstop1h 25m

$120

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 8/27

3:10 pm-8:05 pm

1 stop4h 55m

Lambert-St Louis

Wed 9/3

6:25 am-12:45 pm

1 stop6h 20m

$141

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 9/12

8:15 am-12:00 pm

1 stop3h 45m

Lambert-St Louis

Fri 9/19

9:20 am-4:19 pm

1 stop6h 59m

$167

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/23

1:10 pm-12:10 pm

1 stop23h 00m

Lambert-St Louis

Sun 8/24

5:15 pm-7:37 am

1 stop14h 22m

$168

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/30

2:55 pm-8:30 pm

1 stop5h 35m

Lambert-St Louis

Sat 9/6

6:35 am-12:45 pm

1 stop6h 10m

$171

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 Greater Peoria 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 4 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

$46

Fastest flight time

0h 56m

Direct flights

Every day

Airports in Illinois

9 airports
The best one-way flight to Illinois from Chicago O'Hare Intl Airport in the past 72 hours is $46. The best round-trip flight deal from Chicago O'Hare Intl Airport to Illinois found on momondo in the last 72 hours is $91.
The fastest flight from Chicago O'Hare Intl Airport to Illinois takes 0h 56m
Direct flights go from Chicago O'Hare Intl Airport to Illinois every day.
There are 9 airports near Illinois: Decatur Arpt (DEC), Evansville Dress Regional (EVV), Greater Peoria (PIA), Lambert-St Louis (STL), Moline Quad-City (MLI), Burlington (BRL), Springfield Capital (SPI), Champaign University-Willard (CMI), Bloomington-Normal (BMI)

  • 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
8,900 reviews
Search United Airlines flights
American AirlinesPriceFrom $295Free CancellationRating
7.2
10,000 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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1 adult
Tue 8/5
Tue 8/12

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