What is the cheapest airline that flies from Chicago O'Hare Intl to Illinois?

Contour, United Airlines, and American Airlines are the most popular carriers operating from Chicago O'Hare Intl to Illinois

How many flights depart from Chicago O'Hare Intl Airport to Illinois on average per day?

122 flights are operational daily from Chicago O'Hare Intl Airport to Illinois as of July 2026. The most popular departure time for this route is 11:00PM, with 39% of flights per day taking off in the afternoon.

How many flights depart from Chicago O'Hare Intl Airport to Illinois on average per week?

As of July 2026, 856 flights take off from Chicago O'Hare Intl Airport and land in Illinois each week. The most common flight departure day for this route is Fri, with 17% of weekly flights taking off on this day.

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?

There are 4 operators available for flights from Chicago O'Hare Intl Airport to Illinois as of July 2026.

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.

$51 Cheap Flights from Chicago O'Hare Intl Airport to Illinois in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago O'Hare Intl Airport to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:50 pm - 7:15 pm

ORD

BRL

1h 25mnonstop

3:35 pm - 5:10 pm

BRL

ORD

1h 35mnonstop

$98Contour

Wed, Aug 5 - Sun, Aug 9

12:15 pm - 1:35 pm

ORD

BRL

1h 20mnonstop

9:10 am - 10:35 am

BRL

ORD

1h 25mnonstop

$99Contour

Sun, Jul 26 - Tue, Jul 28

4:45 pm - 5:56 pm

ORD

DEC

1h 11mnonstop

6:45 pm - 7:53 pm

DEC

ORD

1h 08mnonstop

$149United Airlines

Fri, Jul 31 - Fri, Aug 7

7:45 am - 8:57 am

ORD

DEC

1h 12mnonstop

6:45 pm - 7:53 pm

DEC

ORD

1h 08mnonstop

$158United Airlines

Wed, Jul 29 - Wed, Aug 5

5:00 pm - 6:11 pm

ORD

MLI

1h 11mnonstop

11:43 am - 12:59 pm

MLI

ORD

1h 16mnonstop

$238American Airlines

Fri, Aug 7 - Fri, Aug 14

11:00 pm - 12:08 am

ORD

MLI

1h 08mnonstop

6:00 am - 7:19 am

MLI

ORD

1h 19mnonstop

$239American Airlines

Fri, Aug 7 - Fri, Aug 14

7:05 am - 5:37 pm

ORD

STL

10h 32m

1 stop

6:17 pm - 1:20 pm

STL

ORD

19h 03m

2 stops

$298Frontier

Sun, Aug 16 - Sun, Aug 23

7:05 am - 5:37 pm

ORD

STL

10h 32m

1 stop

6:17 pm - 1:20 pm

STL

ORD

19h 03m

2 stops

$299Frontier

Sun, Aug 16 - Sun, Aug 23

7:05 am - 8:45 am

ORD

BMI

25h 40m

2 stops

8:14 pm - 9:11 am

BMI

ORD

12h 57m

1 stop

$395Multiple Airlines

Sun, Aug 2 - Sun, Aug 9

7:05 am - 7:37 pm

ORD

PIA

12h 32m

2 stops

10:07 am - 1:36 pm

PIA

ORD

27h 29m

1 stop

$408Multiple Airlines

Sun, Aug 16 - Sun, Aug 23

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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 15

ORD6:59 amChicago O'Hare Intl

9h 45m

2 stops

STL4:44 pmLambert-St Louis

Aug 22

STL6:30 amLambert-St Louis

4h 12m

1 stop

ORD10:42 amChicago O'Hare Intl

$333

Delta

Sep 4

ORD1:59 pmChicago O'Hare Intl

6h 43m

1 stop

STL8:42 pmLambert-St Louis

Sep 6

STL10:33 amLambert-St Louis

5h 44m

1 stop

ORD4:17 pmChicago O'Hare Intl

$357

Delta

Aug 15

ORD6:59 amChicago O'Hare Intl

9h 45m

2 stops

STL4:44 pmLambert-St Louis

Aug 22

STL6:30 amLambert-St Louis

4h 12m

1 stop

ORD10:42 amChicago O'Hare Intl

$361

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

Aug 7

ORD5:00 pmChicago O'Hare Intl

1h 11m

MLI6:11 pmMoline Quad-City

Aug 14

MLI11:43 amMoline Quad-City

1h 16m

ORD12:59 pmChicago O'Hare Intl

$238

American Airlines

Aug 7

ORD11:00 pmChicago O'Hare Intl

1h 08m

MLI12:08 amMoline Quad-City

Aug 14

MLI6:00 amMoline Quad-City

1h 19m

ORD7:19 amChicago O'Hare Intl

$239

American Airlines

Aug 15

ORD5:05 pmChicago O'Hare Intl

1h 11m

MLI6:16 pmMoline Quad-City

Aug 22

MLI7:22 pmMoline Quad-City

1h 30m

ORD8:52 pmChicago O'Hare Intl

$240

momondo Fare Finder

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

Cheapest round-trip

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Wed 8/5

5:50 pm-7:15 pm

Nonstop1h 25m

Burlington

Sun 8/9

3:35 pm-5:10 pm

Nonstop1h 35m

$98

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Sun 7/26

12:15 pm-1:35 pm

Nonstop1h 20m

Burlington

Tue 7/28

9:10 am-10:35 am

Nonstop1h 25m

$99

Quickest round-trip

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 7/31

4:45 pm-5:56 pm

Nonstop1h 11m

Decatur Arpt

Fri 8/7

6:45 pm-7:53 pm

Nonstop1h 08m

$149

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Wed 7/29

7:45 am-8:57 am

Nonstop1h 12m

Decatur Arpt

Wed 8/5

6:45 pm-7:53 pm

Nonstop1h 08m

$158

ChicagoMoline

ORD - MLI

ORDMLI

Chicago O'Hare Intl

Fri 8/7

5:00 pm-6:11 pm

Nonstop1h 11m

Moline Quad-City

Fri 8/14

11:43 am-12:59 pm

Nonstop1h 16m

$238

ChicagoMoline

ORD - MLI

ORDMLI

Chicago O'Hare Intl

Fri 8/7

11:00 pm-12:08 am

Nonstop1h 08m

Moline Quad-City

Fri 8/14

6:00 am-7:19 am

Nonstop1h 19m

$239

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sun 8/16

7:05 am-5:37 pm

1 stop10h 32m

Lambert-St Louis

Sun 8/23

6:17 pm-1:20 pm

2 stops19h 03m

$298

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sun 8/16

7:05 am-5:37 pm

1 stop10h 32m

Lambert-St Louis

Sun 8/23

6:17 pm-1:20 pm

2 stops19h 03m

$299

ChicagoBloomington

ORD - BMI

ORDBMI

Chicago O'Hare Intl

Sun 8/2

7:05 am-8:45 am

2 stops25h 40m

Bloomington-Normal

Sun 8/9

8:14 pm-9:11 am

1 stop12h 57m

$395

ChicagoPeoria

ORD - PIA

ORDPIA

Chicago O'Hare Intl

Sun 8/16

7:05 am-7:37 pm

2 stops12h 32m

Greater Peoria

Sun 8/23

10:07 am-1:36 pm

1 stop27h 29m

$408

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Chicago O'Hare Intl Airport is in April. Flight prices, which tend to average around $121, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of April, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $128.

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 Airport to Illinois flights?

There are 3 cabin classes available to choose from on Chicago O'Hare Intl Airport 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	$77
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 $77. The best round-trip flight deal from Chicago O'Hare Intl Airport to Illinois found on momondo in the last 72 hours is $180.

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), Greater Peoria (PIA), Moline Quad-City (MLI), Springfield Capital (SPI) and 2 more.

Search flight deals

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Illinois

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?
There are 4 operators available for flights from Chicago O'Hare Intl Airport to Illinois as of July 2026.
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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Chicago O'Hare Intl Airport to Illinois is Airbus A319 (15.22% of total bookings). The next most popular plane models are Embraer 170 (11.80%), Embraer 175 (10.25%), and Canadair (Bombardier) Regional Jet 700 (9.63%).

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
American Airlines	PriceFrom $168	Free Cancellation	Rating 7.1 11,782 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.