How many flights depart from Chicago to Illinois on average per day?

As of March 2026, there are 108 flights per day flying from Chicago to Illinois. The most common time of day flights depart is 10:00PM, with 43% of flights taking off in the evening.

How many flights depart from Chicago to Illinois on average per week?

761 flights are operational weekly from Chicago to Illinois as of March 2026. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.

What is the cheapest airline that flies from Chicago to Illinois?

Contour, United Airlines, and Southwest are the most popular carriers operating from Chicago to Illinois

When did momondo last update prices for flights from Chicago to Illinois?

Prices for flights from Chicago to Illinois were last updated today.

How many operators does momondo search for flights from Chicago to Illinois?

The number of operators available for flights from Chicago to Illinois is 5 as of March 2026.

How old do you have to be to fly from Chicago to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago to Illinois.

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

The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$40 Cheap Flights from Chicago to Illinois in 2026

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Find the cheapest flights from Chicago to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:00 pm - 1:20 pm

ORD

BRL

1h 20mnonstop

9:10 am - 10:35 am

BRL

ORD

1h 25mnonstop

$78Contour

Sun, Apr 19 - Sun, Apr 26

12:00 pm - 1:20 pm

ORD

BRL

1h 20mnonstop

9:10 am - 10:35 am

BRL

ORD

1h 25mnonstop

$79Contour

Sun, Apr 19 - Sun, Apr 26

4:49 pm - 5:57 pm

ORD

DEC

1h 08mnonstop

7:37 pm - 8:50 pm

DEC

ORD

1h 13mnonstop

$149United Airlines

Fri, Apr 3 - Tue, Apr 7

4:50 pm - 5:51 pm

ORD

DEC

1h 01mnonstop

6:55 pm - 8:00 pm

DEC

ORD

1h 05mnonstop

$159United Airlines

Sat, Aug 29 - Wed, Sep 2

12:54 pm - 1:58 pm

ORD

CMI

1h 04mnonstop

2:28 pm - 3:43 pm

CMI

ORD

1h 15mnonstop

$229American Airlines

Tue, Apr 21 - Tue, Apr 28

9:40 am - 8:00 pm

MDW

STL

10h 20m

3 stops

9:40 pm - 10:45 pm

STL

MDW

1h 05mnonstop

$235Southwest

Tue, Apr 14 - Thu, Apr 16

4:21 pm - 11:25 pm

ORD

STL

7h 04m

1 stop

4:59 pm - 11:36 pm

STL

ORD

6h 37m

1 stop

$235Frontier

Sat, Apr 4 - Wed, Apr 8

8:53 pm - 10:17 pm

ORD

STL

1h 24mnonstop

7:05 am - 8:36 am

STL

ORD

1h 31mnonstop

$236American Airlines

Mon, Apr 20 - Wed, Apr 22

11:19 am - 11:19 pm

MDW

STL

12h 00m

1 stop

11:21 am - 10:21 pm

STL

MDW

11h 00m

1 stop

$236Frontier

Tue, Mar 31 - Sun, Apr 5

5:15 am - 11:05 am

MDW

STL

5h 50m

1 stop

8:45 pm - 9:50 pm

STL

MDW

1h 05mnonstop

$237Southwest

Sun, May 3 - Tue, May 12

Southwest flights from Chicago to Illinois

Our best Southwest deals on Chicago to Illinois flight tickets

Southwest

Apr 14

ORD11:55 amChicago O'Hare Intl

9h 20m

1 stop

STL9:15 pmLambert-St Louis

Apr 16

STL5:25 amLambert-St Louis

12h 05m

1 stop

ORD5:30 pmChicago O'Hare Intl

$234

Southwest

May 3

MDW5:15 amChicago Midway

5h 50m

1 stop

STL11:05 amLambert-St Louis

May 12

STL8:45 pmLambert-St Louis

1h 05m

MDW9:50 pmChicago Midway

$237

Southwest

Apr 14

ORD7:45 amChicago O'Hare Intl

13h 25m

1 stop

STL9:10 pmLambert-St Louis

Apr 16

STL9:40 pmLambert-St Louis

15h 10m

2 stops

ORD12:50 pmChicago O'Hare Intl

$239

Delta flights from Chicago to Illinois

Our best Delta deals on Chicago to Illinois flight tickets

Delta

May 3

ORD5:15 amChicago O'Hare Intl

5h 19m

1 stop

STL10:34 amLambert-St Louis

May 12

STL6:21 amLambert-St Louis

6h 40m

2 stops

ORD1:01 pmChicago O'Hare Intl

$262

Delta

Apr 15

ORD8:52 amChicago O'Hare Intl

7h 58m

2 stops

STL4:50 pmLambert-St Louis

Apr 20

STL12:23 pmLambert-St Louis

8h 17m

2 stops

ORD8:40 pmChicago O'Hare Intl

$267

Delta

Apr 20

MDW10:41 amChicago Midway

7h 03m

1 stop

STL5:44 pmLambert-St Louis

Apr 27

STL4:41 pmLambert-St Louis

5h 47m

1 stop

MDW10:28 pmChicago Midway

$288

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Sun 4/19

12:00 pm-1:20 pm

Nonstop1h 20m

Burlington

Sun 4/26

9:10 am-10:35 am

Nonstop1h 25m

$78

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Sun 4/19

12:00 pm-1:20 pm

Nonstop1h 20m

Burlington

Sun 4/26

9:10 am-10:35 am

Nonstop1h 25m

$79

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 4/3

4:49 pm-5:57 pm

Nonstop1h 08m

Decatur Arpt

Tue 4/7

7:37 pm-8:50 pm

Nonstop1h 13m

$149

Quickest round-trip

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Sat 8/29

4:50 pm-5:51 pm

Nonstop1h 01m

Decatur Arpt

Wed 9/2

6:55 pm-8:00 pm

Nonstop1h 05m

$159

ChicagoChampaign

ORD - CMI

ORDCMI

Chicago O'Hare Intl

Tue 4/21

12:54 pm-1:58 pm

Nonstop1h 04m

Champaign University-Willard

Tue 4/28

2:28 pm-3:43 pm

Nonstop1h 15m

$229

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 4/14

9:40 am-8:00 pm

3 stops10h 20m

Lambert-St Louis

Thu 4/16

9:40 pm-10:45 pm

Nonstop1h 05m

$235

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 4/4

4:21 pm-11:25 pm

1 stop7h 04m

Lambert-St Louis

Wed 4/8

4:59 pm-11:36 pm

1 stop6h 37m

$235

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Mon 4/20

8:53 pm-10:17 pm

Nonstop1h 24m

Lambert-St Louis

Wed 4/22

7:05 am-8:36 am

Nonstop1h 31m

$236

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 3/31

11:19 am-11:19 pm

1 stop12h 00m

Lambert-St Louis

Sun 4/5

11:21 am-10:21 pm

1 stop11h 00m

$236

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Sun 5/3

5:15 am-11:05 am

1 stop5h 50m

Lambert-St Louis

Tue 5/12

8:45 pm-9:50 pm

Nonstop1h 05m

$237

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 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 Chicago to Illinois flight route?

Fly from Chicago Greater Rockford to Chicago O'Hare Intl for the best Chicago - Illinois flight prices

What cabin class options are available on Chicago to Illinois flights?

There are 3 cabin classes available to choose from on Chicago 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 to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Illinois

Best Price Found	$128
Fastest flight time	0h 59m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Chicago in the past 72 hours is $128. The best round-trip flight deal from Chicago to Illinois found on momondo in the last 72 hours is $95.

The fastest flight from Chicago to Illinois takes 0h 59m

Direct flights go from Chicago to Illinois every day.

There are 98 airports in Illinois. From Chicago there are direct flights to Decatur Arpt (DEC), Greater Peoria (PIA), Lambert-St Louis (STL), Moline Quad-City (MLI) and 2 more.

Search flight deals

When did momondo last update prices for flights from Chicago to Illinois?
Prices for flights from Chicago to Illinois were last updated today.
How many operators does momondo search for flights from Chicago to Illinois?
The number of operators available for flights from Chicago to Illinois is 5 as of March 2026.
How old do you have to be to fly from Chicago to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Chicago to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Chicago to Illinois is Airbus A321neo (14.49% of total bookings). The next most popular plane models are Airbus A321 (sharklets) (11.97%), Airbus A320neo (10.79%), and Airbus A321-100/200 (9.90%).

Best airlines flying from Chicago to Illinois

Compare and see reviews for airlines that fly from Chicago to Illinois with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $168	Free Cancellation	Rating 7.1 11,489 reviews		Search American Airlines flights
United Airlines	PriceFrom $179	Free Cancellation	Rating 7.4 9,461 reviews		Search United Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Chicago to Illinois. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Illinois from Chicago which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between Chicago and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Chicago to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.