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

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

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

As of January 2026, there are 93 flights per day flying from Chicago to Illinois. The most common time of day flights depart is 3:00PM, with 39% of flights taking off in the evening.

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

656 flights are operational weekly from Chicago to Illinois as of January 2026. The most popular departure day for this route is Wed, with 16% of flights per week taking off on this day.

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 January 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.

$64 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.

10:50 am - 12:10 pm

ORD

BRL

1h 20mnonstop

9:00 am - 10:10 am

BRL

ORD

1h 10mnonstop

$85Contour

Thu, Feb 5 - Mon, Feb 9

10:50 am - 12:10 pm

ORD

BRL

1h 20mnonstop

4:25 pm - 5:45 pm

BRL

ORD

1h 20mnonstop

$89Contour

Fri, Feb 6 - Mon, Feb 9

6:02 pm - 6:51 am

ORD

STL

12h 49m

1 stop

10:11 pm - 5:26 pm

STL

ORD

19h 15m

1 stop

$129Frontier

Tue, Feb 24 - Thu, Feb 26

12:53 pm - 1:56 pm

ORD

STL

25h 03m

1 stop

8:22 pm - 10:51 am

STL

ORD

14h 29m

1 stop

$145Frontier

Fri, Feb 20 - Fri, Feb 27

7:45 am - 9:05 am

ORD

DEC

1h 20mnonstop

7:09 pm - 8:25 pm

DEC

ORD

1h 16mnonstop

$149United Airlines

Thu, Feb 5 - Sun, Feb 8

6:02 pm - 6:51 am

ORD

STL

12h 49m

1 stop

3:49 pm - 7:47 pm

STL

ORD

27h 58m

1 stop

$155Multiple Airlines

Tue, Feb 17 - Tue, Feb 24

7:45 am - 9:05 am

ORD

DEC

1h 20mnonstop

7:09 pm - 8:25 pm

DEC

ORD

1h 16mnonstop

$159United Airlines

Thu, Feb 5 - Mon, Feb 9

8:10 am - 6:51 am

ORD

STL

22h 41m

1 stop

8:22 pm - 11:22 am

STL

ORD

15h 00m

2 stops

$167Multiple Airlines

Tue, Feb 3 - Wed, Feb 4

11:58 am - 1:00 pm

ORD

MLI

1h 02mnonstop

1:30 pm - 2:44 pm

MLI

ORD

1h 14mnonstop

$179American Airlines

Fri, Feb 20 - Mon, Feb 23

8:19 am - 9:20 am

ORD

PIA

1h 01mnonstop

7:00 pm - 8:10 pm

PIA

ORD

1h 10mnonstop

$179American Airlines

Fri, Feb 27 - Sun, Mar 1

Frontier flights from Chicago to Illinois

Our best Frontier deals on Chicago to Illinois flight tickets

Frontier

Feb 20

ORD12:53 pmChicago O'Hare Intl

25h 03m

1 stop

STL1:56 pmLambert-St Louis

Feb 27

STL8:22 pmLambert-St Louis

14h 29m

1 stop

ORD10:51 amChicago O'Hare Intl

$145

Frontier

Feb 6

ORD5:40 amChicago O'Hare Intl

25h 11m

1 stop

STL6:51 amLambert-St Louis

Feb 10

STL3:49 pmLambert-St Louis

24h 03m

1 stop

ORD3:52 pmChicago O'Hare Intl

$151

Frontier

Feb 5

ORD2:42 pmChicago O'Hare Intl

16h 09m

1 stop

STL6:51 amLambert-St Louis

Feb 9

STL8:22 pmLambert-St Louis

14h 29m

1 stop

ORD10:51 amChicago O'Hare Intl

$152

Southwest flights from Chicago to Illinois

Our best Southwest deals on Chicago to Illinois flight tickets

Southwest

Feb 18

MDW6:10 amChicago Midway

1h 25m

STL7:35 amLambert-St Louis

Feb 18

STL5:55 pmLambert-St Louis

1h 10m

MDW7:05 pmChicago Midway

$250

Southwest

Feb 24

MDW9:55 amChicago Midway

1h 20m

STL11:15 amLambert-St Louis

Feb 26

STL3:10 pmLambert-St Louis

1h 05m

MDW4:15 pmChicago Midway

$252

Southwest

Feb 18

MDW6:10 amChicago Midway

1h 25m

STL7:35 amLambert-St Louis

Feb 25

STL6:20 amLambert-St Louis

6h 15m

1 stop

MDW12:35 pmChicago Midway

$255

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Thu 2/5

10:50 am-12:10 pm

Nonstop1h 20m

Burlington

Mon 2/9

9:00 am-10:10 am

Nonstop1h 10m

$85

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Fri 2/6

10:50 am-12:10 pm

Nonstop1h 20m

Burlington

Mon 2/9

4:25 pm-5:45 pm

Nonstop1h 20m

$89

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 2/24

6:02 pm-6:51 am

1 stop12h 49m

Lambert-St Louis

Thu 2/26

10:11 pm-5:26 pm

1 stop19h 15m

$129

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 2/20

12:53 pm-1:56 pm

1 stop25h 03m

Lambert-St Louis

Fri 2/27

8:22 pm-10:51 am

1 stop14h 29m

$145

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Thu 2/5

7:45 am-9:05 am

Nonstop1h 20m

Decatur Arpt

Sun 2/8

7:09 pm-8:25 pm

Nonstop1h 16m

$149

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 2/17

6:02 pm-6:51 am

1 stop12h 49m

Lambert-St Louis

Tue 2/24

3:49 pm-7:47 pm

1 stop27h 58m

$155

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Thu 2/5

7:45 am-9:05 am

Nonstop1h 20m

Decatur Arpt

Mon 2/9

7:09 pm-8:25 pm

Nonstop1h 16m

$159

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 2/3

8:10 am-6:51 am

1 stop22h 41m

Lambert-St Louis

Wed 2/4

8:22 pm-11:22 am

2 stops15h 00m

$167

ChicagoMoline

ORD - MLI

ORDMLI

Chicago O'Hare Intl

Fri 2/20

11:58 am-1:00 pm

Nonstop1h 02m

Moline Quad-City

Mon 2/23

1:30 pm-2:44 pm

Nonstop1h 14m

$179

ChicagoPeoria

ORD - PIA

ORDPIA

Chicago O'Hare Intl

Fri 2/27

8:19 am-9:20 am

Nonstop1h 01m

Greater Peoria

Sun 3/1

7:00 pm-8:10 pm

Nonstop1h 10m

$179

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 4 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	$54
Fastest flight time	1h 00m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Chicago in the past 72 hours is $54. The best round-trip flight deal from Chicago to Illinois found on momondo in the last 72 hours is $128.

The fastest flight from Chicago to Illinois takes 1h 00m

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 January 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 (19.39% of total bookings). The next most popular plane models are Airbus A320neo (12.05%), Airbus A321 (sharklets) (9.85%), and Airbus A320-100/200 (7.86%).

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
United Airlines	PriceFrom $179	Free Cancellation	Rating 7.4 9,195 reviews		Search United Airlines flights
American Airlines	PriceFrom $363	Free Cancellation	Rating 7.2 11,176 reviews		Search American 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.