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

869 flights are operational weekly from Chicago to Illinois as of May 2026. The most popular departure day for this route is Mon, with 19% of flights per week taking off on this day.

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

As of May 2026, there are 124 flights per day flying from Chicago to Illinois. The most common time of day flights depart is 10:00PM, with 38% of flights taking off in the evening.

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

Contour, Southwest, and Delta 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 May 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.

$39 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.

12:15 pm - 1:35 pm

ORD

BRL

1h 20mnonstop

3:45 pm - 5:10 pm

BRL

ORD

1h 25mnonstop

$78Contour

Fri, Jun 5 - Wed, Jun 17

12:15 pm - 1:35 pm

ORD

BRL

1h 20mnonstop

9:10 am - 10:35 am

BRL

ORD

1h 25mnonstop

$79Contour

Thu, Jun 25 - Fri, Jul 3

7:45 am - 8:58 am

ORD

DEC

1h 13mnonstop

9:37 am - 10:45 am

DEC

ORD

1h 08mnonstop

$149United Airlines

Wed, May 20 - Sun, May 24

7:45 am - 8:57 am

ORD

DEC

1h 12mnonstop

9:37 am - 10:45 am

DEC

ORD

1h 08mnonstop

$159United Airlines

Thu, May 21 - Mon, May 25

9:57 am - 11:03 am

ORD

CMI

1h 06mnonstop

6:12 am - 7:30 am

CMI

ORD

1h 18mnonstop

$228American Airlines

Wed, Jun 24 - Sat, Jun 27

5:01 pm - 6:09 pm

ORD

CMI

1h 08mnonstop

6:39 pm - 8:09 pm

CMI

ORD

1h 30mnonstop

$229American Airlines

Wed, May 27 - Sat, May 30

6:00 am - 5:30 pm

MDW

STL

11h 30m

1 stop

5:06 pm - 10:11 pm

STL

MDW

5h 05m

1 stop

$250Frontier

Sun, Jun 14 - Wed, Jun 17

9:10 am - 6:18 pm

ORD

STL

9h 08m

1 stop

7:46 pm - 5:07 am

STL

ORD

9h 21m

1 stop

$250Frontier

Fri, Jun 12 - Tue, Jun 16

5:11 pm - 11:56 pm

MDW

STL

6h 45m

1 stop

11:13 am - 6:18 pm

STL

MDW

7h 05m

1 stop

$257Delta

Fri, Jun 12 - Tue, Jun 16

9:22 am - 1:10 pm

MDW

STL

3h 48m

1 stop

6:21 am - 12:46 pm

STL

MDW

6h 25m

2 stops

$262Delta

Wed, Jun 3 - Wed, Jun 10

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Frontier flights from Chicago to Illinois

Our best Frontier deals on Chicago to Illinois flight tickets

Frontier

Jun 14

MDW6:00 amChicago Midway

11h 30m

1 stop

STL5:30 pmLambert-St Louis

Jun 17

STL5:06 pmLambert-St Louis

5h 05m

1 stop

MDW10:11 pmChicago Midway

$250

Frontier

Jun 3

MDW12:04 pmChicago Midway

11h 53m

2 stops

STL11:57 pmLambert-St Louis

Jun 10

STL7:04 pmLambert-St Louis

20h 11m

1 stop

MDW3:15 pmChicago Midway

$251

Frontier

Jun 11

MDW6:00 amChicago Midway

26h 52m

1 stop

STL8:52 amLambert-St Louis

Jun 14

STL6:31 pmLambert-St Louis

16h 38m

1 stop

MDW11:09 amChicago Midway

$252

Delta flights from Chicago to Illinois

Our best Delta deals on Chicago to Illinois flight tickets

Delta

Jun 12

MDW5:11 pmChicago Midway

6h 45m

1 stop

STL11:56 pmLambert-St Louis

Jun 16

STL11:13 amLambert-St Louis

7h 05m

1 stop

MDW6:18 pmChicago Midway

$257

Delta

Jun 3

MDW9:22 amChicago Midway

3h 48m

1 stop

STL1:10 pmLambert-St Louis

Jun 10

STL6:21 amLambert-St Louis

6h 25m

2 stops

MDW12:46 pmChicago Midway

$262

Delta

Jun 3

ORD2:00 pmChicago O'Hare Intl

9h 21m

2 stops

STL11:21 pmLambert-St Louis

Jun 10

STL11:13 amLambert-St Louis

9h 18m

2 stops

ORD8:31 pmChicago O'Hare Intl

$267

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Fri 6/5

12:15 pm-1:35 pm

Nonstop1h 20m

Burlington

Wed 6/17

3:45 pm-5:10 pm

Nonstop1h 25m

$78

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Thu 6/25

12:15 pm-1:35 pm

Nonstop1h 20m

Burlington

Fri 7/3

9:10 am-10:35 am

Nonstop1h 25m

$79

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Wed 5/20

7:45 am-8:58 am

Nonstop1h 13m

Decatur Arpt

Sun 5/24

9:37 am-10:45 am

Nonstop1h 08m

$149

Quickest round-trip

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Thu 5/21

7:45 am-8:57 am

Nonstop1h 12m

Decatur Arpt

Mon 5/25

9:37 am-10:45 am

Nonstop1h 08m

$159

ChicagoChampaign

ORD - CMI

ORDCMI

Chicago O'Hare Intl

Wed 6/24

9:57 am-11:03 am

Nonstop1h 06m

Champaign University-Willard

Sat 6/27

6:12 am-7:30 am

Nonstop1h 18m

$228

ChicagoChampaign

ORD - CMI

ORDCMI

Chicago O'Hare Intl

Wed 5/27

5:01 pm-6:09 pm

Nonstop1h 08m

Champaign University-Willard

Sat 5/30

6:39 pm-8:09 pm

Nonstop1h 30m

$229

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Sun 6/14

6:00 am-5:30 pm

1 stop11h 30m

Lambert-St Louis

Wed 6/17

5:06 pm-10:11 pm

1 stop5h 05m

$250

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 6/12

9:10 am-6:18 pm

1 stop9h 08m

Lambert-St Louis

Tue 6/16

7:46 pm-5:07 am

1 stop9h 21m

$250

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Fri 6/12

5:11 pm-11:56 pm

1 stop6h 45m

Lambert-St Louis

Tue 6/16

11:13 am-6:18 pm

1 stop7h 05m

$257

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 6/3

9:22 am-1:10 pm

1 stop3h 48m

Lambert-St Louis

Wed 6/10

6:21 am-12:46 pm

2 stops6h 25m

$262

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 month to fly to Illinois?

The cheapest month to fly to Illinois from Chicago is in April. Flight prices, which tend to average around $105, 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 December is also cheap. Prices for this month can be found on momondo for an average of $108.

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

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	0h 57m
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 $136.

The fastest flight from Chicago to Illinois takes 0h 57m

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), Evansville Dress Regional (EVV), Greater Peoria (PIA), Lambert-St Louis (STL) and 3 more.

Search flight deals

Frequently asked questions about flying 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 May 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 (13.17% of total bookings). The next most popular plane models are Airbus A320neo (10.60%), Airbus A321-100/200 (9.36%), and Airbus A321 (sharklets) (9.11%).

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 11,669 reviews		Search American Airlines flights
United Airlines	PriceFrom $179	Free Cancellation	Rating 7.4 9,690 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.