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Cheap flights from Illinois to Chicago from $41

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Chicago departing on 5/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Chicago

Cheap round-trip flights

Enter your travel dates to find the best prices.
Contour Logo
4:40 pm - 6:05 pm
BRL
-
ORD
1h 25mnonstop
Contour Logo
6:45 pm - 8:05 pm
ORD
-
BRL
1h 20mnonstop
$75Contour
Mon, May 18 - Fri, May 22
Contour Logo
4:40 pm - 6:05 pm
BRL
-
ORD
1h 25mnonstop
Contour Logo
12:00 pm - 1:20 pm
ORD
-
BRL
1h 20mnonstop
$77Contour
Wed, May 6 - Sun, May 10
United Airlines Logo
7:25 pm - 8:38 pm
DEC
-
ORD
1h 13mnonstop
United Airlines Logo
4:45 pm - 5:56 pm
ORD
-
DEC
1h 11mnonstop
$149United Airlines
Wed, May 20 - Wed, May 27
United Airlines Logo
9:42 am - 10:55 am
DEC
-
ORD
1h 13mnonstop
United Airlines Logo
7:45 am - 8:58 am
ORD
-
DEC
1h 13mnonstop
$159United Airlines
Wed, May 6 - Sun, May 10
Frontier Logo
4:19 pm - 11:13 pm
STL
-
ORD
6h 54m
1 stop
Frontier Logo
6:55 am - 5:33 pm
ORD
-
STL
10h 38m
1 stop
$180Frontier
Fri, May 8 - Tue, May 12
Frontier Logo
4:19 pm - 11:13 pm
STL
-
ORD
6h 54m
1 stop
Frontier Logo
5:30 pm - 12:21 am
ORD
-
STL
6h 51m
1 stop
$181Frontier
Thu, May 14 - Mon, May 18
American Airlines Logo
5:21 pm - 6:55 pm
STL
-
ORD
1h 34mnonstop
American Airlines Logo
10:40 pm - 11:56 pm
ORD
-
STL
1h 16mnonstop
$191American Airlines
Sat, May 16 - Mon, May 18
American Airlines Logo
8:03 pm - 9:40 pm
STL
-
ORD
1h 37mnonstop
American Airlines Logo
10:40 pm - 11:56 pm
ORD
-
STL
1h 16mnonstop
$192American Airlines
Sat, May 16 - Mon, May 18
Multiple Airlines Logo
8:44 pm - 11:13 pm
EVV
-
ORD
26h 29m
1 stop
Multiple Airlines Logo
5:11 pm - 3:49 pm
ORD
-
EVV
22h 38m
1 stop
$273Multiple Airlines
Fri, May 22 - Fri, May 29
Multiple Airlines Logo
8:44 pm - 7:55 am
EVV
-
ORD
35h 11m
2 stops
Multiple Airlines Logo
5:11 pm - 3:49 pm
ORD
-
EVV
22h 38m
1 stop
$299Multiple Airlines
Fri, May 22 - Fri, May 29

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American Airlines flights from Illinois to Chicago O'Hare Intl Airport

Our best American Airlines deals on Illinois to Chicago O'Hare Intl Airport flight tickets
American Airlines
May 16
STL5:21 pmLambert-St Louis
1h 34m
ORD6:55 pmChicago O'Hare Intl
May 18
ORD10:40 pmChicago O'Hare Intl
1h 16m
STL11:56 pmLambert-St Louis
$191
American Airlines
May 20
STL9:10 amLambert-St Louis
5h 10m
1 stop
ORD2:20 pmChicago O'Hare Intl
May 27
ORD7:04 pmChicago O'Hare Intl
1h 26m
STL8:30 pmLambert-St Louis
$209
American Airlines
May 20
STL7:05 amLambert-St Louis
1h 31m
ORD8:36 amChicago O'Hare Intl
May 27
ORD12:40 pmChicago O'Hare Intl
1h 26m
STL2:06 pmLambert-St Louis
$213

Southwest flights from Illinois to Chicago O'Hare Intl Airport

Our best Southwest deals on Illinois to Chicago O'Hare Intl Airport flight tickets
Southwest
May 30
STL10:55 amLambert-St Louis
4h 35m
1 stop
ORD3:30 pmChicago O'Hare Intl
Jun 1
ORD2:40 pmChicago O'Hare Intl
6h 15m
1 stop
STL8:55 pmLambert-St Louis
$211
Southwest
May 20
STL7:35 amLambert-St Louis
5h 15m
1 stop
ORD12:50 pmChicago O'Hare Intl
May 27
ORD11:55 amChicago O'Hare Intl
6h 00m
1 stop
STL5:55 pmLambert-St Louis
$233
Southwest
May 20
STL5:45 amLambert-St Louis
5h 25m
1 stop
ORD11:10 amChicago O'Hare Intl
May 27
ORD11:55 amChicago O'Hare Intl
10h 05m
2 stops
STL10:00 pmLambert-St Louis
$238

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Chicago O'Hare Intl Airport 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 April 25, 2026.
Use the filters below to find and compare flights from Illinois to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BurlingtonChicago

BRL - ORD

BRLORD

Burlington

Mon 5/18

4:40 pm-6:05 pm

Nonstop1h 25m

Chicago O'Hare Intl

Fri 5/22

6:45 pm-8:05 pm

Nonstop1h 20m

$75

BurlingtonChicago

BRL - ORD

BRLORD

Burlington

Wed 5/6

4:40 pm-6:05 pm

Nonstop1h 25m

Chicago O'Hare Intl

Sun 5/10

12:00 pm-1:20 pm

Nonstop1h 20m

$77
Quickest round-trip

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Wed 5/20

7:25 pm-8:38 pm

Nonstop1h 13m

Chicago O'Hare Intl

Wed 5/27

4:45 pm-5:56 pm

Nonstop1h 11m

$149

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Wed 5/6

9:42 am-10:55 am

Nonstop1h 13m

Chicago O'Hare Intl

Sun 5/10

7:45 am-8:58 am

Nonstop1h 13m

$159

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Fri 5/8

4:19 pm-11:13 pm

1 stop6h 54m

Chicago O'Hare Intl

Tue 5/12

6:55 am-5:33 pm

1 stop10h 38m

$180

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 5/14

4:19 pm-11:13 pm

1 stop6h 54m

Chicago O'Hare Intl

Mon 5/18

5:30 pm-12:21 am

1 stop6h 51m

$181

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Sat 5/16

5:21 pm-6:55 pm

Nonstop1h 34m

Chicago O'Hare Intl

Mon 5/18

10:40 pm-11:56 pm

Nonstop1h 16m

$191

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Sat 5/16

8:03 pm-9:40 pm

Nonstop1h 37m

Chicago O'Hare Intl

Mon 5/18

10:40 pm-11:56 pm

Nonstop1h 16m

$192

EvansvilleChicago

EVV - ORD

EVVORD

Evansville Dress Regional

Fri 5/22

8:44 pm-11:13 pm

1 stop26h 29m

Chicago O'Hare Intl

Fri 5/29

5:11 pm-3:49 pm

1 stop22h 38m

$273

EvansvilleChicago

EVV - ORD

EVVORD

Evansville Dress Regional

Fri 5/22

8:44 pm-7:55 am

2 stops35h 11m

Chicago O'Hare Intl

Fri 5/29

5:11 pm-3:49 pm

1 stop22h 38m

$299

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 Chicago from

How to get the cheapest flight ticket from Illinois to Chicago O'Hare Intl Airport

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 day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Saturday when prices can be found for as low as $387. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Illinois because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $593.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Flying to Chicago O'Hare Intl Airport from Illinois in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $407 when looking at flights departing in the afternoon. Try not to purchase tickets in the evening because they tend to be around $487. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Illinois to Chicago O'Hare Intl flight route?

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

What cabin class options are available on Illinois to Chicago O'Hare Intl Airport flights?

There are 4 cabin classes available to choose from on Illinois to Chicago O'Hare Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Illinois to Chicago O'Hare Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Chicago O'Hare Intl Airport

Best Price Found

$71

Fastest flight time

0h 50m

Direct flights

Every day
The best one-way flight to Chicago O'Hare Intl Airport from Illinois in the past 72 hours is $71. The best round-trip flight deal from Illinois to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $198.
The fastest flight from Illinois to Chicago O'Hare Intl Airport takes 0h 50m
Direct flights go from Illinois to Chicago O'Hare Intl Airport every day.
Search flight deals

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

  • When did momondo last update prices for flights from Illinois to Chicago O'Hare Intl Airport?

    Prices for flights from Illinois to Chicago O'Hare Intl Airport refresh daily.

  • How many operators does momondo search for flights from Illinois to Chicago O'Hare Intl Airport?

  • How old do you have to be to fly from Illinois to Chicago O'Hare Intl Airport?

    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 Illinois to Chicago O'Hare Intl Airport.

  • What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

    The travel and health documents required for your trip to Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport. 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 Illinois to Chicago O'Hare Intl Airport?

Best airlines flying from Illinois to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Illinois to Chicago O'Hare Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $179Free CancellationRating
7.4
9,650 reviews
Search United Airlines flights
American AirlinesPriceFrom $179Free CancellationRating
7.1
11,672 reviews
Search American Airlines flights

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Lake Geneva
Schaumburg
South Haven
Rockford
Merrillville
Gurnee
Rosemont
Naperville
New Buffalo
Orland Park
Oak Brook
Kenosha
Joliet
Aurora
Janesville
Racine
Hammond
Tinley Park
Elgin
Evanston

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Chicago from Illinois.

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

Yes. momondo allows you to filter the results for Illinois to Chicago flights to just show those with flexible booking policies.

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

Once all potential Illinois to Chicago flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Chicago, momondo offers a useful price alert feature which will track prices for flights to Chicago from Illinois and alert you when they change.

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