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Cheap flights from Illinois to Chicago from $43

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 2/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Contour Logo
9:00 am - 10:10 am
BRL
-
ORD
1h 10mnonstop
Contour Logo
6:25 pm - 7:45 pm
ORD
-
BRL
1h 20mnonstop
$85Contour
Wed, Feb 4 - Sun, Feb 8
Contour Logo
5:30 pm - 6:50 pm
UIN
-
ORD
1h 20mnonstop
Contour Logo
2:40 pm - 4:00 pm
ORD
-
UIN
1h 20mnonstop
$86Contour
Wed, Feb 4 - Sun, Feb 8
Frontier Logo
8:17 pm - 10:51 am
STL
-
ORD
14h 34m
1 stop
Frontier Logo
4:42 pm - 6:51 am
ORD
-
STL
14h 09m
1 stop
$133Frontier
Wed, Feb 25 - Thu, Feb 26
Frontier Logo
8:22 pm - 10:51 am
STL
-
ORD
14h 29m
1 stop
Frontier Logo
6:02 pm - 6:51 am
ORD
-
STL
12h 49m
1 stop
$146Frontier
Fri, Feb 27 - Tue, Mar 3
United Airlines Logo
7:09 pm - 8:25 pm
DEC
-
ORD
1h 16mnonstop
United Airlines Logo
4:50 pm - 5:54 pm
ORD
-
DEC
1h 04mnonstop
$149United Airlines
Mon, Feb 9 - Sun, Feb 15
United Airlines Logo
7:09 pm - 8:25 pm
DEC
-
ORD
1h 16mnonstop
United Airlines Logo
7:45 am - 9:05 am
ORD
-
DEC
1h 20mnonstop
$159United Airlines
Fri, Feb 6 - Sun, Feb 8
Multiple Airlines Logo
8:17 pm - 10:39 pm
STL
-
ORD
26h 22m
1 stop
Multiple Airlines Logo
8:16 pm - 6:51 am
ORD
-
STL
34h 35m
2 stops
$168Multiple Airlines
Wed, Feb 18 - Wed, Feb 25
Multiple Airlines Logo
4:51 pm - 7:54 am
STL
-
ORD
15h 03m
2 stops
Multiple Airlines Logo
4:42 pm - 6:51 am
ORD
-
STL
14h 09m
1 stop
$170Multiple Airlines
Wed, Feb 25 - Thu, Feb 26
American Airlines Logo
1:30 pm - 2:40 pm
PIA
-
ORD
1h 10mnonstop
American Airlines Logo
5:13 pm - 6:22 pm
ORD
-
PIA
1h 09mnonstop
$179American Airlines
Wed, Apr 8 - Sat, May 23
American Airlines Logo
5:16 pm - 6:33 pm
PIA
-
ORD
1h 17mnonstop
American Airlines Logo
5:24 pm - 6:25 pm
ORD
-
PIA
1h 01mnonstop
$194American Airlines
Mon, Feb 9 - Thu, Feb 26

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

Our best United Airlines deals on Illinois to Chicago O'Hare Intl Airport flight tickets
United Airlines
Feb 9
DEC7:09 pmDecatur Arpt
1h 16m
ORD8:25 pmChicago O'Hare Intl
Feb 15
ORD4:50 pmChicago O'Hare Intl
1h 04m
DEC5:54 pmDecatur Arpt
$149
United Airlines
Feb 5
DEC9:49 amDecatur Arpt
1h 16m
ORD11:05 amChicago O'Hare Intl
Feb 9
ORD7:45 amChicago O'Hare Intl
1h 20m
DEC9:05 amDecatur Arpt
$159
United Airlines
Feb 21
DEC7:15 pmDecatur Arpt
1h 10m
ORD8:25 pmChicago O'Hare Intl
Feb 22
ORD7:45 amChicago O'Hare Intl
1h 07m
DEC8:52 amDecatur Arpt
$160

Contour flights from Illinois to Chicago O'Hare Intl Airport

Our best Contour deals on Illinois to Chicago O'Hare Intl Airport flight tickets
Contour
Feb 4
BRL9:00 amBurlington
1h 10m
ORD10:10 amChicago O'Hare Intl
Feb 8
ORD6:25 pmChicago O'Hare Intl
1h 20m
BRL7:45 pmBurlington
$85
Contour
Feb 4
UIN5:30 pmQuincy Regional
1h 20m
ORD6:50 pmChicago O'Hare Intl
Feb 8
ORD2:40 pmChicago O'Hare Intl
1h 20m
UIN4:00 pmQuincy Regional
$86
Contour
Jan 23
UIN9:50 amQuincy Regional
1h 20m
ORD11:10 amChicago O'Hare Intl
Jan 25
ORD2:40 pmChicago O'Hare Intl
1h 20m
UIN4:00 pmQuincy Regional
$89

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 January 22, 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

BurlingtonChicago

BRL - ORD

BRLORD

Burlington

Wed 2/4

9:00 am-10:10 am

Nonstop1h 10m

Chicago O'Hare Intl

Sun 2/8

6:25 pm-7:45 pm

Nonstop1h 20m

$85

QuincyChicago

UIN - ORD

UINORD

Quincy Regional

Wed 2/4

5:30 pm-6:50 pm

Nonstop1h 20m

Chicago O'Hare Intl

Sun 2/8

2:40 pm-4:00 pm

Nonstop1h 20m

$86

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Wed 2/25

8:17 pm-10:51 am

1 stop14h 34m

Chicago O'Hare Intl

Thu 2/26

4:42 pm-6:51 am

1 stop14h 09m

$133

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Fri 2/27

8:22 pm-10:51 am

1 stop14h 29m

Chicago O'Hare Intl

Tue 3/3

6:02 pm-6:51 am

1 stop12h 49m

$146

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Mon 2/9

7:09 pm-8:25 pm

Nonstop1h 16m

Chicago O'Hare Intl

Sun 2/15

4:50 pm-5:54 pm

Nonstop1h 04m

$149

DecaturChicago

DEC - ORD

DECORD

Decatur Arpt

Fri 2/6

7:09 pm-8:25 pm

Nonstop1h 16m

Chicago O'Hare Intl

Sun 2/8

7:45 am-9:05 am

Nonstop1h 20m

$159

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Wed 2/18

8:17 pm-10:39 pm

1 stop26h 22m

Chicago O'Hare Intl

Wed 2/25

8:16 pm-6:51 am

2 stops34h 35m

$168

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Wed 2/25

4:51 pm-7:54 am

2 stops15h 03m

Chicago O'Hare Intl

Thu 2/26

4:42 pm-6:51 am

1 stop14h 09m

$170

PeoriaChicago

PIA - ORD

PIAORD

Greater Peoria

Wed 4/8

1:30 pm-2:40 pm

Nonstop1h 10m

Chicago O'Hare Intl

Sat 5/23

5:13 pm-6:22 pm

Nonstop1h 09m

$179

PeoriaChicago

PIA - ORD

PIAORD

Greater Peoria

Mon 2/9

5:16 pm-6:33 pm

Nonstop1h 17m

Chicago O'Hare Intl

Thu 2/26

5:24 pm-6:25 pm

Nonstop1h 01m

$194

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 Wednesday when prices can be found for as low as $385. 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 $556.

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 evening is the least expensive time of day to depart. momondo users have found prices as low as $339 when looking at flights departing in the evening. Try not to purchase tickets at noon because they tend to be around $431. 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 flights?

There are 4 cabin classes available to choose from on Illinois to Chicago O'Hare Intl 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

$119

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 $119. The best round-trip flight deal from Illinois to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $235.
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

  • 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
9,190 reviews
Search United Airlines flights
American AirlinesPriceFrom $179Free CancellationRating
7.2
11,174 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
Naperville
Rosemont
New Buffalo
Kenosha
Joliet
Oak Brook
Orland Park
Racine
Hammond
Janesville
Tinley Park
Elgin
Aurora
South Holland

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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