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Cheap flights from Illinois to Chicago from $46

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 9/2. 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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Find the cheapest flights from Illinois to Chicago

Cheap round-trip flights

Southwest Logo
11:35 am - 12:40 pmSTL-MDW
1h 05mnonstop
Southwest Logo
5:40 pm - 6:55 pmMDW-STL
1h 15mnonstop
$91Southwest
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Tue, Aug 26 - Wed, Aug 27
American Airlines Logo
9:56 am - 11:20 amSTL-ORD
1h 24mnonstop
American Airlines Logo
8:31 pm - 9:53 pmORD-STL
1h 22mnonstop
$91American Airlines
Find Deal
Tue, Sep 9 - Tue, Sep 30
Contour Logo
9:40 am - 10:50 amBRL-ORD
1h 10mnonstop
Contour Logo
12:50 pm - 2:10 pmORD-BRL
1h 20mnonstop
$104Contour
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Fri, Sep 12 - Mon, Sep 15
United Airlines Logo
6:35 am - 8:05 amSTL-ORD
1h 30mnonstop
United Airlines Logo
2:20 pm - 3:44 pmORD-STL
1h 24mnonstop
$108United Airlines
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Sat, Sep 6 - Mon, Sep 8
Contour Logo
9:40 am - 10:50 amBRL-ORD
1h 10mnonstop
Contour Logo
11:30 am - 12:50 pmORD-BRL
1h 20mnonstop
$118Contour
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Fri, Nov 14 - Sun, Nov 16
United Airlines Logo
5:00 am - 6:30 amSTL-ORD
1h 30mnonstop
United Airlines Logo
1:03 pm - 2:27 pmORD-STL
1h 24mnonstop
$147United Airlines
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Thu, Sep 25 - Sun, Sep 28
Southern / Mokulele Logo
1:00 pm - 4:32 pmSTL-ORD
3h 32m1 stop
Southern / Mokulele Logo
1:10 pm - 4:35 pmORD-STL
3h 25m1 stop
$168Southern / Mokulele
Find Deal
Thu, Aug 28 - Thu, Sep 4
Southern / Mokulele Logo
1:00 pm - 4:19 pmSTL-ORD
3h 19m1 stop
Southern / Mokulele Logo
8:15 am - 12:00 pmORD-STL
3h 45m1 stop
$169Southern / Mokulele
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Thu, Oct 16 - Sun, Oct 19
Delta Logo
3:42 pm - 9:44 pmSTL-MDW
6h 02m1 stop
Delta Logo
6:17 pm - 9:55 pmMDW-STL
3h 38m1 stop
$177Delta
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Tue, Aug 26 - Sat, Aug 30
Delta Logo
5:11 pm - 11:56 pmSTL-ORD
6h 45m1 stop
Delta Logo
7:05 am - 2:37 pmORD-STL
7h 32m1 stop
$177Delta
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Sat, Aug 30 - Sun, Aug 31

American Airlines flights from Illinois to Chicago

Our best American Airlines deals on Illinois to Chicago flight tickets
American Airlines
Sep 9
STL9:56 amLambert-St Louis
1h 24m
ORD11:20 amChicago O'Hare Intl
Sep 30
ORD8:31 pmChicago O'Hare Intl
1h 22m
STL9:53 pmLambert-St Louis
$91
Find similar
American Airlines
Aug 23
STL6:00 amLambert-St Louis
1h 24m
ORD7:24 amChicago O'Hare Intl
Aug 25
ORD10:34 pmChicago O'Hare Intl
1h 17m
STL11:51 pmLambert-St Louis
$94
Find similar
American Airlines
Aug 23
STL6:00 amLambert-St Louis
1h 24m
ORD7:24 amChicago O'Hare Intl
Aug 25
ORD10:34 pmChicago O'Hare Intl
1h 17m
STL11:51 pmLambert-St Louis
$95
Find similar

United Airlines flights from Illinois to Chicago

Our best United Airlines deals on Illinois to Chicago flight tickets
United Airlines
Sep 6
STL6:35 amLambert-St Louis
1h 30m
ORD8:05 amChicago O'Hare Intl
Sep 8
ORD2:20 pmChicago O'Hare Intl
1h 24m
STL3:44 pmLambert-St Louis
$108
Find similar
United Airlines
Sep 25
STL5:00 amLambert-St Louis
1h 30m
ORD6:30 amChicago O'Hare Intl
Sep 28
ORD1:03 pmChicago O'Hare Intl
1h 24m
STL2:27 pmLambert-St Louis
$147
Find similar
United Airlines
Aug 15
DEC9:45 amDecatur Arpt
1h 10m
ORD10:55 amChicago O'Hare Intl
Aug 19
ORD7:50 amChicago O'Hare Intl
1h 06m
DEC8:56 amDecatur Arpt
$149
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momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Chicago 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 August 2, 2025.
Use the filters below to find and compare flights from Illinois to Chicago that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Tue 8/26

11:35 am-12:40 pm

Nonstop1h 05m

Chicago Midway

Wed 8/27

5:40 pm-6:55 pm

Nonstop1h 15m

$91

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Tue 9/9

9:56 am-11:20 am

Nonstop1h 24m

Chicago O'Hare Intl

Tue 9/30

8:31 pm-9:53 pm

Nonstop1h 22m

$91

BurlingtonChicago

BRL - ORD

BRLORD

Burlington

Fri 9/12

9:40 am-10:50 am

Nonstop1h 10m

Chicago O'Hare Intl

Mon 9/15

12:50 pm-2:10 pm

Nonstop1h 20m

$104

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Sat 9/6

6:35 am-8:05 am

Nonstop1h 30m

Chicago O'Hare Intl

Mon 9/8

2:20 pm-3:44 pm

Nonstop1h 24m

$108

BurlingtonChicago

BRL - ORD

BRLORD

Burlington

Fri 11/14

9:40 am-10:50 am

Nonstop1h 10m

Chicago O'Hare Intl

Sun 11/16

11:30 am-12:50 pm

Nonstop1h 20m

$118

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 9/25

5:00 am-6:30 am

Nonstop1h 30m

Chicago O'Hare Intl

Sun 9/28

1:03 pm-2:27 pm

Nonstop1h 24m

$147

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 8/28

1:00 pm-4:32 pm

1 stop3h 32m

Chicago O'Hare Intl

Thu 9/4

1:10 pm-4:35 pm

1 stop3h 25m

$168

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Thu 10/16

1:00 pm-4:19 pm

1 stop3h 19m

Chicago O'Hare Intl

Sun 10/19

8:15 am-12:00 pm

1 stop3h 45m

$169

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Tue 8/26

3:42 pm-9:44 pm

1 stop6h 02m

Chicago Midway

Sat 8/30

6:17 pm-9:55 pm

1 stop3h 38m

$177

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Sat 8/30

5:11 pm-11:56 pm

1 stop6h 45m

Chicago O'Hare Intl

Sun 8/31

7:05 am-2:37 pm

1 stop7h 32m

$177

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

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?

The cheapest day to depart on your flight to Chicago is on a Wednesday when prices can be found for as low as $398. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Chicago for around $561.

What is the cheapest time of day to depart on your flight to Chicago?

Our most recent data shows that the best time of day to fly to Chicago is in the afternoon. Flights from Illinois to Chicago during this time can be as low as $425. In contrast, the most expensive time of day to depart to Chicago is at noon when prices are around $548.

What is the cheapest Illinois to Chicago flight route?

Fly from Champaign University-Willard to Chicago O'Hare Intl for the best Illinois - Chicago flight prices

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

There are 4 cabin classes available to choose from on Illinois to Chicago 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 flight deals and tips

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

Best Price Found

$46

Fastest flight time

1h 05m

Direct flights

Every day

Airports in Chicago

2 airports
The best one-way flight to Chicago from Illinois in the past 72 hours is $46. The best round-trip flight deal from Illinois to Chicago found on momondo in the last 72 hours is $91.
The fastest flight from Illinois to Chicago takes 1h 05m
Direct flights go from Illinois to Chicago every day.
There are 2 airports near Chicago: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)
Search flight deals

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

    Prices for flights from Illinois to Chicago are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Chicago.

  • What documentation or ID do you need to fly to Chicago?

    The travel and health documents you'll need for your trip to Chicago may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Illinois to Chicago?

Best airlines flying from Illinois to Chicago

Compare and see reviews for airlines that fly from Illinois to Chicago with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $179Free CancellationRating
7.4
8,904 reviews
Search United Airlines flights
American AirlinesPriceFrom $179Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Traveling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Merrillville
New Buffalo
Hammond
Benton Harbor
Saint Joseph
Portage
Lansing
Schererville
Valparaiso
Crown Point
Munster
Chesterton
Monticello
Porter
Griffith
Saint John

Why use momondo?

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

It is quick and easy to find Illinois to Chicago flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Chicago that suits you.

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

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

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?

Yes momondo offers price alerts on flights to Chicago from Illinois. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Airports listed have a maximum distance of 78.5 mi from Chicago
Chicago Midway Airport
Chicago O'Hare Intl Airport
Chicago Greater Rockford Airport