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Cheap flights from Chicago O'Hare Intl Airport to Illinois from $49

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Illinois departing on 12/11. 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 Chicago O'Hare Intl Airport to Illinois

Cheap round-trip flights

American Airlines Logo
10:34 pm - 11:54 pmORD-STL
1h 20mnonstop
American Airlines Logo
4:34 pm - 6:02 pmSTL-ORD
1h 28mnonstop
$97American Airlines
Find Deal
Tue, Oct 21 - Mon, Oct 27
American Airlines Logo
6:53 pm - 8:26 pmORD-STL
1h 33mnonstop
American Airlines Logo
6:00 am - 7:23 amSTL-ORD
1h 23mnonstop
$98American Airlines
Find Deal
Thu, Oct 9 - Mon, Oct 13
Southwest Logo
1:30 pm - 8:45 pmORD-STL
7h 15m1 stop
Southwest Logo
2:55 pm - 9:30 pmSTL-ORD
6h 35m1 stop
$117Southwest
Find Deal
Tue, Oct 7 - Wed, Oct 22
Contour Logo
5:40 pm - 7:00 pmORD-BRL
1h 20mnonstop
Contour Logo
9:40 am - 10:50 amBRL-ORD
1h 10mnonstop
$118Contour
Find Deal
Wed, Oct 8 - Tue, Oct 14
Southwest Logo
7:00 am - 12:30 pmORD-STL
5h 30m1 stop
Southwest Logo
1:45 pm - 10:00 pmSTL-ORD
8h 15m2 stops
$122Southwest
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Sat, Oct 25 - Sat, Oct 25
Frontier Logo
7:20 am - 9:06 amORD-STL
25h 46m1 stop
Frontier Logo
4:00 pm - 11:39 pmSTL-ORD
7h 39m1 stop
$125Frontier
Find Deal
Wed, Oct 1 - Thu, Oct 2
Contour Logo
5:40 pm - 7:00 pmORD-BRL
1h 20mnonstop
Contour Logo
9:40 am - 10:50 amBRL-ORD
1h 10mnonstop
$128Contour
Find Deal
Sun, Mar 1 - Tue, Mar 3
Frontier Logo
5:10 am - 3:04 pmORD-STL
9h 54m1 stop
Frontier Logo
4:00 pm - 11:39 pmSTL-ORD
7h 39m1 stop
$143Frontier
Find Deal
Mon, Sep 29 - Thu, Oct 2
United Airlines Logo
8:05 pm - 9:37 pmORD-STL
1h 32mnonstop
United Airlines Logo
5:00 am - 6:30 amSTL-ORD
1h 30mnonstop
$157United Airlines
Find Deal
Mon, Oct 13 - Thu, Oct 16
United Airlines Logo
7:45 am - 8:51 amORD-DEC
1h 06mnonstop
United Airlines Logo
9:38 am - 10:53 amDEC-ORD
1h 15mnonstop
$159United Airlines
Find Deal
Fri, Oct 3 - Mon, Oct 6

Southwest flights from Chicago O'Hare Intl Airport to Illinois

Our best Southwest deals on Chicago O'Hare Intl Airport to Illinois flight tickets
Southwest
Oct 7
ORD1:30 pmChicago O'Hare Intl
7h 15m
1 stop
STL8:45 pmLambert-St Louis
Oct 22
STL2:55 pmLambert-St Louis
6h 35m
1 stop
ORD9:30 pmChicago O'Hare Intl
$117
Find similar
Southwest
Oct 25
ORD7:00 amChicago O'Hare Intl
5h 30m
1 stop
STL12:30 pmLambert-St Louis
Oct 25
STL1:45 pmLambert-St Louis
8h 15m
2 stops
ORD10:00 pmChicago O'Hare Intl
$122
Find similar
Southwest
Oct 7
ORD3:10 pmChicago O'Hare Intl
6h 55m
1 stop
STL10:05 pmLambert-St Louis
Oct 22
STL8:20 amLambert-St Louis
8h 25m
2 stops
ORD4:45 pmChicago O'Hare Intl
$189
Find similar

Delta flights from Chicago O'Hare Intl Airport to Illinois

Our best Delta deals on Chicago O'Hare Intl Airport to Illinois flight tickets
Delta
Oct 15
ORD5:20 amChicago O'Hare Intl
7h 15m
1 stop
STL12:35 pmLambert-St Louis
Oct 15
STL5:15 pmLambert-St Louis
6h 43m
1 stop
ORD11:58 pmChicago O'Hare Intl
$177
Find similar
Delta
Nov 6
ORD5:20 amChicago O'Hare Intl
7h 15m
1 stop
STL12:35 pmLambert-St Louis
Nov 8
STL6:00 amLambert-St Louis
6h 40m
2 stops
ORD12:40 pmChicago O'Hare Intl
$182
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to Illinois 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 September 15, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 10/21

10:34 pm-11:54 pm

Nonstop1h 20m

Lambert-St Louis

Mon 10/27

4:34 pm-6:02 pm

Nonstop1h 28m

$97

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 10/9

6:53 pm-8:26 pm

Nonstop1h 33m

Lambert-St Louis

Mon 10/13

6:00 am-7:23 am

Nonstop1h 23m

$98

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 10/7

1:30 pm-8:45 pm

1 stop7h 15m

Lambert-St Louis

Wed 10/22

2:55 pm-9:30 pm

1 stop6h 35m

$117

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Wed 10/8

5:40 pm-7:00 pm

Nonstop1h 20m

Burlington

Tue 10/14

9:40 am-10:50 am

Nonstop1h 10m

$118

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 10/25

7:00 am-12:30 pm

1 stop5h 30m

Lambert-St Louis

Sat 10/25

1:45 pm-10:00 pm

2 stops8h 15m

$122

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 10/1

7:20 am-9:06 am

1 stop25h 46m

Lambert-St Louis

Thu 10/2

4:00 pm-11:39 pm

1 stop7h 39m

$125

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Sun 3/1

5:40 pm-7:00 pm

Nonstop1h 20m

Burlington

Tue 3/3

9:40 am-10:50 am

Nonstop1h 10m

$128

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Mon 9/29

5:10 am-3:04 pm

1 stop9h 54m

Lambert-St Louis

Thu 10/2

4:00 pm-11:39 pm

1 stop7h 39m

$143

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Mon 10/13

8:05 pm-9:37 pm

Nonstop1h 32m

Lambert-St Louis

Thu 10/16

5:00 am-6:30 am

Nonstop1h 30m

$157

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 10/3

7:45 am-8:51 am

Nonstop1h 06m

Decatur Arpt

Mon 10/6

9:38 am-10:53 am

Nonstop1h 15m

$159

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 Illinois from

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

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

Fly from Chicago O'Hare Intl to Moline Quad-City for the best Chicago O'Hare Intl - Illinois flight prices

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

There are 4 cabin classes available to choose from on Chicago O'Hare Intl 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 O'Hare Intl Airport to Illinois flight deals and tips

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

Best Price Found

$131

Fastest flight time

0h 57m

Direct flights

Every day

Airports in Illinois

9 airports
The best one-way flight to Illinois from Chicago O'Hare Intl Airport in the past 72 hours is $131. The best round-trip flight deal from Chicago O'Hare Intl Airport to Illinois found on momondo in the last 72 hours is $112.
The fastest flight from Chicago O'Hare Intl Airport to Illinois takes 0h 57m
Direct flights go from Chicago O'Hare Intl Airport to Illinois every day.
There are 9 airports near Illinois: Decatur Arpt (DEC), Evansville Dress Regional (EVV), Greater Peoria (PIA), Lambert-St Louis (STL), Moline Quad-City (MLI), Springfield Capital (SPI), Burlington (BRL), Champaign University-Willard (CMI), Bloomington-Normal (BMI)
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  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Illinois?

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

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

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

    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 Chicago O'Hare Intl Airport to Illinois.

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

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

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

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Illinois with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $179Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
American AirlinesPriceFrom $179Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Chicago to Illinois for you.

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

Flights from Chicago to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Illinois from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes momondo offers price alerts on flights to Illinois from Chicago. 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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