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$51+ Cheap flights from O'Hare Intl (ORD) to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — ORD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from O'Hare Intl to Illinois

Keep the following information in mind while searching for O'Hare Intl to Illinois flight deals. Data was last updated September 11, 2025.

Round-trip from

$101
(United Airlines)

One-way from

$51
(United Airlines)

Good round-trip deal

$184 or less

Good one-way deal

$133 or less
From Chicago O'Hare Intl to Illinois
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One-way flight from Chicago O'Hare Intl to Illinois
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Price to beat on a round-trip flight from Chicago O'Hare Intl to Illinois.
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Price to beat on a one-way flight from Chicago O'Hare Intl to Illinois.
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Find flight deals from O'Hare Intl to Illinois

Cheapest flights from O'Hare Intl to Illinois
Explore the most affordable flight options available from O'Hare Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/19:25 amORD - STL
Nonstop1h 24mUnited Airlines
Sat 10/48:00 amSTL - ORD
Nonstop1h 30mUnited Airlines
Deal found 9/11$101
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2110:34 pmORD - STL
Nonstop1h 20mAmerican Airlines
Fri 10/246:00 amSTL - ORD
Nonstop1h 23mAmerican Airlines
Deal found 9/10$117
This Contour deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Contour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/811:40 amORD - BRL
Nonstop1h 20mContour
Tue 10/149:40 amBRL - ORD
Nonstop1h 10mContour
Deal found 9/9$118
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/48:00 amORD - STL
Nonstop1h 26mAmerican Airlines
Sun 10/56:05 amSTL - ORD
Nonstop1h 20mAmerican Airlines
Deal found 9/10$118
This American Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/18:31 pmORD - STL
Nonstop1h 22mAmerican Airlines
Thu 10/26:05 amSTL - ORD
Nonstop1h 20mAmerican Airlines
Deal found 9/10$120
This Booking.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2811:40 amORD - BRL
Nonstop1h 20mContour
Fri 1/22:25 pmBRL - ORD
Nonstop1h 20mContour
Deal found 9/11$128
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/211:01 amORD - STL
Nonstop1h 27mUnited Airlines
Sun 10/59:20 amSTL - ORD
Nonstop1h 30mUnited Airlines
Deal found 9/11$133
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:42 amORD - STL
1 stop22h 24mFrontier
Sat 10/47:55 pmSTL - ORD
1 stop13h 42mFrontier
Deal found 9/10$134
This eDestinos deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:20 amORD - STL
1 stop25h 46mFrontier
Thu 10/27:55 pmSTL - ORD
1 stop28h 04mFrontier
Deal found 9/10$139
This Mytrip deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2412:50 pmORD - BRL
Nonstop1h 20mContour
Sun 9/289:40 amBRL - ORD
Nonstop1h 10mContour
Deal found 9/9$143
This KAYAK deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/265:40 pmORD - BRL
Nonstop1h 20mContour
Sat 11/292:25 pmBRL - ORD
Nonstop1h 20mContour
Deal found 9/8$144
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/210:42 amORD - STL
1 stop22h 24mFrontier
Mon 10/64:00 pmSTL - ORD
1 stop7h 39mFrontier
Deal found 9/9$145

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 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

O'Hare Intl

Fly to

Illinois

Route

Depart

Return

Price

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 11/5

2:23 pm-3:49 pm

Nonstop1h 26m

Lambert-St Louis

Sat 11/8

5:24 pm-6:47 pm

Nonstop1h 23m

$101

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 10/1

1:03 pm-2:27 pm

Nonstop1h 24m

Lambert-St Louis

Sat 10/4

5:28 pm-6:53 pm

Nonstop1h 25m

$101

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 10/22

6:53 pm-8:26 pm

Nonstop1h 33m

Lambert-St Louis

Fri 10/24

6:00 am-7:23 am

Nonstop1h 23m

$117

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 10/11

1:03 pm-2:27 pm

Nonstop1h 24m

Lambert-St Louis

Mon 10/13

5:28 pm-6:53 pm

Nonstop1h 25m

$117

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Wed 10/8

11:40 am-1:00 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

Fri 11/14

1:00 pm-2:25 pm

Nonstop1h 25m

Lambert-St Louis

Fri 11/14

6:43 pm-8:13 pm

Nonstop1h 30m

$133

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Wed 9/24

12:50 pm-2:10 pm

Nonstop1h 20m

Burlington

Sun 9/28

9:40 am-10:50 am

Nonstop1h 10m

$143

ChicagoBurlington

ORD - BRL

ORDBRL

Chicago O'Hare Intl

Wed 11/26

5:40 pm-7:00 pm

Nonstop1h 20m

Burlington

Sat 11/29

2:25 pm-3:45 pm

Nonstop1h 20m

$144

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Wed 10/29

7:45 am-8:48 am

Nonstop1h 03m

Decatur Arpt

Sun 11/2

9:44 am-10:55 am

Nonstop1h 11m

$149

ChicagoDecatur

ORD - DEC

ORDDEC

Chicago O'Hare Intl

Fri 9/26

7:45 am-8:51 am

Nonstop1h 06m

Decatur Arpt

Tue 9/30

9:38 am-10:53 am

Nonstop1h 15m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 60 results
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Best time to book a flight from O'Hare Intl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from O'Hare Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to Illinois

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Illinois?

Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Illinois (average of $245). Flying from Chicago O'Hare Intl Airport to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ORD to IL?

Find hourly flight availability from O'Hare Intl to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from Chicago O'Hare Intl Airport to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated September 11, 2025.
See what other customers who have flown with United Airlines, American Airlines, and Contour from Chicago O'Hare Intl Airport to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Contour
7.1
Good
36 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Chicago O'Hare Intl Airport to Illinois?

    Departing from Chicago O'Hare Intl Airport to Illinois will take you 1h 20m. The distance from Chicago O'Hare Intl Airport to Illinois is about 186 mi. Generally, flights for this route are nonstop.

  • What are the most popular routes from Chicago O'Hare Intl Airport to Illinois?

    While some choose either Chicago O'Hare Intl - Decatur Arpt or Chicago O'Hare Intl - Greater Peoria, Chicago O'Hare Intl - Lambert-St Louis is the most popular route from Chicago O'Hare Intl Airport to Illinois.

  • Can I find deals for flights from O'Hare Intl to Illinois that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to Illinois.

  • Can I find deals for business class flights from O'Hare Intl to Illinois?

    Yes. Cheapflights offers flight deals from O'Hare Intl to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Illinois (average of $245). Flying from Chicago O'Hare Intl Airport to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for O'Hare Intl to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from O'Hare Intl to Illinois

Discover the top 2 airlines that operate flights from O'Hare Intl to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$179Average$339FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$179Average$347FlexibilityNo cancel feeOn-time71%

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