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Illinois

$42+ Cheap flights from Ohio 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
CVG — ORD
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap flight deals from Ohio to Illinois

Keep the following information in mind while searching for Ohio to Illinois flight deals. Data was last updated August 14, 2025.

Round-trip from

$91
(American Airlines)

One-way from

$42
(FlightHub)

Popular in

February

Cheapest in

August

Average price

$187

Good round-trip deal

$189 or less

Good one-way deal

$153 or less
From Ohio to Illinois
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One-way flight from Ohio to Illinois
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Highest demand for flights based on searches. 7% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Ohio to Illinois.
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Price to beat on a one-way flight from Ohio to Illinois.
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Find flight deals from Ohio to Illinois

Cheapest flights from Ohio to Illinois
Explore the most affordable flight options available from Ohio to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This FlightHub deal was found by Cheapflights users on 8/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/281:00 pmDTW - STL
Nonstop1h 32mSpirit Airlines
Sun 8/312:30 pmSTL - DTW
Nonstop1h 30mSpirit Airlines
Deal found 8/12$86
This American Airlines deal was found by Cheapflights users on 8/14. 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 9/1012:35 pmPIT - ORD
Nonstop1h 50mAmerican Airlines
Mon 9/156:45 pmORD - PIT
Nonstop1h 46mAmerican Airlines
Deal found 8/14$91
This Southwest deal was found by Cheapflights users on 8/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/45:35 amPIT - MDW
2 stops9h 10mSouthwest
Mon 9/89:30 amMDW - PIT
Nonstop1h 25mSouthwest
Deal found 8/14$92
This American Airlines deal was found by Cheapflights users on 8/14. 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.
Thu 9/410:26 amPIT - ORD
Nonstop1h 46mAmerican Airlines
Mon 9/88:42 amORD - PIT
Nonstop1h 47mAmerican Airlines
Deal found 8/14$92
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/47:45 amDTW - ORD
Nonstop1h 19mDelta
Mon 9/89:10 amORD - DTW
Nonstop1h 20mDelta
Deal found 8/13$92
This Southwest deal was found by Cheapflights users on 8/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/46:05 amDTW - MDW
2 stops8h 40mSouthwest
Mon 9/89:35 amMDW - DTW
Nonstop1h 10mSouthwest
Deal found 8/14$92
This Southwest deal was found by Cheapflights users on 8/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:20 amPIT - MDW
Nonstop1h 30mSouthwest
Sat 10/116:00 amMDW - PIT
1 stop9h 00mSouthwest
Deal found 8/14$93
This Delta deal was found by Cheapflights users on 8/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/46:21 pmDTW - MDW
Nonstop1h 16mDelta
Mon 9/86:17 pmMDW - DTW
Nonstop1h 15mDelta
Deal found 8/14$93
This Southwest deal was found by Cheapflights users on 8/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:50 pmPIT - MDW
1 stop5h 00mSouthwest
Tue 9/1610:05 amMDW - PIT
1 stop6h 50mSouthwest
Deal found 8/14$97
This Southwest deal was found by Cheapflights users on 8/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:00 amPIT - ORD
1 stop6h 50mSouthwest
Sat 9/62:55 pmORD - PIT
1 stop4h 00mSouthwest
Deal found 8/14$97
This Southwest deal was found by Cheapflights users on 8/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/105:50 amDTW - ORD
1 stop7h 00mSouthwest
Wed 9/103:10 pmORD - DTW
1 stop5h 15mSouthwest
Deal found 8/12$97
This Southwest deal was found by Cheapflights users on 8/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/84:15 pmDTW - MDW
1 stop6h 20mSouthwest
Wed 9/107:25 amMDW - DTW
1 stop4h 05mSouthwest
Deal found 8/14$97

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ohio 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 August 14, 2025.
Use the filters below to find and compare flights from Ohio to Illinois that are best for you.

Fly from

Ohio

Fly to

Illinois

Route

Depart

Return

Price

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Sat 10/4

12:35 pm-1:25 pm

Nonstop1h 50m

Chicago O'Hare Intl

Sat 10/11

1:59 pm-4:34 pm

Nonstop1h 35m

$91

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Thu 9/4

5:23 pm-6:10 pm

Nonstop1h 47m

Chicago O'Hare Intl

Sat 9/6

9:00 am-11:44 am

Nonstop1h 44m

$91

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Thu 9/11

12:35 pm-1:25 pm

Nonstop1h 50m

Chicago O'Hare Intl

Mon 9/15

8:42 am-11:29 am

Nonstop1h 47m

$91

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Thu 10/9

6:09 am-6:57 am

Nonstop1h 48m

Chicago O'Hare Intl

Sat 10/11

1:59 pm-4:34 pm

Nonstop1h 35m

$91

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Wed 9/10

10:26 am-11:10 am

Nonstop1h 44m

Chicago O'Hare Intl

Sat 9/13

2:15 pm-4:52 pm

Nonstop1h 37m

$91

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Tue 10/14

7:17 am-7:59 am

Nonstop1h 42m

Chicago O'Hare Intl

Thu 10/16

8:50 pm-11:19 pm

Nonstop1h 29m

$91

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Wed 9/10

5:23 pm-6:10 pm

Nonstop1h 47m

Chicago O'Hare Intl

Wed 9/17

8:42 am-11:29 am

Nonstop1h 47m

$91

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Thu 11/6

4:04 pm-5:04 pm

Nonstop2h 00m

Chicago O'Hare Intl

Sat 11/8

1:40 pm-4:19 pm

Nonstop1h 39m

$91

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Wed 9/3

10:26 am-11:12 am

Nonstop1h 46m

Chicago O'Hare Intl

Sat 9/6

9:00 am-11:44 am

Nonstop1h 44m

$91

PittsburghChicago

PIT - MDW

PITMDW

Pittsburgh

Sat 10/25

12:00 pm-6:35 pm

2 stops7h 35m

Chicago Midway

Wed 10/29

8:45 pm-11:05 pm

Nonstop1h 20m

$92

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 60 results
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Best time to book a flight from Ohio to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Ohio 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 Ohio to Illinois

What is the cheapest month to book a flight from Ohio to Illinois?

Currently, August is the cheapest month in which you can book a flight from Ohio to Illinois (average of $245). Flying from Ohio 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 OH to IL?

Find hourly flight availability from Ohio 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 August 14, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ohio to Illinois as you normally would.

Weekly flight availability from Ohio to Illinois

Explore weekly flight availability from Ohio to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 14, 2025.

The most flights from USOH to USIL are scheduled on a Thursday (71 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (24 on average).

How much does it cost to fly round-trip from Ohio to Illinois?

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 August 14, 2025.
Read through reviews of airlines operating flights from Ohio to Illinois, such as Southwest, United Airlines, and American Airlines. 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.
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Spirit Airlines
6.3
Okay
8,046 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,217 reviews
Southwest
8.0
Very good
4,244 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

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

  • What are the cheapest airlines to fly from Ohio to Illinois one-way?

    To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $42. American Airlines flights start at $46 while deals on Southwest start at $49 one-way.

  • Can I find deals for flights from Ohio to Illinois that include hotel bookings?

    Yes. In addition to deals on Ohio to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ohio to Illinois?

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

  • Can I find deals for business class flights from Ohio to Illinois?

    Yes. Cheapflights offers flight deals from Ohio 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 Ohio to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Ohio to Illinois (average of $245). Flying from Ohio 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 Ohio to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ohio to Illinois

Discover the top 5 airlines that operate flights from Ohio 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$90Average$338FlexibilityNo cancel feeOn-time65%
FrontierCheapest$107Average$177FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$134Average$323FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$139Average$286FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$144Average$298FlexibilityNo cancel feeOn-time63%

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