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Illinois

$28+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
CVG — ORD
Aug 6 — Aug 131
Wed 8/6
Wed 8/13
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 1, 2025.

Round-trip from

$64
(Trip.com)

One-way from

$28
(Booking.com)

Popular in

February

Cheapest in

August

Average price

$199

Good round-trip deal

$189 or less

Good one-way deal

$124 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 ($22 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 1, 2025.

This Trip.com deal was found by Cheapflights users on 7/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2110:12 amDTW - STL
Nonstop1h 38mSpirit Airlines
Thu 9/2512:05 pmSTL - DTW
Nonstop1h 30mSpirit Airlines
Deal found 7/30$64
This American Airlines deal was found by Cheapflights users on 7/31. 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 8/238:23 amPIT - ORD
Nonstop1h 54mAmerican Airlines
Mon 8/251:54 pmORD - PIT
Nonstop1h 39mAmerican Airlines
Deal found 7/31$94
This Delta deal was found by Cheapflights users on 7/31. 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 10/239:00 amDTW - ORD
Nonstop1h 23mDelta
Mon 10/2710:30 amORD - DTW
Nonstop1h 23mDelta
Deal found 7/31$97
This Southwest deal was found by Cheapflights users on 7/31. 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 10/26:45 amDTW - MDW
Nonstop1h 10mSouthwest
Thu 10/29:40 amMDW - DTW
Nonstop1h 05mSouthwest
Deal found 7/31$97
This Southwest deal was found by Cheapflights users on 7/30. 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 8/275:50 amDTW - ORD
1 stop7h 00mSouthwest
Wed 9/33:10 pmORD - DTW
1 stop5h 15mSouthwest
Deal found 7/30$111
This Southwest deal was found by Cheapflights users on 7/31. 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 9/258:15 pmDTW - STL
Nonstop1h 35mSouthwest
Sun 9/2811:15 amSTL - DTW
Nonstop1h 30mSouthwest
Deal found 7/31$119
This American Airlines deal was found by Cheapflights users on 7/30. 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 8/273:12 pmDTW - ORD
Nonstop1h 31mAmerican Airlines
Fri 8/296:45 amORD - DTW
Nonstop1h 27mAmerican Airlines
Deal found 7/30$120
This American Airlines deal was found by Cheapflights users on 7/30. 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 9/136:50 amCMH - ORD
Nonstop1h 29mAmerican Airlines
Sat 9/209:06 pmORD - CMH
Nonstop1h 20mAmerican Airlines
Deal found 7/30$129
This Delta deal was found by Cheapflights users on 7/31. 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 8/286:25 pmDTW - STL
Nonstop1h 36mDelta
Thu 9/46:40 amSTL - DTW
Nonstop1h 33mDelta
Deal found 7/31$129
This United Airlines deal was found by Cheapflights users on 7/31. 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.
Fri 8/292:10 pmPIT - ORD
Nonstop1h 44mUnited Airlines
Mon 9/17:24 amORD - PIT
Nonstop1h 37mUnited Airlines
Deal found 7/31$134
This Southwest deal was found by Cheapflights users on 7/30. 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 8/277:35 pmCMH - MDW
1 stop3h 50mSouthwest
Wed 9/36:10 pmMDW - CMH
Nonstop1h 20mSouthwest
Deal found 7/30$137
This American Airlines deal was found by Cheapflights users on 7/30. 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 8/232:11 pmCLE - ORD
Nonstop1h 38mAmerican Airlines
Sun 8/247:09 amORD - CLE
Nonstop1h 30mAmerican Airlines
Deal found 7/30$138

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 1, 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

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Sun 9/21

10:12 am-10:50 am

Nonstop1h 38m

Lambert-St Louis

Thu 9/25

12:05 pm-2:35 pm

Nonstop1h 30m

$64

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Sat 8/23

8:23 am-9:17 am

Nonstop1h 54m

Chicago O'Hare Intl

Mon 8/25

1:54 pm-4:33 pm

Nonstop1h 39m

$94

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Thu 10/23

9:00 am-9:23 am

Nonstop1h 23m

Chicago O'Hare Intl

Mon 10/27

10:30 am-12:53 pm

Nonstop1h 23m

$97

DetroitChicago

DTW - MDW

DTWMDW

Detroit Metropolitan Wayne County

Thu 10/2

6:45 am-6:55 am

Nonstop1h 10m

Chicago Midway

Thu 10/2

9:40 am-11:45 am

Nonstop1h 05m

$97

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Wed 8/27

5:50 am-11:50 am

1 stop7h 00m

Chicago O'Hare Intl

Wed 9/3

3:10 pm-9:25 pm

1 stop5h 15m

$111

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 9/25

8:15 pm-8:50 pm

Nonstop1h 35m

Lambert-St Louis

Sun 9/28

11:15 am-1:45 pm

Nonstop1h 30m

$119

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Wed 8/27

3:12 pm-3:43 pm

Nonstop1h 31m

Chicago O'Hare Intl

Fri 8/29

6:45 am-9:12 am

Nonstop1h 27m

$120

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 8/28

6:25 pm-7:01 pm

Nonstop1h 36m

Lambert-St Louis

Thu 9/4

6:40 am-9:13 am

Nonstop1h 33m

$129

ColumbusChicago

CMH - ORD

CMHORD

Columbus

Sat 9/13

6:50 am-7:19 am

Nonstop1h 29m

Chicago O'Hare Intl

Sat 9/20

9:06 pm-11:26 pm

Nonstop1h 20m

$129

PittsburghChicago

PIT - ORD

PITORD

Pittsburgh

Fri 8/29

2:10 pm-2:54 pm

Nonstop1h 44m

Chicago O'Hare Intl

Mon 9/1

7:24 am-10:01 am

Nonstop1h 37m

$134

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

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 1, 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 1, 2025.

The most flights from USOH to USIL are scheduled on a Thursday (67 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).

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 1, 2025.
Read through reviews of airlines operating flights from Ohio to Illinois, such as Southwest, Delta, and United 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
4,246 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,914 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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 $28. American Airlines flights start at $49 while deals on Delta 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 6 airlines flying from Ohio to Illinois

Discover the top 6 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 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$107Average$177FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$126Average$284FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$132Average$318FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$146Average$298FlexibilityNo cancel feeOn-time63%
Spirit AirlinesCheapest$179Average$359FlexibilityNo cancel feeOn-time65%
DeltaCheapest$570Average$1,383FlexibilityNo cancel feeOn-timeN/A

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