$45+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
CVG — ORD
Feb 15 — Feb 221
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 January 16, 2026.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $128 (Expedia) |
One-way from | $45 (Expedia) |
Popular in | January |
Cheapest in | August |
Average price | $378 |
Good round-trip deal | $294 or less |
Good one-way deal | $183 or less |
Find flight deals from Ohio to Illinois
Cheapest flights from Ohio to IllinoisExplore 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 January 16, 2026.
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 January 16, 2026.
This Expedia deal was found by Cheapflights users on 1/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/118:30 am
DTW
- STL
1 stop6h 28m
Frontier
Wed 2/188:17 pm
STL
- DTW
1 stop10h 50m
Frontier
Deal found 1/14![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 1/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/272:35 pm
DTW
- STL
1 stop17h 16m
Multiple Airlines
Mon 3/28:22 pm
STL
- DTW
1 stop16h 08m
Multiple Airlines
Deal found 1/14![Multiple Airlines logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 1/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/282:35 pm
DTW
- MDW
1 stop8h 04m
Multiple Airlines
Wed 3/47:15 am
MDW
- DTW
1 stop7h 42m
Multiple Airlines
Deal found 1/13![Multiple Airlines logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 1/15. 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.
Wed 2/182:35 pm
DTW
- MDW
1 stop5h 32m
Multiple Airlines
Fri 2/206:48 pm
MDW
- DTW
1 stop12h 44m
Multiple Airlines
Deal found 1/15![Multiple Airlines logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 1/15. 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 2/1310:29 pm
DTW
- STL
1 stop9h 22m
Frontier
Sat 2/142:51 pm
STL
- DTW
1 stop8h 04m
Frontier
Deal found 1/15![Frontier logo]()
$138
This Mytrip deal was found by Cheapflights users on 1/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2310:05 pm
DTW
- ORD
1 stop12h 17m
Spirit Airlines
Thu 2/265:58 pm
ORD
- DTW
1 stop12h 43m
Spirit Airlines
Deal found 1/14![Spirit Airlines logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 1/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/75:00 am
DTW
- ORD
1 stop18h 42m
Spirit Airlines
Tue 2/105:53 pm
ORD
- DTW
1 stop12h 48m
Spirit Airlines
Deal found 1/14![Spirit Airlines logo]()
$140
This Mytrip deal was found by Cheapflights users on 1/15. 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.
Thu 2/510:07 pm
DTW
- ORD
1 stop12h 05m
Spirit Airlines
Sat 2/74:38 pm
ORD
- DTW
1 stop14h 18m
Spirit Airlines
Deal found 1/15![Spirit Airlines logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 1/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/112:36 pm
DTW
- MDW
1 stop21h 51m
Multiple Airlines
Wed 2/187:00 am
MDW
- DTW
1 stop5h 30m
Multiple Airlines
Deal found 1/14![Multiple Airlines logo]()
$143
This Frontier deal was found by Cheapflights users on 1/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/216:25 pm
DTW
- STL
1 stop6h 34m
Frontier
Wed 2/258:17 pm
STL
- DTW
1 stop10h 50m
Frontier
Deal found 1/13![Frontier logo]()
$144
This Mytrip deal was found by Cheapflights users on 1/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/122:06 pm
DTW
- ORD
1 stop11h 34m
Spirit Airlines
Mon 2/166:51 pm
ORD
- DTW
1 stop11h 58m
Spirit Airlines
Deal found 1/14![Spirit Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 1/15. 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 2/1310:29 pm
DTW
- MDW
1 stop23h 39m
Multiple Airlines
Mon 3/22:19 pm
MDW
- DTW
1 stop22h 11m
Multiple Airlines
Deal found 1/15![Multiple Airlines logo]()
$144
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 January 16, 2026.
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
DetroitChicago
DTW - MDW
DTWMDW
Detroit Metropolitan Wayne County
Wed 2/18
2:35 pm-7:07 pm
1 stop5h 32m
Chicago Midway
Fri 2/20
6:48 pm-8:32 am
1 stop12h 44m
$136
DetroitSt. Louis
DTW - STL
DTWSTL
Detroit Metropolitan Wayne County
Fri 2/13
10:29 pm-6:51 am
1 stop9h 22m
Lambert-St Louis
Sat 2/14
2:51 pm-11:55 pm
1 stop8h 04m
$138
DetroitSt. Louis
DTW - STL
DTWSTL
Detroit Metropolitan Wayne County
Thu 2/19
10:10 am-6:51 am
1 stop21h 41m
Lambert-St Louis
Sat 2/21
2:51 pm-11:55 pm
1 stop8h 04m
$152
DetroitChicago
DTW - ORD
DTWORD
Detroit Metropolitan Wayne County
Tue 2/10
12:49 pm-1:13 pm
Nonstop1h 24m
Chicago O'Hare Intl
Tue 2/10
6:00 pm-8:28 pm
Nonstop1h 28m
$153
DetroitChicago
DTW - ORD
DTWORD
Detroit Metropolitan Wayne County
Wed 2/11
4:30 pm-4:57 pm
Nonstop1h 27m
Chicago O'Hare Intl
Wed 2/18
10:35 am-12:54 pm
Nonstop1h 19m
$153
DetroitChicago
DTW - ORD
DTWORD
Detroit Metropolitan Wayne County
Wed 5/13
9:00 am-9:24 am
Nonstop1h 24m
Chicago O'Hare Intl
Wed 5/13
7:35 pm-10:03 pm
Nonstop1h 28m
$153
DetroitChicago
DTW - MDW
DTWMDW
Detroit Metropolitan Wayne County
Tue 2/10
8:25 am-8:52 am
Nonstop1h 27m
Chicago Midway
Tue 2/10
6:35 pm-8:45 pm
Nonstop1h 10m
$153
DetroitChicago
DTW - ORD
DTWORD
Detroit Metropolitan Wayne County
Thu 2/12
4:13 pm-4:41 pm
Nonstop1h 28m
Chicago O'Hare Intl
Mon 2/16
10:35 am-12:54 pm
Nonstop1h 19m
$157
DetroitChicago
DTW - ORD
DTWORD
Detroit Metropolitan Wayne County
Mon 2/16
4:13 pm-4:41 pm
Nonstop1h 28m
Chicago O'Hare Intl
Thu 2/19
6:30 am-9:02 am
Nonstop1h 32m
$157
DetroitChicago
DTW - MDW
DTWMDW
Detroit Metropolitan Wayne County
Mon 2/16
5:15 pm-5:37 pm
Nonstop1h 22m
Chicago Midway
Thu 2/19
1:26 pm-3:36 pm
Nonstop1h 10m
$157
Showing 1-10 of 60 results
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, September is the cheapest month in which you can book a flight from Ohio to Illinois (average of $96). Flying from Ohio to Illinois in February is currently the most expensive (average of $159). 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 January 16, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 28% on flights from Ohio to Illinois by exploring options for tickets in the morning.
What is the cheapest day to fly from Ohio to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Ohio to Illinois. Price data was last updated on January 10, 2026.
Travelers seeking maximum savings on their Ohio to Illinois flight should consider departing on Tuesday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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 January 16, 2026.
The most flights from USOH to USIL are scheduled on a Friday (50 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (26 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 January 16, 2026.
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.
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
8.0
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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.
Browse thousands of different options on Cheapflights for your next trip
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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.
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 January 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$90 | Average$228 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$132 | Average$288 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$137 | Average$303 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$137 | Average$311 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$143 | Average$190 | FlexibilityNo cancel fee | On-time62% |