$64+ Cheap flights from Oklahoma City (OKC) 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 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Jan 11 — Jan 181
1 adult, Economy
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Cheapest flights from Oklahoma City to IllinoisExplore the most affordable flight options available from Oklahoma City to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.
Explore the most affordable flight options available from Oklahoma City to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.
This Priceline deal was found by Cheapflights users on 12/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/144:29 pmOKC - MDW
1 stop5h 43mFrontier
Mon 12/1512:18 pmMDW - OKC
1 stop7h 14mFrontier
Deal found 12/10![Frontier logo]()
$313
This Expedia deal was found by Cheapflights users on 12/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/124:49 pmOKC - MDW
1 stop5h 23mFrontier
Sun 12/146:15 amMDW - OKC
1 stop9h 04mFrontier
Deal found 12/9![Frontier logo]()
$332
This Expedia deal was found by Cheapflights users on 12/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/124:49 pmOKC - ORD
1 stop5h 35mFrontier
Sun 12/146:11 amORD - OKC
1 stop9h 08mFrontier
Deal found 12/9![Frontier logo]()
$332
This Frontier deal was found by Cheapflights users on 12/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/262:18 pmOKC - ORD
1 stop9h 54mFrontier
Tue 12/306:00 amORD - OKC
1 stop11h 29mFrontier
Deal found 12/11![Frontier logo]()
$333
This American Airlines deal was found by Cheapflights users on 12/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:30 amOKC - ORD
Nonstop2h 21mAmerican Airlines
Sun 12/289:00 pmORD - OKC
Nonstop2h 28mAmerican Airlines
Deal found 12/11![American Airlines logo]()
$345
This Trip.com deal was found by Cheapflights users on 12/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:39 pmOKC - STL
1 stop26h 54mFrontier
Tue 12/3010:48 amSTL - OKC
1 stop6h 41mFrontier
Deal found 12/11![Frontier logo]()
$350
This American Airlines deal was found by Cheapflights users on 12/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:00 amOKC - ORD
1 stop6h 40mAmerican Airlines
Sun 12/289:00 pmORD - OKC
Nonstop2h 28mAmerican Airlines
Deal found 12/11![American Airlines logo]()
$355
This Kiwi.com deal was found by Cheapflights users on 12/10. 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.
Thu 12/254:37 pmOKC - MDW
1 stop5h 35mFrontier
Mon 12/296:12 amMDW - OKC
2 stops36h 37mFrontier
Deal found 12/10![Frontier logo]()
$366
This Frontier deal was found by Cheapflights users on 12/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/118:29 pmOKC - ORD
1 stop27h 43mFrontier
Mon 12/157:00 amORD - OKC
1 stop12h 32mFrontier
Deal found 12/11![Frontier logo]()
$374
This Kiwi.com deal was found by Cheapflights users on 12/9. 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.
Sun 12/2112:01 pmOKC - ORD
1 stop20h 46mFrontier
Wed 1/74:49 pmORD - OKC
1 stop24h 44mFrontier
Deal found 12/9![Frontier logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 12/9. 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.
Sun 12/2112:01 pmOKC - ORD
1 stop20h 46mMultiple Airlines
Wed 1/74:38 pmORD - OKC
2 stops27h 00mMultiple Airlines
Deal found 12/9![Multiple Airlines logo]()
$394
This Kiwi.com deal was found by Cheapflights users on 12/9. 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.
Tue 12/168:29 pmOKC - ORD
2 stops41h 48mFrontier
Wed 12/2412:39 pmORD - OKC
1 stop26h 58mFrontier
Deal found 12/9![Frontier logo]()
$399
Find flight deals from Oklahoma City to Illinois
Keep the following information in mind while searching for Oklahoma City to Illinois flight deals. Data was last updated December 12, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $144 (Kiwi.com) |
One-way from | $64 (Frontier) |
Popular in | December |
Cheapest in | September |
Average price | $417 |
Good round-trip deal | $358 or less |
Good one-way deal | $273 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Oklahoma City 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 December 12, 2025.
Use the filters below to find and compare flights from Oklahoma City to Illinois that are best for you.
Fly from
Oklahoma City
Fly to
Illinois
Route
Depart
Return
Price
Oklahoma CitySt. Louis
OKC - STL
OKCSTL
Oklahoma City Will Rogers World
Fri 1/9
8:29 pm-10:02 am
1 stop13h 33m
Lambert-St Louis
Mon 1/12
7:43 pm-2:24 pm
1 stop18h 41m
$144
Oklahoma CitySt. Louis
OKC - STL
OKCSTL
Oklahoma City Will Rogers World
Sat 1/10
3:53 pm-8:40 am
2 stops16h 47m
Lambert-St Louis
Mon 1/12
7:43 pm-2:24 pm
1 stop18h 41m
$192
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Thu 1/15
6:30 pm-7:17 am
1 stop12h 47m
Chicago Midway
Fri 1/16
9:09 pm-2:24 pm
1 stop17h 15m
$194
Oklahoma CitySt. Louis
OKC - STL
OKCSTL
Oklahoma City Will Rogers World
Sun 1/25
8:29 pm-12:50 pm
1 stop16h 21m
Lambert-St Louis
Sun 2/1
12:03 pm-11:30 am
2 stops23h 27m
$200
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Thu 1/15
8:29 pm-7:54 pm
1 stop23h 25m
Chicago Midway
Sun 1/18
6:10 am-5:35 pm
1 stop11h 25m
$223
Oklahoma CityMoline
OKC - MLI
OKCMLI
Oklahoma City Will Rogers World
Thu 2/19
6:45 am-1:29 pm
1 stop6h 44m
Moline Quad-City
Mon 2/23
1:59 pm-9:26 pm
1 stop7h 27m
$249
Oklahoma CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Sat 1/17
1:40 pm-3:58 pm
Nonstop2h 18m
Chicago O'Hare Intl
Tue 1/20
4:22 pm-7:01 pm
Nonstop2h 39m
$253
Oklahoma CityPeoria
OKC - PIA
OKCPIA
Oklahoma City Will Rogers World
Wed 1/7
10:00 am-2:23 pm
1 stop4h 23m
Greater Peoria
Tue 1/13
1:24 pm-7:01 pm
1 stop5h 37m
$269
Oklahoma CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Sat 1/17
11:25 am-4:44 pm
1 stop5h 19m
Chicago O'Hare Intl
Tue 1/20
5:59 pm-12:03 am
1 stop6h 04m
$273
Oklahoma CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Wed 2/18
1:44 pm-4:00 pm
Nonstop2h 16m
Chicago O'Hare Intl
Sat 2/21
11:45 am-6:38 pm
1 stop6h 53m
$288
Showing 1-10 of 60 results
Best time to book a flight from Oklahoma City to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Oklahoma City 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 Oklahoma City to Illinois
What is the cheapest month to book a flight from Oklahoma City to Illinois?
Currently, February is the cheapest month in which you can book a flight from Oklahoma City to Illinois (average of $129). Flying from Oklahoma City to Illinois in November is currently the most expensive (average of $267). 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 OKC to IL?
Find hourly flight availability from Oklahoma City 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 December 12, 2025.
It’s optimal to fly from Oklahoma City to Illinois in the morning. By choosing this option you can save up to 17% on the cost of your flight, compared to a flight in the evening.
What is the cheapest day to fly from Oklahoma City to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Oklahoma City to Illinois. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their Oklahoma City to Illinois flight should consider departing on Tuesday evenings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Oklahoma City to Illinois
Explore weekly flight availability from Oklahoma City 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 December 12, 2025.
The most flights from OKC to USIL are scheduled on a Thursday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 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 December 12, 2025.
Peruse reviews from past customers who have flown with Southwest, United Airlines, and American Airlines from Oklahoma City to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Oklahoma City to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Oklahoma City to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 4 airlines flying from Oklahoma City to Illinois
Discover the top 4 airlines that operate flights from Oklahoma City 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 December 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$238 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$241 | Average$374 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$248 | Average$360 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$270 | Average$421 | FlexibilityNo cancel fee | On-time69% |