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$34+ Cheap flights from Oklahoma 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
1 adult, Economy
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Cheap flight deals from Oklahoma to Illinois

Keep the following information in mind while searching for Oklahoma to Illinois flight deals. Data was last updated September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$109
(CheapOair)

One-way from

$34
(Priceline)

Popular in

March

Cheapest in

September

Average price

$298

Good round-trip deal

$366 or less

Good one-way deal

$170 or less
Provider with most accurate pricing for Oklahoma City Will Rogers World-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Oklahoma City Will Rogers World-Chicago (CHI) flights.
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From Oklahoma to Illinois
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One-way flight from Oklahoma to Illinois
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Highest demand for flights based on searches. 3% potential increase in price ($13 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Oklahoma to Illinois.
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Price to beat on a one-way flight from Oklahoma to Illinois.
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Find flight deals from Oklahoma to Illinois

Cheapest flights from Oklahoma to Illinois
Explore the most affordable flight options available from Oklahoma to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 29, 2025.

This CheapOair deal was found by Cheapflights users on 9/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2410:56 pmDFW - ORD
Nonstop2h 35mFrontier
Sun 10/265:25 amORD - DFW
Nonstop2h 33mFrontier
Deal found 9/28$109
This Trip.com deal was found by Cheapflights users on 9/28. 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.
Thu 10/239:05 amDFW - ORD
Nonstop2h 28mSpirit Airlines
Fri 10/243:36 pmORD - DFW
Nonstop2h 36mSpirit Airlines
Deal found 9/28$111
This Cheapflightsfares deal was found by Cheapflights users on 9/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/610:41 amDFW - MDW
Nonstop2h 30mFrontier
Tue 10/75:20 pmMDW - DFW
Nonstop2h 41mFrontier
Deal found 9/28$111
This Frontier deal was found by Cheapflights users on 9/28. 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.
Sun 10/267:30 amDFW - STL
Nonstop1h 52mFrontier
Thu 10/306:22 pmSTL - DFW
Nonstop1h 57mFrontier
Deal found 9/28$112
This Frontier deal was found by Cheapflights users on 9/27. 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.
Wed 11/510:24 pmDFW - ORD
Nonstop2h 35mFrontier
Thu 11/63:18 pmORD - DFW
1 stop6h 55mFrontier
Deal found 9/27$112
This Frontier deal was found by Cheapflights users on 9/28. 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.
Wed 11/58:59 pmDFW - MDW
1 stop12h 13mFrontier
Fri 11/78:55 amMDW - DFW
Nonstop2h 33mFrontier
Deal found 9/28$112
This Booking.com deal was found by Cheapflights users on 9/29. 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.
Tue 10/2810:25 pmDFW - STL
1 stop10h 42mFrontier
Thu 10/306:22 pmSTL - DFW
Nonstop1h 57mFrontier
Deal found 9/29$113
This Mytrip deal was found by Cheapflights users on 9/27. 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 10/229:26 pmDFW - ORD
Nonstop2h 33mMultiple Airlines
Thu 10/234:59 pmORD - DFW
1 stop7h 11mMultiple Airlines
Deal found 9/27$113
This Priceline deal was found by Cheapflights users on 9/27. 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.
Thu 10/3010:24 pmDFW - ORD
Nonstop2h 35mMultiple Airlines
Mon 11/34:57 pmORD - DFW
1 stop7h 02mMultiple Airlines
Deal found 9/27$114
This Cheapflightsfares deal was found by Cheapflights users on 9/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/139:57 pmDFW - MDW
Nonstop2h 19mFrontier
Thu 10/165:20 pmMDW - DFW
Nonstop2h 41mFrontier
Deal found 9/27$114
This Cheapflightsfares deal was found by Cheapflights users on 9/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/239:05 amDFW - ORD
Nonstop2h 28mSpirit Airlines
Mon 10/2711:55 amORD - DFW
1 stop12h 15mSpirit Airlines
Deal found 9/27$115
This Frontier deal was found by Cheapflights users on 9/27. 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 10/48:18 pmDFW - MDW
1 stop13h 00mFrontier
Mon 10/67:15 amMDW - DFW
Nonstop2h 31mFrontier
Deal found 9/27$115

Cheapflights Fare Finder

 
Customize your flight search to find flights from Oklahoma 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 29, 2025.
Use the filters below to find and compare flights from Oklahoma to Illinois that are best for you.

Fly from

Oklahoma

Fly to

Illinois

Route

Depart

Return

Price

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Fri 10/24

8:11 pm-6:02 pm

1 stop21h 51m

Lambert-St Louis

Sun 10/26

10:17 am-12:14 pm

Nonstop1h 57m

$124

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Fri 10/24

7:21 pm-12:59 am

1 stop5h 38m

Chicago O'Hare Intl

Sun 10/26

5:05 am-4:53 pm

1 stop11h 48m

$144

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Sat 11/1

10:25 pm-10:07 am

1 stop11h 42m

Lambert-St Louis

Sun 11/2

12:20 pm-2:17 pm

Nonstop1h 57m

$148

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Thu 10/30

3:35 pm-5:27 pm

Nonstop1h 52m

Lambert-St Louis

Thu 10/30

8:40 pm-8:31 am

1 stop11h 51m

$160

FayettevilleChicago

XNA - ORD

XNAORD

Fayetteville Northwest Arkansas

Fri 10/24

7:29 pm-11:53 pm

1 stop28h 24m

Chicago O'Hare Intl

Fri 10/31

6:00 am-6:44 pm

1 stop12h 44m

$169

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Mon 10/27

7:19 pm-11:38 am

2 stops16h 19m

Chicago Midway

Mon 11/3

12:30 pm-7:00 pm

1 stop6h 30m

$194

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Sat 11/1

6:50 am-11:34 am

1 stop4h 44m

Lambert-St Louis

Tue 11/4

5:15 pm-10:18 pm

1 stop5h 03m

$197

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Sat 11/1

6:50 am-11:34 am

1 stop4h 44m

Lambert-St Louis

Sat 11/1

5:15 pm-9:52 pm

1 stop4h 37m

$197

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

Tue 11/4

9:53 am-2:43 pm

1 stop4h 50m

Lambert-St Louis

Sat 11/8

7:05 am-12:54 pm

1 stop5h 49m

$197

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

Thu 12/25

11:23 am-5:22 pm

1 stop5h 59m

Chicago O'Hare Intl

Wed 12/31

6:35 am-1:43 pm

1 stop7h 08m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/26

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

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

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

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

Find hourly flight availability from Oklahoma 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 29, 2025.

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

Weekly flight availability from Oklahoma to Illinois

Explore weekly flight availability from Oklahoma 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 September 29, 2025.

The most flights from USOK to USIL are scheduled on a Monday (29 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (20 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 September 29, 2025.
See what other customers who have flown with Southwest, United Airlines, and American Airlines from Oklahoma to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,245 reviews
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,924 reviews
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,157 reviews
Southwest
8.0
Very good
4,245 reviews

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Oklahoma 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 Oklahoma to Illinois?

    A quick flight from Oklahoma to Illinois can take about 2h. Frontier provides one of the quickest options available for as low as $209. There are 522 mi between Oklahoma and Illinois. This flight may include one or multiple stops.

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

    One-way options have recently been found by users for as low as $60 on Spirit Airlines. Other airlines that offer cheap prices include Frontier from $63 and United Airlines from $74 one-way.

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

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

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

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

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

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

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

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Oklahoma to Illinois

Discover the top 4 airlines that operate flights from Oklahoma 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$188FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$174Average$337FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$182Average$414FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$197Average$361FlexibilityNo cancel feeOn-time63%

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