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$70+ Cheap flights from Illinois to Oklahoma

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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OKC
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Illinois to Oklahoma

Keep the following information in mind while searching for Illinois to Oklahoma flight deals. Data was last updated July 31, 2025.

Round-trip from

$106
(FlightHub)

One-way from

$70
(American Airlines)

Popular in

January

Cheapest in

August

Average price

$364

Good round-trip deal

$232 or less

Good one-way deal

$176 or less
From Illinois to Oklahoma
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One-way flight from Illinois to Oklahoma
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Highest demand for flights based on searches. 6% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Illinois to Oklahoma.
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Price to beat on a one-way flight from Illinois to Oklahoma.
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Find flight deals from Illinois to Oklahoma

Cheapest flights from Illinois to Oklahoma
Explore the most affordable flight options available from Illinois to Oklahoma. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/305:27 pmORD - DFW
Nonstop2h 49mFrontier
Tue 9/29:21 pmDFW - ORD
Nonstop2h 40mFrontier
Deal found 7/29$106
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/58:50 pmORD - DFW
Nonstop2h 32mSpirit Airlines
Sat 11/87:20 amDFW - ORD
Nonstop2h 24mSpirit Airlines
Deal found 7/30$108
This CheapOair deal was found by Cheapflights users on 7/28. 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.
Thu 10/96:00 amMDW - DFW
Nonstop2h 39mFrontier
Sun 10/129:52 pmDFW - MDW
Nonstop2h 19mFrontier
Deal found 7/28$119
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2810:17 amSTL - DFW
Nonstop1h 56mFrontier
Thu 9/48:00 amDFW - STL
Nonstop1h 54mFrontier
Deal found 7/31$127
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/211:45 pmORD - DFW
Nonstop2h 48mMultiple Airlines
Mon 10/279:28 pmDFW - ORD
Nonstop2h 22mMultiple Airlines
Deal found 7/30$132
This Booking.com deal was found by Cheapflights users on 7/29. 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.
Thu 8/282:30 pmSTL - DFW
1 stop5h 14mSpirit Airlines
Mon 9/16:45 amDFW - STL
1 stop6h 47mSpirit Airlines
Deal found 7/29$135
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/77:00 amSTL - DFW
Nonstop2h 00mAmerican Airlines
Sat 10/119:29 pmDFW - STL
Nonstop1h 49mAmerican Airlines
Deal found 7/29$139
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2110:17 amSTL - DFW
Nonstop1h 56mMultiple Airlines
Sun 8/246:45 amDFW - STL
1 stop6h 47mMultiple Airlines
Deal found 7/31$156
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/67:00 amORD - XNA
1 stop11h 31mFrontier
Fri 8/88:00 pmXNA - ORD
1 stop28h 32mFrontier
Deal found 7/29$195
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.
Tue 10/79:10 amSTL - DFW
1 stop7h 36mDelta
Sat 10/113:15 pmDFW - STL
1 stop7h 47mDelta
Deal found 7/31$197
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/134:31 pmMDW - DFW
1 stop4h 59mDelta
Wed 9/171:30 pmDFW - MDW
1 stop5h 05mDelta
Deal found 7/29$197
This FlightHub deal was found by Cheapflights users on 7/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/67:00 amORD - OKC
1 stop15h 38mFrontier
Sat 8/96:05 amOKC - ORD
1 stop18h 27mFrontier
Deal found 7/29$205

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Oklahoma 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 July 31, 2025.
Use the filters below to find and compare flights from Illinois to Oklahoma that are best for you.

Fly from

Illinois

Fly to

Oklahoma

Route

Depart

Return

Price

ChicagoDallas

ORD - DFW

ORDDFW

Chicago O'Hare Intl

Sat 8/30

5:27 pm-8:16 pm

Nonstop2h 49m

Dallas/Fort Worth

Tue 9/2

9:21 pm-12:01 am

Nonstop2h 40m

$106

ChicagoDallas

ORD - DFW

ORDDFW

Chicago O'Hare Intl

Thu 10/16

5:31 pm-8:06 pm

Nonstop2h 35m

Dallas/Fort Worth

Thu 10/23

2:15 pm-4:36 pm

Nonstop2h 21m

$108

ChicagoDallas

MDW - DFW

MDWDFW

Chicago Midway

Thu 10/9

6:00 am-8:39 am

Nonstop2h 39m

Dallas/Fort Worth

Sun 10/12

9:52 pm-12:11 am

Nonstop2h 19m

$119

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Thu 8/28

10:17 am-12:13 pm

Nonstop1h 56m

Dallas/Fort Worth

Thu 9/4

8:00 am-9:54 am

Nonstop1h 54m

$127

ChicagoDallas

ORD - DFW

ORDDFW

Chicago O'Hare Intl

Tue 10/21

1:45 pm-4:33 pm

Nonstop2h 48m

Dallas/Fort Worth

Thu 10/30

3:16 pm-5:37 pm

Nonstop2h 21m

$132

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Thu 8/28

2:30 pm-7:44 pm

1 stop5h 14m

Dallas/Fort Worth

Mon 9/1

6:45 am-1:32 pm

1 stop6h 47m

$135

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Tue 10/7

7:00 am-9:00 am

Nonstop2h 00m

Dallas/Fort Worth

Sat 10/11

9:29 pm-11:18 pm

Nonstop1h 49m

$139

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Thu 8/21

10:17 am-12:13 pm

Nonstop1h 56m

Dallas/Fort Worth

Sun 8/24

6:45 am-1:32 pm

1 stop6h 47m

$156

ChicagoFayetteville

ORD - XNA

ORDXNA

Chicago O'Hare Intl

Wed 8/6

7:00 am-6:31 pm

1 stop11h 31m

Fayetteville Northwest Arkansas

Fri 8/8

8:00 pm-12:32 am

1 stop28h 32m

$195

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Tue 10/7

9:10 am-4:46 pm

1 stop7h 36m

Dallas/Fort Worth

Sat 10/11

3:15 pm-11:02 pm

1 stop7h 47m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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

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

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

Currently, January is the cheapest month in which you can book a flight from Illinois to Oklahoma (average of $348). Flying from Illinois to Oklahoma in June is currently the most expensive (average of $401). 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 IL to OK?

Find hourly flight availability from Illinois to Oklahoma. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

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

Weekly flight availability from Illinois to Oklahoma

Explore weekly flight availability from Illinois to Oklahoma. 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 July 31, 2025.

The most flights from USIL to USOK 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 (12 on average).

Reviews of airlines servicing Oklahoma

Get insights into the airlines that provide service to Oklahoma. 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 Oklahoma. Reviews last updated July 31, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Illinois to Oklahoma to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

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

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

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

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

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

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

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

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

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.
Allegiant Air
7.2
Good
702 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Overall

8.0

Food

7.0

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 Illinois to Oklahoma. 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 Illinois to Oklahoma one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $70. However, be on the lookout for offers from Frontier and Spirit Airlines, as they are both options that can get you from Illinois to Oklahoma for a low price.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Illinois to Oklahoma (average of $348). Flying from Illinois to Oklahoma in June is currently the most expensive (average of $401). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Oklahoma

See prices for flight routes from nearby airports that may be better suited for you.
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Dallas/Fort Worth to LaGuardia flights
John F Kennedy Intl to Los Angeles flights
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Top 4 airlines flying from Illinois to Oklahoma

Discover the top 4 airlines that operate flights from Illinois to Oklahoma. 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$112Average$274FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$204Average$418FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$217Average$343FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$224Average$421FlexibilityNo cancel feeOn-time71%

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