HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Oklahoma

$36+ 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 10/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OKC
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Oklahoma with Cheapflights

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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 Illinois to Oklahoma

Keep the following information in mind while searching for Illinois to Oklahoma flight deals. Data was last updated September 16, 2025.

Round-trip from

$97
(Frontier)

One-way from

$36
(Cheapflightsfares)

Popular in

January

Cheapest in

July

Average price

$340

Good round-trip deal

$285 or less

Good one-way deal

$114 or less
From Illinois to Oklahoma
Search Deals
One-way flight from Illinois to Oklahoma
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Oklahoma.
Search Deals
Price to beat on a one-way flight from Illinois to Oklahoma.
Search Deals

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 September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Mon 11/107:30 pmORD - DFW
Nonstop2h 34mSpirit Airlines
Wed 11/197:20 amDFW - ORD
Nonstop2h 24mSpirit Airlines
Deal found 9/14$100
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/175:10 amMDW - DFW
Nonstop2h 35mFrontier
Mon 10/209:01 pmDFW - MDW
Nonstop2h 19mFrontier
Deal found 9/14$100
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/411:57 amORD - DFW
1 stop12h 02mSpirit Airlines
Mon 10/612:15 pmDFW - ORD
Nonstop2h 26mSpirit Airlines
Deal found 9/13$101
This Expedia deal was found by Cheapflights users on 9/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/117:43 pmORD - DFW
1 stop14h 02mSpirit Airlines
Wed 11/127:20 amDFW - ORD
Nonstop2h 24mSpirit Airlines
Deal found 9/15$102
This Booking.com deal was found by Cheapflights users on 9/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:43 pmORD - DFW
1 stop14h 02mMultiple Airlines
Wed 10/229:26 pmDFW - ORD
Nonstop2h 33mMultiple Airlines
Deal found 9/15$103
This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/78:55 amMDW - DFW
Nonstop2h 33mFrontier
Mon 11/102:57 pmDFW - MDW
Nonstop2h 18mFrontier
Deal found 9/14$103
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/910:17 amSTL - DFW
Nonstop1h 57mFrontier
Sun 10/127:30 amDFW - STL
Nonstop1h 52mFrontier
Deal found 9/14$104
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/610:05 pmORD - DFW
Nonstop2h 29mSpirit Airlines
Sun 11/97:20 amDFW - ORD
Nonstop2h 24mSpirit Airlines
Deal found 9/14$104
This Priceline deal was found by Cheapflights users on 9/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/314:52 pmSTL - DFW
1 stop5h 47mFrontier
Sun 11/29:17 amDFW - STL
Nonstop1h 52mFrontier
Deal found 9/14$105
This Priceline deal was found by Cheapflights users on 9/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/301:01 pmORD - DFW
Nonstop2h 38mMultiple Airlines
Mon 11/310:24 pmDFW - ORD
Nonstop2h 35mMultiple Airlines
Deal found 9/13$105
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:20 pmMDW - DFW
Nonstop2h 41mFrontier
Fri 10/179:01 pmDFW - MDW
Nonstop2h 19mFrontier
Deal found 9/15$105
This Orbitz deal was found by Cheapflights users on 9/14. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:25 amORD - DFW
Nonstop2h 33mMultiple Airlines
Mon 10/2012:15 pmDFW - ORD
Nonstop2h 26mMultiple Airlines
Deal found 9/14$106

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 September 16, 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

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Fri 10/31

4:52 pm-10:39 pm

1 stop5h 47m

Dallas/Fort Worth

Sun 11/2

9:17 am-11:09 am

Nonstop1h 52m

$105

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Thu 10/23

1:41 pm-11:27 am

1 stop21h 46m

Dallas/Fort Worth

Sun 10/26

7:30 am-9:22 am

Nonstop1h 52m

$108

ChicagoDallas

MDW - DFW

MDWDFW

Chicago Midway

Thu 10/23

5:20 pm-8:01 pm

Nonstop2h 41m

Dallas/Fort Worth

Sun 10/26

5:14 am-12:36 am

1 stop19h 22m

$112

ChicagoDallas

MDW - DFW

MDWDFW

Chicago Midway

Tue 10/7

5:20 pm-8:01 pm

Nonstop2h 41m

Dallas/Fort Worth

Sat 10/11

9:01 pm-11:20 pm

Nonstop2h 19m

$114

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Wed 10/22

7:52 pm-9:23 am

1 stop13h 31m

Dallas/Fort Worth

Mon 10/27

7:40 am-9:32 am

Nonstop1h 52m

$115

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Sun 11/2

12:20 pm-2:17 pm

Nonstop1h 57m

Dallas/Fort Worth

Tue 11/4

10:25 pm-9:07 am

1 stop10h 42m

$115

ChicagoDallas

ORD - DFW

ORDDFW

Chicago O'Hare Intl

Wed 10/29

4:03 pm-11:54 pm

1 stop7h 51m

Dallas/Fort Worth

Wed 11/5

7:20 am-9:44 am

Nonstop2h 24m

$116

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Wed 10/15

5:20 am-7:18 am

Nonstop1h 58m

Dallas/Fort Worth

Wed 10/22

9:29 pm-11:18 pm

Nonstop1h 49m

$139

ChicagoOklahoma City

ORD - OKC

ORDOKC

Chicago O'Hare Intl

Sat 10/11

7:05 am-4:38 pm

1 stop9h 33m

Oklahoma City Will Rogers World

Mon 10/13

5:48 pm-11:39 pm

1 stop5h 51m

$144

St. LouisDallas

STL - DFW

STLDFW

Lambert-St Louis

Fri 10/3

9:32 pm-10:34 am

1 stop13h 02m

Dallas/Fort Worth

Sun 10/5

8:18 pm-8:37 pm

1 stop24h 19m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 results
1
2
3
...
6

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, August is the cheapest month in which you can book a flight from Illinois to Oklahoma (average of $334). 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 September 16, 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 September 16, 2025.

The most flights from USIL to USOK are scheduled on a Monday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 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 September 16, 2025.
Peruse reviews from past customers who have flown with Southwest, United Airlines, and American 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
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

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
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

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
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

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
3,174 reviews
Southwest
8.0
Very good
4,242 reviews

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Food

7.0

Entertainment

7.5

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 Illinois to Oklahoma. 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 Illinois to Oklahoma?

    There are many flights that can get you from Illinois to Oklahoma in 1h 58m. Fly via Frontier, Spirit Airlines, or American Airlines to get the fastest option. The distance from Illinois to Oklahoma is about 550 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $64. However, be on the lookout for offers from Spirit Airlines and Southwest, 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, August is the cheapest month in which you can book a flight from Illinois to Oklahoma (average of $334). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Oklahoma

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to Miami flights
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to Las Vegas flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
LaGuardia to Dallas/Fort Worth flights
Dallas/Fort Worth to Seattle flights
Newark to Fort Lauderdale flights
John F Kennedy Intl to O'Hare Intl flights
Los Angeles to Newark flights
O'Hare Intl to John F Kennedy Intl flights
Dallas/Fort Worth to LaGuardia flights
Newark to Las Vegas flights
LaGuardia to O'Hare Intl flights
LaGuardia to Fort Lauderdale flights
Seattle to Las Vegas flights
O'Hare Intl to Las Vegas flights
Newark to O'Hare Intl flights
O'Hare Intl to LaGuardia flights
Newark to Miami flights
San Francisco to Las Vegas flights
John F Kennedy Intl to Atlanta flights
John F Kennedy Intl to Orlando flights
Newark to Dallas/Fort Worth flights
John F Kennedy Intl to Dallas/Fort Worth flights
Dallas/Fort Worth to O'Hare Intl flights
John F Kennedy Intl to San Francisco flights
Seattle to Dallas/Fort Worth flights
Seattle to Los Angeles flights
Newark to Los Angeles flights
Dallas/Fort Worth to Denver flights
LaGuardia to Miami flights
Los Angeles to Honolulu flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to LaGuardia flights
O'Hare Intl to Dallas/Fort Worth flights
San Francisco to Newark flights
Newark to Orlando flights
O'Hare Intl to Newark flights
Atlanta to John F Kennedy Intl flights
Dallas/Fort Worth to Los Angeles flights
Los Angeles to O'Hare Intl flights
Dallas/Fort Worth to Newark flights
John F Kennedy Intl to Fort Lauderdale flights
John F Kennedy Intl to Sky Harbor Intl flights
Dulles Intl to Dallas/Fort Worth flights
Atlanta to Las Vegas flights

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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$131Average$350FlexibilityNo cancel feeOn-time63%
FrontierCheapest$137Average$287FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$223Average$408FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$285Average$430FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.