HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$89+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Oklahoma City to Illinois 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 Oklahoma City to Illinois

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

Round-trip from

$177
(Southwest)

One-way from

$89
(Southwest)

Popular in

March

Cheapest in

February

Average price

$370

Good round-trip deal

$306 or less

Good one-way deal

$199 or less
From Oklahoma City Will Rogers World to Illinois
Search Deals
One-way flight from Oklahoma City Will Rogers World to Illinois
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from Oklahoma City Will Rogers World to Illinois.
Search Deals
Price to beat on a one-way flight from Oklahoma City Will Rogers World to Illinois.
Search Deals

Find flight deals from Oklahoma City to Illinois

Cheapest flights from Oklahoma City to Illinois
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 July 29, 2025.

This Southwest deal was found by Cheapflights users on 7/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/264:30 pmOKC - STL
Nonstop1h 25mSouthwest
Sat 8/301:45 pmSTL - OKC
Nonstop1h 25mSouthwest
Deal found 7/27$177
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/266:50 amOKC - STL
1 stop7h 47mDelta
Tue 9/25:11 pmSTL - OKC
1 stop6h 48mDelta
Deal found 7/28$187
This FlightHub deal was found by Cheapflights users on 7/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/126:05 amOKC - STL
1 stop27h 06mFrontier
Sat 8/167:29 pmSTL - OKC
1 stop21h 46mFrontier
Deal found 7/27$205
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/93:15 pmOKC - MDW
Nonstop1h 55mSouthwest
Tue 9/165:15 pmMDW - OKC
Nonstop2h 00mSouthwest
Deal found 7/29$217
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/234:10 pmOKC - ORD
Nonstop2h 17mUnited Airlines
Tue 8/261:05 pmORD - OKC
Nonstop2h 23mUnited Airlines
Deal found 7/28$217
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1412:11 pmOKC - MDW
1 stop11h 06mFrontier
Mon 8/188:35 amMDW - OKC
1 stop10h 39mFrontier
Deal found 7/28$218
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1412:11 pmOKC - ORD
1 stop12h 11mFrontier
Mon 8/185:40 amORD - OKC
1 stop11h 35mFrontier
Deal found 7/28$218
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.
Wed 9/106:53 amOKC - ORD
Nonstop2h 18mAmerican Airlines
Thu 9/116:30 pmORD - OKC
Nonstop2h 23mAmerican Airlines
Deal found 7/29$223
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/35:50 amOKC - MDW
1 stop7h 46mDelta
Wed 9/176:30 pmMDW - OKC
1 stop5h 28mDelta
Deal found 7/28$237
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/34:01 pmOKC - ORD
1 stop6h 36mDelta
Tue 9/165:30 amORD - OKC
1 stop5h 05mDelta
Deal found 7/28$237
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.
Fri 8/296:51 pmOKC - STL
1 stop4h 08mAmerican Airlines
Sun 8/318:10 amSTL - OKC
1 stop6h 12mAmerican Airlines
Deal found 7/29$241
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2310:45 amOKC - ORD
1 stop5h 40mSouthwest
Tue 8/2612:40 pmORD - OKC
1 stop5h 05mSouthwest
Deal found 7/28$243

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 July 29, 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

Tue 8/26

4:30 pm-5:55 pm

Nonstop1h 25m

Lambert-St Louis

Sat 8/30

1:45 pm-3:10 pm

Nonstop1h 25m

$177

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Tue 8/26

6:50 am-2:37 pm

1 stop7h 47m

Lambert-St Louis

Tue 9/2

5:11 pm-11:59 pm

1 stop6h 48m

$187

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Sat 8/23

5:49 pm-11:14 pm

1 stop5h 25m

Lambert-St Louis

Sun 8/24

4:32 pm-11:09 pm

1 stop6h 37m

$192

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Tue 8/12

6:05 am-9:11 am

1 stop27h 06m

Lambert-St Louis

Sat 8/16

7:29 pm-5:15 pm

1 stop21h 46m

$205

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Sat 8/23

4:10 pm-6:27 pm

Nonstop2h 17m

Chicago O'Hare Intl

Tue 8/26

1:05 pm-3:28 pm

Nonstop2h 23m

$217

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Tue 9/9

3:15 pm-5:10 pm

Nonstop1h 55m

Chicago Midway

Tue 9/16

5:15 pm-7:15 pm

Nonstop2h 00m

$217

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Thu 8/14

12:11 pm-11:17 pm

1 stop11h 06m

Chicago Midway

Mon 8/18

8:35 am-7:14 pm

1 stop10h 39m

$218

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Thu 8/14

12:11 pm-12:22 am

1 stop12h 11m

Chicago O'Hare Intl

Mon 8/18

5:40 am-5:15 pm

1 stop11h 35m

$218

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Wed 9/10

6:53 am-9:11 am

Nonstop2h 18m

Chicago O'Hare Intl

Thu 9/11

6:30 pm-8:53 pm

Nonstop2h 23m

$223

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Wed 9/3

5:50 am-1:36 pm

1 stop7h 46m

Chicago Midway

Wed 9/17

6:30 pm-11:58 pm

1 stop5h 28m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 45 results
1
2
3
...
5

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, August is the cheapest month in which you can book a flight from Oklahoma City to Illinois (average of $245). Flying from Oklahoma City 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 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 July 29, 2025.

When flying from Oklahoma City to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 July 29, 2025.

The most flights from OKC to USIL are scheduled on a Monday (28 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (16 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 July 29, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United 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.
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
7,977 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
8,899 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

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
703 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

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 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.

  • What airport do you fly from for flights from Oklahoma City to Illinois?

    Most people fly from Oklahoma City Will Rogers World (OKC) if they book a flight from Oklahoma City to Illinois. Oklahoma City Will Rogers World is conveniently located just 7.0 mi from Oklahoma City’s city center.

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

    $89 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on Delta and Frontier, with prices starting from $94 and $96, respectively.

  • What are the most popular routes from Oklahoma City to Illinois?

    When deciding which route to take from Oklahoma City to Illinois consider Oklahoma City Will Rogers World - Chicago O'Hare Intl, Oklahoma City Will Rogers World - Chicago Midway or Oklahoma City Will Rogers World - Lambert-St Louis as they are the most popular.

  • What are the most reliable airlines from Oklahoma City to Illinois?

    No one likes to see their flight delayed. When booking a flight from Oklahoma City to Illinois consider choosing Republic Airways (96%), Envoy Air (84%) or Emirates (83%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Oklahoma City to Illinois?

    Looking at all options, your cheapest flight can be booked for $144. While the most popular route (Oklahoma City Will Rogers World - Chicago O'Hare Intl) can be booked for $217 on average our data indicates $1,314 when flying from Oklahoma City to Illinois.

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

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

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

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

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

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

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

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 Oklahoma City to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Las Vegas flights
Dallas/Fort Worth to O'Hare Intl flights
Dallas/Fort Worth to Seattle flights
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to Los Angeles flights
Dallas/Fort Worth to Denver flights
Dallas/Fort Worth to Newark flights
Dallas/Fort Worth to Boston flights
Dallas/Fort Worth to Orlando flights
Dallas/Fort Worth to Baltimore flights
Dallas/Fort Worth to Miami flights
Dallas/Fort Worth to Portland flights
Dallas/Fort Worth to Dulles Intl flights
Dallas/Fort Worth to San Francisco flights
Dallas/Fort Worth to Minneapolis flights
Dallas/Fort Worth to Fort Lauderdale flights
Dallas/Fort Worth to Midway flights
Dallas/Fort Worth to Reagan-National flights
Dallas/Fort Worth to Sky Harbor Intl flights
Dallas/Fort Worth to Honolulu flights
Dallas/Fort Worth to San Diego flights
Oklahoma City to Seattle flights
Dallas/Fort Worth to Hobby flights
Dallas/Fort Worth to Burbank flights
Dallas/Fort Worth to Atlanta flights
Dallas/Fort Worth to Salt Lake City flights
Dallas/Fort Worth to George Bush Intcntl flights
Dallas/Fort Worth to Detroit flights
Oklahoma City to Salt Lake City flights
Dallas/Fort Worth to Santa Ana flights
Dallas/Fort Worth to Philadelphia flights
Oklahoma City to LaGuardia flights
Dallas/Fort Worth to Brownsville flights
Dallas/Fort Worth to Columbus flights
Oklahoma City to John F Kennedy Intl flights
Dallas/Fort Worth to Nashville flights
Dallas/Fort Worth to San Jose flights
Dallas/Fort Worth to Oakland flights
Dallas/Fort Worth to Ontario flights
Dallas/Fort Worth to New Orleans flights
Oklahoma City to Newark flights
Dallas/Fort Worth to Charlotte flights
Dallas/Fort Worth to Cincinnati flights
Oklahoma City to Miami flights
Dallas/Fort Worth to Cleveland flights
Dallas/Fort Worth to Tampa flights
Dallas/Fort Worth to Hartford flights
Dallas/Fort Worth to El Paso flights
Oklahoma City to Denver flights

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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$195FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$233Average$392FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$243Average$420FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$300Average$365FlexibilityNo cancel feeOn-time63%

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.