HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$68+ 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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
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

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 January 27, 2026.

This Southwest deal was found by Cheapflights users on 1/27. 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 2/174:30 pm
OKC
-
STL
Nonstop1h 25m
Southwest
Thu 2/199:50 am
STL
-
OKC
Nonstop1h 40m
Southwest
Deal found 1/27$134
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 2/234:52 pm
OKC
-
ORD
1 stop5h 47m
Frontier
Mon 3/25:05 am
ORD
-
OKC
1 stop10h 51m
Frontier
Deal found 1/26$138
This Kiwi.com deal was found by Cheapflights users on 1/25. 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 2/268:30 pm
OKC
-
ORD
1 stop16h 55m
Frontier
Mon 3/25:05 am
ORD
-
OKC
1 stop10h 51m
Frontier
Deal found 1/25$153
This Kiwi.com deal was found by Cheapflights users on 1/24. 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 2/274:52 pm
OKC
-
ORD
1 stop5h 47m
Frontier
Sun 3/14:16 pm
ORD
-
OKC
1 stop27h 29m
Frontier
Deal found 1/24$156
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/274:52 pm
OKC
-
ORD
1 stop17h 59m
Frontier
Mon 3/25:05 am
ORD
-
OKC
1 stop10h 51m
Frontier
Deal found 1/27$160
This American Airlines deal was found by Cheapflights users on 1/25. 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 4/147:00 pm
OKC
-
STL
1 stop4h 48m
American Airlines
Sat 4/187:05 am
STL
-
OKC
1 stop4h 30m
American Airlines
Deal found 1/25$177
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 2/234:52 pm
OKC
-
ORD
2 stops18h 30m
Multiple Airlines
Mon 3/25:05 am
ORD
-
OKC
1 stop10h 51m
Multiple Airlines
Deal found 1/26$179
This Kiwi.com deal was found by Cheapflights users on 1/24. 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 2/204:52 pm
OKC
-
ORD
1 stop17h 54m
Frontier
Tue 2/246:02 pm
ORD
-
OKC
2 stops48h 15m
Frontier
Deal found 1/24$180
This Frontier deal was found by Cheapflights users on 1/27. 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.
Fri 2/274:52 pm
OKC
-
MDW
1 stop5h 45m
Frontier
Mon 3/26:00 am
MDW
-
OKC
1 stop9h 56m
Frontier
Deal found 1/27$189
This Delta deal was found by Cheapflights users on 1/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/175:33 pm
OKC
-
STL
1 stop6h 03m
Delta
Wed 2/186:00 am
STL
-
OKC
1 stop4h 55m
Delta
Deal found 1/27$191
This Kiwi.com deal was found by Cheapflights users on 1/25. 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 2/268:30 pm
OKC
-
ORD
1 stop16h 55m
Frontier
Tue 3/36:02 pm
ORD
-
OKC
2 stops48h 15m
Frontier
Deal found 1/25$193
This American Airlines deal was found by Cheapflights users on 1/25. 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 3/116:00 am
OKC
-
STL
1 stop6h 43m
American Airlines
Wed 3/185:12 am
STL
-
OKC
1 stop4h 35m
American Airlines
Deal found 1/25$194

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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$134
(Southwest)

One-way from

$68
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$327

Good round-trip deal

$353 or less

Good one-way deal

$214 or less
Provider with most accurate pricing for Oklahoma City Will Rogers World-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Oklahoma City Will Rogers World-Chicago (CHI) flights.
Search Deals
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. 2% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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

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 January 27, 2026.
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 2/17

4:30 pm-5:55 pm

Nonstop1h 25m

Lambert-St Louis

Thu 2/19

9:50 am-11:30 am

Nonstop1h 40m

$134

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Fri 2/27

4:52 pm-10:39 pm

1 stop5h 47m

Chicago O'Hare Intl

Sun 3/1

3:40 pm-3:56 pm

2 stops24h 16m

$172

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Tue 4/14

7:00 pm-11:48 pm

1 stop4h 48m

Lambert-St Louis

Sat 4/18

7:05 am-11:35 am

1 stop4h 30m

$177

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Wed 4/29

11:27 am-5:21 pm

1 stop5h 54m

Lambert-St Louis

Sat 5/2

2:12 pm-10:47 pm

1 stop8h 35m

$177

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Mon 2/23

4:52 pm-11:22 am

2 stops18h 30m

Chicago O'Hare Intl

Mon 3/2

5:05 am-3:56 pm

1 stop10h 51m

$179

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Fri 2/27

4:52 pm-10:37 pm

1 stop5h 45m

Chicago Midway

Mon 3/2

6:00 am-3:56 pm

1 stop9h 56m

$189

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Thu 2/26

7:12 pm-2:54 pm

2 stops19h 42m

Chicago O'Hare Intl

Mon 3/2

5:05 am-3:56 pm

1 stop10h 51m

$190

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Wed 4/15

5:21 am-10:34 am

1 stop5h 13m

Lambert-St Louis

Sat 4/18

11:43 am-4:55 pm

1 stop5h 12m

$191

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Tue 2/17

5:33 pm-11:36 pm

1 stop6h 03m

Lambert-St Louis

Sat 2/21

5:01 pm-11:54 pm

1 stop6h 53m

$191

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Thu 2/19

2:06 pm-8:41 pm

1 stop6h 35m

Lambert-St Louis

Sat 2/21

5:01 pm-11:54 pm

1 stop6h 53m

$191

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 58 results
1
2
3
...
6

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, January is the cheapest month in which you can book a flight from Oklahoma City to Illinois (average of $139). 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 January 27, 2026.

It’s optimal to fly from Oklahoma City to Illinois in the morning. By choosing this option you can save up to 28% 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 January 24, 2026.

Travelers seeking maximum savings on their Oklahoma City to Illinois flight should consider departing on Tuesday at noon 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 January 27, 2026.

The most flights from OKC to USIL are scheduled on a Tuesday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (12 on average).

How much does it cost to fly round-trip from Oklahoma City to Illinois?

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 January 27, 2026.
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.
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,268 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,207 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,198 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,056 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Food

7.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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.

  • How long is the flight from Oklahoma City to Illinois?

    There are many flights that can get you from Oklahoma City to Illinois in 1h 25m. Fly via Southwest, Frontier, or American Airlines to get the fastest option. Airlines will cover a distance of 461 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $73 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and American Airlines, with prices starting from $106 and $114, 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 (94%), Emirates (89%) or United Airlines (85%) 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 $162. While the most popular route (Oklahoma City Will Rogers World - Chicago O'Hare Intl) can be booked for $190 on average, our data indicates $1,190 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, January is the cheapest month in which you can book a flight from Oklahoma City to Illinois (average of $139). 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.

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 John F Kennedy Intl flights
Dallas/Fort Worth to Las Vegas flights
Dallas/Fort Worth to Seattle flights
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to O'Hare Intl flights
Dallas/Fort Worth to Denver flights
Dallas/Fort Worth to Orlando flights
Dallas/Fort Worth to Newark flights
Dallas/Fort Worth to San Francisco flights
Dallas/Fort Worth to Los Angeles flights
Dallas/Fort Worth to Sky Harbor Intl flights
Dallas/Fort Worth to Miami flights
Dallas/Fort Worth to Fort Lauderdale flights
Dallas/Fort Worth to Salt Lake City flights
Dallas/Fort Worth to Boston flights
Dallas/Fort Worth to Dulles Intl flights
Dallas/Fort Worth to San Diego flights
Dallas/Fort Worth to Baltimore flights
Dallas/Fort Worth to Ontario flights
Dallas/Fort Worth to Midway flights
Dallas/Fort Worth to Santa Ana flights
Dallas/Fort Worth to Reagan-National flights
Dallas/Fort Worth to Detroit flights
Dallas/Fort Worth to Tampa flights
Dallas/Fort Worth to Atlanta flights
Dallas/Fort Worth to New Orleans flights
Dallas/Fort Worth to Hobby flights
Dallas/Fort Worth to Honolulu flights
Dallas/Fort Worth to Nashville flights
Dallas/Fort Worth to San Jose flights
Dallas/Fort Worth to Philadelphia flights
Dallas/Fort Worth to Charlotte flights
Dallas/Fort Worth to George Bush Intcntl flights
Dallas/Fort Worth to Minneapolis flights
Dallas/Fort Worth to Raleigh flights
Dallas/Fort Worth to Portland flights
Dallas/Fort Worth to Indianapolis flights
Dallas/Fort Worth to Burbank flights
Oklahoma City to Atlanta flights
Oklahoma City to Las Vegas flights
Dallas/Fort Worth to Sacramento flights
Dallas/Fort Worth to El Paso flights
Dallas/Fort Worth to Fort Myers flights
Dallas/Fort Worth to Jacksonville flights
Dallas/Fort Worth to West Palm Beach flights
Oklahoma City to Orlando flights
Dallas/Fort Worth to Kahului flights
Dallas/Fort Worth to Cincinnati flights
Dallas/Fort Worth to Palm Springs flights
Fayetteville 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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$151Average$238FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$182Average$379FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$241Average$386FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$248Average$374FlexibilityNo cancel feeOn-time71%

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.