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$79+ 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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$168
(Booking.com)

One-way from

$79
(Frontier)

Popular in

March

Cheapest in

April

Average price

$387

Good round-trip deal

$362 or less

Good one-way deal

$208 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 City Will Rogers World to Illinois
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One-way flight from Oklahoma City Will Rogers World to Illinois
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High demand for flights, 4% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Oklahoma City Will Rogers World to Illinois.
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Price to beat on a one-way flight from Oklahoma City Will Rogers World to Illinois.
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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 March 28, 2025.

This Booking.com deal was found by Cheapflights users on 3/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/248:28 pmOKC - STL
1 stop13h 33mFrontier
Thu 5/19:55 pmSTL - OKC
1 stop13h 38mFrontier
Deal found 3/27$168
This Booking.com deal was found by Cheapflights users on 3/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/74:32 pmOKC - MDW
1 stop12h 51mFrontier
Thu 4/106:45 amMDW - OKC
1 stop12h 46mFrontier
Deal found 3/27$238
This Frontier deal was found by Cheapflights users on 3/27. 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 4/118:27 pmOKC - ORD
1 stop16h 50mFrontier
Wed 4/166:40 amORD - OKC
1 stop12h 51mFrontier
Deal found 3/27$238
This Delta deal was found by Cheapflights users on 3/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/175:55 amOKC - STL
1 stop6h 59mDelta
Wed 1/147:05 pmSTL - OKC
1 stop4h 54mDelta
Deal found 3/26$247
This Southwest deal was found by Cheapflights users on 3/27. 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 4/225:05 pmOKC - STL
1 stop5h 05mSouthwest
Mon 5/59:40 pmSTL - OKC
Nonstop1h 30mSouthwest
Deal found 3/27$255
This Southwest deal was found by Cheapflights users on 3/27. 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.
Wed 4/163:05 pmOKC - MDW
Nonstop1h 55mSouthwest
Sat 4/198:35 pmMDW - OKC
Nonstop2h 05mSouthwest
Deal found 3/27$283
This United Airlines deal was found by Cheapflights users on 3/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/231:25 pmOKC - ORD
Nonstop2h 18mUnited Airlines
Wed 4/307:40 pmORD - OKC
Nonstop2h 35mUnited Airlines
Deal found 3/26$283
This United Airlines deal was found by Cheapflights users on 3/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/237:32 amOKC - PIA
1 stop6h 25mUnited Airlines
Thu 4/245:21 pmPIA - OKC
1 stop4h 54mUnited Airlines
Deal found 3/26$300
This United Airlines deal was found by Cheapflights users on 3/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/275:15 pmOKC - STL
1 stop5h 00mUnited Airlines
Thu 5/296:30 amSTL - OKC
1 stop5h 24mUnited Airlines
Deal found 3/27$301
This American Airlines deal was found by Cheapflights users on 3/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/85:00 amOKC - STL
1 stop4h 54mAmerican Airlines
Mon 5/125:19 amSTL - OKC
1 stop4h 00mAmerican Airlines
Deal found 3/26$303
This American Airlines deal was found by Cheapflights users on 3/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/168:01 amOKC - ORD
1 stop7h 20mAmerican Airlines
Sat 4/198:15 amORD - OKC
1 stop5h 58mAmerican Airlines
Deal found 3/26$303
This Southwest deal was found by Cheapflights users on 3/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2311:15 amOKC - ORD
1 stop5h 30mSouthwest
Wed 4/307:30 amORD - OKC
2 stops8h 40mSouthwest
Deal found 3/26$308

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 March 28, 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

Thu 4/24

8:28 pm-10:01 am

1 stop13h 33m

Lambert-St Louis

Thu 5/1

9:55 pm-11:33 am

1 stop13h 38m

$168

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Mon 4/7

4:32 pm-5:23 am

1 stop12h 51m

Chicago Midway

Thu 4/10

6:45 am-7:31 pm

1 stop12h 46m

$238

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Fri 4/11

8:27 pm-1:17 pm

1 stop16h 50m

Chicago O'Hare Intl

Wed 4/16

6:40 am-7:31 pm

1 stop12h 51m

$238

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Thu 4/10

1:05 pm-8:15 pm

1 stop7h 10m

Lambert-St Louis

Mon 4/14

5:32 pm-11:51 pm

1 stop6h 19m

$247

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Tue 4/22

5:05 pm-10:10 pm

1 stop5h 05m

Lambert-St Louis

Mon 5/5

9:40 pm-11:10 pm

Nonstop1h 30m

$255

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Wed 4/23

1:25 pm-3:43 pm

Nonstop2h 18m

Chicago O'Hare Intl

Wed 4/30

7:40 pm-10:15 pm

Nonstop2h 35m

$283

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Wed 4/16

3:05 pm-5:00 pm

Nonstop1h 55m

Chicago Midway

Sat 4/19

8:35 pm-10:40 pm

Nonstop2h 05m

$283

Oklahoma CityPeoria

OKC - PIA

OKCPIA

Oklahoma City Will Rogers World

Wed 4/23

10:15 am-3:03 pm

1 stop4h 48m

Greater Peoria

Thu 4/24

6:21 am-10:51 am

1 stop4h 30m

$300

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Tue 5/27

5:15 pm-10:15 pm

1 stop5h 00m

Lambert-St Louis

Thu 5/29

6:30 am-11:54 am

1 stop5h 24m

$301

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Thu 5/8

5:00 am-9:54 am

1 stop4h 54m

Lambert-St Louis

Mon 5/12

5:19 am-9:19 am

1 stop4h 00m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 38 results
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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 $323). 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 March 28, 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 March 28, 2025.

The most flights from OKC to USIL are scheduled on a Thursday (24 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 March 28, 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from Oklahoma City to Illinois. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,896 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Allegiant Air
7.3
Good
731 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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?

    $79 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Allegiant Air and Delta, with prices starting from $117 and $124, 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 Air Canada (87%), Emirates (87%) or Lufthansa (87%) 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 $143. While the most popular route (Oklahoma City Will Rogers World - Chicago O'Hare Intl) can be booked for $281 on average our data indicates $2,011 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 $323). 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.

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Alternative routes for Oklahoma City 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 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$123Average$178FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$208Average$471FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$208Average$415FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$300Average$363FlexibilityNo cancel feeOn-time63%
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