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$90+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$199
(American Airlines)

One-way from

$90
(Frontier)

Popular in

March

Cheapest in

April

Average price

$338

Good round-trip deal

$344 or less

Good one-way deal

$179 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. 0% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This Booking.com deal was found by Cheapflights users on 4/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/29:44 amOKC - STL
1 stop14h 30mFrontier
Sun 5/49:55 pmSTL - OKC
1 stop13h 38mFrontier
Deal found 4/30$208
This Southwest deal was found by Cheapflights users on 4/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/281:45 pmOKC - STL
1 stop8h 20mSouthwest
Wed 6/49:05 pmSTL - OKC
Nonstop1h 30mSouthwest
Deal found 4/30$240
This United Airlines deal was found by Cheapflights users on 4/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/285:15 pmOKC - STL
1 stop5h 00mUnited Airlines
Wed 6/411:22 amSTL - OKC
1 stop4h 54mUnited Airlines
Deal found 4/30$243
This American Airlines deal was found by Cheapflights users on 4/29. 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 5/145:20 amOKC - MLI
1 stop5h 22mAmerican Airlines
Sun 5/186:00 amMLI - OKC
1 stop4h 50mAmerican Airlines
Deal found 4/29$259
This Southwest deal was found by Cheapflights users on 4/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/167:00 amOKC - MDW
Nonstop1h 55mSouthwest
Wed 8/2012:45 pmMDW - OKC
1 stop9h 05mSouthwest
Deal found 4/30$279
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2910:27 amOKC - ORD
Nonstop2h 13mAmerican Airlines
Sat 8/25:00 amORD - OKC
1 stop4h 34mAmerican Airlines
Deal found 4/30$279
This Booking.com deal was found by Cheapflights users on 4/29. 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.
Wed 5/218:05 pmOKC - ORD
1 stop27h 47mFrontier
Sun 5/256:00 amORD - OKC
1 stop13h 37mFrontier
Deal found 4/29$280
This Frontier deal was found by Cheapflights users on 4/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/312:24 pmOKC - MDW
1 stop10h 54mFrontier
Sun 7/69:12 pmMDW - OKC
1 stop10h 45mFrontier
Deal found 4/30$282
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/305:55 pmOKC - ORD
Nonstop2h 20mUnited Airlines
Mon 6/29:15 amORD - OKC
Nonstop2h 39mUnited Airlines
Deal found 4/29$285
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/63:42 pmOKC - PIA
1 stop26h 22mAllegiant Air
Sun 6/82:16 pmPIA - OKC
1 stop24h 36mAllegiant Air
Deal found 4/29$286
This Delta deal was found by Cheapflights users on 5/1. 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 7/97:00 amOKC - MDW
1 stop4h 53mDelta
Sat 7/121:46 pmMDW - OKC
1 stop6h 35mDelta
Deal found 5/1$289
This Southwest deal was found by Cheapflights users on 4/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1612:55 pmOKC - ORD
2 stops9h 05mSouthwest
Wed 8/201:50 pmORD - OKC
2 stops8h 20mSouthwest
Deal found 4/30$299

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 May 1, 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

Mon 6/2

8:52 am-11:49 pm

1 stop14h 57m

Lambert-St Louis

Wed 6/4

8:11 pm-7:37 pm

1 stop23h 26m

$230

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Wed 5/28

1:45 pm-10:05 pm

1 stop8h 20m

Lambert-St Louis

Wed 6/4

9:05 pm-10:35 pm

Nonstop1h 30m

$240

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Wed 5/28

5:15 pm-10:15 pm

1 stop5h 00m

Lambert-St Louis

Wed 6/4

11:22 am-4:16 pm

1 stop4h 54m

$243

Oklahoma CityMoline

OKC - MLI

OKCMLI

Oklahoma City Will Rogers World

Wed 5/14

5:20 am-10:42 am

1 stop5h 22m

Moline Quad-City

Sun 5/18

6:00 am-10:50 am

1 stop4h 50m

$259

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Sat 8/16

7:00 am-8:55 am

Nonstop1h 55m

Chicago Midway

Wed 8/20

12:45 pm-9:50 pm

1 stop9h 05m

$279

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Tue 7/29

10:27 am-12:40 pm

Nonstop2h 13m

Chicago O'Hare Intl

Sat 8/2

5:00 am-9:34 am

1 stop4h 34m

$279

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Wed 5/21

8:05 pm-11:52 pm

1 stop27h 47m

Chicago O'Hare Intl

Sun 5/25

6:00 am-7:37 pm

1 stop13h 37m

$280

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Thu 7/3

12:24 pm-11:18 pm

1 stop10h 54m

Chicago Midway

Sun 7/6

9:12 pm-7:57 am

1 stop10h 45m

$282

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Fri 5/30

5:55 pm-8:15 pm

Nonstop2h 20m

Chicago O'Hare Intl

Mon 6/2

9:15 am-11:54 am

Nonstop2h 39m

$285

Oklahoma CityPeoria

OKC - PIA

OKCPIA

Oklahoma City Will Rogers World

Fri 6/6

3:42 pm-6:04 pm

1 stop26h 22m

Greater Peoria

Sun 6/8

2:16 pm-2:52 pm

1 stop24h 36m

$286

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 37 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 $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 May 1, 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 May 1, 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 (5 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 May 1, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest 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.
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Allegiant Air
7.3
Good
734 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Crew

8.5

Boarding

8.1

Food

7.1

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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?

    $90 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Southwest, with prices starting from $95 and $117, 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 Japan Airlines (89%), Emirates (85%) or Republic Airways (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 $161. While the most popular route (Oklahoma City Will Rogers World - Chicago O'Hare Intl) can be booked for $255 on average our data indicates $1,000 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.

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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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$123Average$178FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$208Average$402FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$253Average$421FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$300Average$363FlexibilityNo cancel feeOn-time63%

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