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$50+ Cheap flights from Oklahoma 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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
abr. 22 — abr. 291
mar. 4/22
mar. 4/29
1 adult, Economy
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Cheap flight deals from Oklahoma to Illinois

Keep the following information in mind while searching for Oklahoma to Illinois flight deals. Data was last updated abril 17, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$99
(Cheapflightsfares)

One-way from

$50
(Booking.com)

Popular in

March

Cheapest in

April

Average price

$287

Good round-trip deal

$326 or less

Good one-way deal

$189 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 to Illinois
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One-way flight from Oklahoma to Illinois
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High demand for flights, 5% 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 April 2025
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Price to beat on a round-trip flight from Oklahoma to Illinois.
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Price to beat on a one-way flight from Oklahoma to Illinois.
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Find flight deals from Oklahoma to Illinois

Cheapest flights from Oklahoma to Illinois
Explore the most affordable flight options available from Oklahoma to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 17, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/16. 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.
lun. 5/126:40 pmDFW - ORD
1 stop14h 10mSpirit Airlines
vie. 5/168:15 pmORD - DFW
Nonstop2h 42mSpirit Airlines
Deal found 4/16$99
This Vliegwinkel deal was found by Cheapflights users on 4/16. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/119:29 amDFW - ORD
Nonstop2h 33mFrontier
dom. 5/185:45 amORD - DFW
Nonstop2h 49mFrontier
Deal found 4/16$100
This FlightHub deal was found by Cheapflights users on 4/17. 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.
jue. 5/86:00 amDFW - ORD
1 stop10h 03mMultiple Airlines
dom. 5/115:45 amORD - DFW
Nonstop2h 49mMultiple Airlines
Deal found 4/17$101
This Kiwi.com deal was found by Cheapflights users on 4/17. 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.
mié. 8/62:40 pmDFW - MDW
Nonstop2h 23mFrontier
sáb. 8/98:05 amMDW - DFW
Nonstop2h 27mFrontier
Deal found 4/17$116
This United Airlines deal was found by Cheapflights users on 4/16. 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.
sáb. 5/105:35 pmDFW - ORD
Nonstop2h 32mUnited Airlines
mar. 5/131:11 pmORD - DFW
Nonstop2h 47mUnited Airlines
Deal found 4/16$147
This American Airlines deal was found by Cheapflights users on 4/17. 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.
sáb. 5/105:14 pmDFW - ORD
Nonstop2h 26mAmerican Airlines
dom. 5/115:00 amORD - DFW
Nonstop2h 36mAmerican Airlines
Deal found 4/17$149
This Delta deal was found by Cheapflights users on 4/17. 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.
sáb. 5/104:17 pmDFW - MDW
1 stop4h 57mDelta
mar. 5/134:15 pmMDW - DFW
1 stop7h 44mDelta
Deal found 4/17$197
This Frontier deal was found by Cheapflights users on 4/17. 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.
vie. 4/259:47 pmDFW - STL
1 stop12h 14mFrontier
dom. 4/279:55 pmSTL - DFW
1 stop13h 25mFrontier
Deal found 4/17$198
This CheapOair deal was found by Cheapflights users on 4/17. 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.
dom. 4/275:20 amDFW - STL
1 stop11h 55mMultiple Airlines
sáb. 5/38:15 pmSTL - DFW
1 stop12h 19mMultiple Airlines
Deal found 4/17$201
This Delta deal was found by Cheapflights users on 4/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/2111:37 amDFW - ORD
1 stop4h 53mDelta
sáb. 5/315:30 amORD - DFW
1 stop4h 56mDelta
Deal found 4/15$207
This American Airlines deal was found by Cheapflights users on 4/17. 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.
sáb. 7/1910:30 pmDFW - STL
1 stop9h 26mAmerican Airlines
dom. 7/2010:08 amSTL - DFW
Nonstop1h 52mAmerican Airlines
Deal found 4/17$227
This American Airlines deal was found by Cheapflights users on 4/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/207:24 pmTUL - ORD
Nonstop2h 04mAmerican Airlines
mié. 5/288:10 amORD - TUL
Nonstop1h 59mAmerican Airlines
Deal found 4/15$239

Cheapflights Fare Finder

Customize your flight search to find flights from Oklahoma 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 abril 17, 2025.
Use the filters below to find and compare flights from Oklahoma to Illinois that are best for you.

Fly from

Oklahoma

Fly to

Illinois

Route

Depart

Return

Price

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

lun. 5/12

6:40 pm-8:50 am

1 stop14h 10m

Chicago O'Hare Intl

vie. 5/16

8:15 pm-10:57 pm

Nonstop2h 42m

$99

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

dom. 5/11

9:29 am-12:02 pm

Nonstop2h 33m

Chicago O'Hare Intl

dom. 5/18

5:45 am-8:34 am

Nonstop2h 49m

$100

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

jue. 5/8

6:00 am-4:03 pm

1 stop10h 03m

Chicago O'Hare Intl

dom. 5/11

5:45 am-8:34 am

Nonstop2h 49m

$101

DallasChicago

DFW - MDW

DFWMDW

Dallas/Fort Worth

mié. 8/6

2:40 pm-5:03 pm

Nonstop2h 23m

Chicago Midway

sáb. 8/9

8:05 am-10:32 am

Nonstop2h 27m

$116

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

sáb. 5/10

2:47 pm-5:12 pm

Nonstop2h 25m

Chicago O'Hare Intl

sáb. 5/10

6:45 pm-9:33 pm

Nonstop2h 48m

$142

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

sáb. 5/10

5:35 pm-8:07 pm

Nonstop2h 32m

Chicago O'Hare Intl

mar. 5/13

1:11 pm-3:58 pm

Nonstop2h 47m

$147

DallasChicago

DFW - MDW

DFWMDW

Dallas/Fort Worth

sáb. 5/10

4:17 pm-9:14 pm

1 stop4h 57m

Chicago Midway

mar. 5/13

4:15 pm-11:59 pm

1 stop7h 44m

$197

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

jue. 5/1

12:26 pm-9:05 pm

1 stop8h 39m

Lambert-St Louis

dom. 5/4

9:55 pm-5:47 am

1 stop7h 52m

$198

DallasSt. Louis

DFW - STL

DFWSTL

Dallas/Fort Worth

dom. 4/27

5:20 am-5:15 pm

1 stop11h 55m

Lambert-St Louis

sáb. 5/3

8:15 pm-8:34 am

1 stop12h 19m

$201

DallasChicago

DFW - ORD

DFWORD

Dallas/Fort Worth

mié. 5/21

11:37 am-4:30 pm

1 stop4h 53m

Chicago O'Hare Intl

sáb. 5/31

5:30 am-10:26 am

1 stop4h 56m

$207

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 60 results
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Best time to book a flight from Oklahoma to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Oklahoma 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 to Illinois

What is the cheapest month to book a flight from Oklahoma to Illinois?

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

Find hourly flight availability from Oklahoma 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 abril 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Oklahoma to Illinois as you normally would.

Weekly flight availability from Oklahoma to Illinois

Explore weekly flight availability from Oklahoma 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 abril 17, 2025.

The most flights from USOK to USIL are scheduled on a Thursday (26 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 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 abril 17, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Oklahoma to Illinois. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,887 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,887 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,916 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,667 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Allegiant Air
7.3
Good
734 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

Find useful and relevant information for your journey from Oklahoma to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    One-way options have recently been found by users for as low as $50 on Spirit Airlines. Other airlines that offer cheap prices include Frontier from $54 and United Airlines from $74 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Oklahoma 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 to Illinois?

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

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Alternative routes for Oklahoma 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 to Illinois

Discover the top 4 airlines that operate flights from Oklahoma 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 abril 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$123Average$178FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$205Average$361FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$208Average$416FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$278Average$368FlexibilityNo cancel feeOn-time63%

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