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$55+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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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 October 28, 2025.

This Frontier deal was found by Cheapflights users on 10/27. 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.
Thu 12/48:29 pmOKC - STL
1 stop13h 45mFrontier
Mon 12/87:43 pmSTL - OKC
1 stop23h 49mFrontier
Deal found 10/27$110
This Frontier deal was found by Cheapflights users on 10/28. 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 12/48:29 pmOKC - ORD
1 stop27h 43mFrontier
Mon 12/87:00 amORD - OKC
1 stop12h 32mFrontier
Deal found 10/28$111
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:51 pmOKC - STL
1 stop13h 16mFrontier
Sat 11/157:45 pmSTL - OKC
1 stop23h 15mFrontier
Deal found 10/27$119
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:45 pmOKC - STL
1 stop13h 22mFrontier
Tue 11/187:45 pmSTL - OKC
1 stop18h 26mFrontier
Deal found 10/27$152
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/123:42 pmOKC - MDW
1 stop19h 48mFrontier
Sun 11/166:15 amMDW - OKC
1 stop9h 35mFrontier
Deal found 10/28$152
This Booking.com deal was found by Cheapflights users on 10/27. 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.
Sun 12/78:29 pmOKC - STL
1 stop13h 45mFrontier
Thu 12/1112:04 pmSTL - OKC
1 stop5h 20mFrontier
Deal found 10/27$155
This Booking.com deal was found by Cheapflights users on 10/27. 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.
Fri 11/147:45 pmOKC - ORD
1 stop27h 44mFrontier
Mon 11/175:05 amORD - OKC
1 stop10h 44mFrontier
Deal found 10/27$155
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 12/58:29 pmOKC - ORD
2 stops15h 25mFrontier
Mon 12/87:00 amORD - OKC
1 stop12h 32mFrontier
Deal found 10/27$162
This Priceline deal was found by Cheapflights users on 10/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/54:49 pmOKC - MDW
1 stop5h 23mFrontier
Mon 12/812:18 pmMDW - OKC
1 stop7h 14mFrontier
Deal found 10/27$163
This Frontier deal was found by Cheapflights users on 10/27. 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.
Thu 12/48:29 pmOKC - MDW
1 stop14h 39mFrontier
Mon 12/812:18 pmMDW - OKC
1 stop7h 14mFrontier
Deal found 10/27$172
This Frontier deal was found by Cheapflights users on 10/28. 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.
Fri 12/54:49 pmOKC - MDW
1 stop5h 23mFrontier
Sun 12/76:15 amMDW - OKC
1 stop9h 04mFrontier
Deal found 10/28$176
This Frontier deal was found by Cheapflights users on 10/27. 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.
Mon 11/34:57 pmOKC - ORD
1 stop7h 14mFrontier
Sun 11/165:01 amORD - OKC
1 stop10h 49mFrontier
Deal found 10/27$176

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 October 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$110
(Frontier)

One-way from

$55
(Frontier)

Popular in

March

Cheapest in

September

Average price

$353

Good round-trip deal

$375 or less

Good one-way deal

$135 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. 4% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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

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 October 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 12/4

8:29 pm-10:14 am

1 stop13h 45m

Lambert-St Louis

Mon 12/8

7:43 pm-7:32 pm

1 stop23h 49m

$110

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Thu 12/4

8:29 pm-12:12 am

1 stop27h 43m

Chicago O'Hare Intl

Mon 12/8

7:00 am-7:32 pm

1 stop12h 32m

$111

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Fri 11/14

7:45 pm-11:29 pm

1 stop27h 44m

Chicago O'Hare Intl

Mon 11/17

5:05 am-3:49 pm

1 stop10h 44m

$155

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Fri 12/5

8:29 pm-1:59 pm

2 stops17h 30m

Chicago Midway

Mon 12/8

12:18 pm-7:32 pm

1 stop7h 14m

$179

Oklahoma CityChicago

OKC - MDW

OKCMDW

Oklahoma City Will Rogers World

Thu 12/4

8:29 pm-2:04 pm

2 stops17h 35m

Chicago Midway

Mon 12/8

12:18 pm-7:32 pm

1 stop7h 14m

$192

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Fri 11/14

6:40 pm-3:56 pm

1 stop21h 16m

Lambert-St Louis

Sun 11/16

7:45 pm-7:30 pm

1 stop23h 45m

$205

Oklahoma CityChicago

OKC - ORD

OKCORD

Oklahoma City Will Rogers World

Sat 12/13

8:29 pm-12:12 am

1 stop27h 43m

Chicago O'Hare Intl

Tue 12/16

7:20 am-7:32 pm

2 stops12h 12m

$218

Oklahoma CitySt. Louis

OKC - STL

OKCSTL

Oklahoma City Will Rogers World

Sun 11/16

7:45 pm-9:07 am

1 stop13h 22m

Lambert-St Louis

Tue 11/18

7:45 pm-2:11 pm

1 stop18h 26m

$243

Oklahoma CityMoline

OKC - MLI

OKCMLI

Oklahoma City Will Rogers World

Wed 11/19

9:45 am-3:01 pm

1 stop5h 16m

Moline Quad-City

Sun 11/23

11:02 am-3:37 pm

1 stop4h 35m

$249

Oklahoma CityMoline

OKC - MLI

OKCMLI

Oklahoma City Will Rogers World

Wed 2/18

11:25 am-4:26 pm

1 stop5h 01m

Moline Quad-City

Sat 2/21

5:00 pm-11:59 pm

1 stop6h 59m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 60 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, February is the cheapest month in which you can book a flight from Oklahoma City to Illinois (average of $129). Flying from Oklahoma City to Illinois in January is currently the most expensive (average of $265). 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 October 28, 2025.

It’s optimal to fly from Oklahoma City to Illinois in the morning. By choosing this option you can save up to 17% on the cost of your flight, compared to a flight in the afternoon.

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 December 16, 2024.

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.

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 October 28, 2025.
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
4,235 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,235 reviews
Southwest
8.0
Very good
4,235 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,996 reviews
Southwest
8.0
Very good
4,235 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,033 reviews
Southwest
8.0
Very good
4,235 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,122 reviews
Southwest
8.0
Very good
4,235 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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 5h 01m. Fly via Frontier, American Airlines, or Delta to get the fastest option. Airlines will cover a distance of 567 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?

    $123 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $123 and $126, 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 - Lambert-St Louis or Oklahoma City Will Rogers World - Chicago Midway 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 Envoy Air (100%), Air New Zealand (79%) or Lufthansa (76%) 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 $148. While the most popular route (Oklahoma City Will Rogers World - Chicago O'Hare Intl) can be booked for $200 on average, our data indicates $1,238 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, February is the cheapest month in which you can book a flight from Oklahoma City to Illinois (average of $129). Flying from Oklahoma City to Illinois in January is currently the most expensive (average of $265). 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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$118Average$238FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$241Average$378FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$248Average$358FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$270Average$419FlexibilityNo cancel feeOn-time69%

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