$79 Find Cheap Flights from Oklahoma City to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Oklahoma City to Illinois departing on 5/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Oklahoma City to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Oklahoma City to Illinois, as well as popular online travel agencies
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Best Illinois Flight Deals from Oklahoma City

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Chicago
Chicago1 stop$208
Moline
Moline1 stop$517
Bloomington
Bloomington1 stop$392
St. Louis
St. Louis1 stop$178

Cheap Flight Deals from Oklahoma City to Illinois (OKC-USIL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Oklahoma City to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Oklahoma City to Illinois

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Oklahoma City to Illinois.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
8:27 pm - 9:06 amOKC-STL
12h 39m1 stop
6:51 pm - 7:38 pmSTL-OKC
24h 47m1 stop
$178Frontier
Find Deal
Fri, Apr 18 - Mon, Apr 21
9:44 am - 11:32 pmOKC-ORD
13h 48m1 stop
4:15 pm - 9:33 amORD-OKC
17h 18m1 stop
$208Frontier
Find Deal
Fri, May 2 - Sun, May 4
6:00 am - 10:26 amOKC-STL
4h 26m1 stop
5:26 am - 9:24 amSTL-OKC
3h 58m1 stop
$247American Airlines
Find Deal
Wed, Apr 23 - Sat, Apr 26
2:25 pm - 9:00 pmOKC-STL
6h 35m2 stops
5:40 am - 11:05 amSTL-OKC
5h 25m1 stop
$252Southwest
Find Deal
Tue, Jun 10 - Sat, Jun 14
5:30 pm - 6:55 pmOKC-STL
1h 25mnonstop
5:40 am - 11:05 amSTL-OKC
5h 25m1 stop
$255Southwest
Find Deal
Tue, Jun 10 - Sat, Jun 14
6:32 pm - 10:45 pmOKC-STL
4h 13m1 stop
5:29 pm - 10:55 pmSTL-OKC
5h 26m1 stop
$283American Airlines
Find Deal
Sat, May 24 - Mon, Jun 16
11:23 am - 6:58 pmOKC-ORD
7h 35m1 stop
5:30 am - 12:52 pmORD-OKC
7h 22m1 stop
$307Delta
Find Deal
Wed, Apr 23 - Wed, May 7
5:00 am - 3:47 pmOKC-STL
10h 47m2 stops
5:35 pm - 10:15 pmSTL-OKC
4h 40m1 stop
$312United Airlines
Find Deal
Fri, Apr 18 - Mon, Apr 21
5:00 am - 12:20 pmOKC-STL
7h 20m2 stops
10:40 am - 6:13 pmSTL-OKC
7h 33m2 stops
$317United Airlines
Find Deal
Wed, Apr 23 - Sat, Apr 26
5:52 am - 12:03 pmOKC-MDW
6h 11m1 stop
1:16 pm - 8:37 pmMDW-OKC
7h 21m1 stop
$360Delta
Find Deal
Wed, Apr 16 - Sat, Apr 19

KAYAK's insights & trends for Oklahoma City to Illinois flights

Get data-powered insights and trends into flights from Oklahoma City to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Oklahoma City to Illinois flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Oklahoma City to Illinois.
The cheapest ticket to Illinois from Oklahoma City found in the last 72 hours was to Chicago, at $293 round-trip. The most popular route is from Oklahoma City (OKC) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $293.

What is the cheapest time of day to fly to Illinois?

The average price for all round-trip flights from Oklahoma City to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $562 on average. Morning departures are around 19% cheaper than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,039.

Can I save money by flying with a layover from Oklahoma City to Illinois?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.
No, with an average price for the route of $723, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Oklahoma City to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Oklahoma City to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Oklahoma City to Illinois is April, when tickets cost $287 (return) on average. On the other hand, the most expensive months are March and January, when the average cost of round-trip tickets is $387 and $379 respectively.

What’s the cheapest day of the week to fly from Oklahoma City to Illinois?

The average price of all round-trip flights from Oklahoma City to Illinois clicked on KAYAK for each day over the last 12 months.
When flying from Oklahoma City to Illinois, you should consider leaving on a Thursday and avoid Sundays if you are looking for the best rates. For your return to Oklahoma City, you’ll find the best rates on Saturdays and the most expensive ones on Mondays.

How far in advance should I book a flight from Oklahoma City to Illinois?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Oklahoma City to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from Oklahoma City to Illinois, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Good to know

Low season

January

High season

July

Cheapest flight

$79
Best time to beat the crowds but there is an average 13% increase in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Oklahoma City to St. Louis

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Oklahoma City to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Oklahoma City to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Oklahoma City to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Oklahoma City to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Oklahoma City to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Oklahoma City to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Oklahoma City to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Oklahoma City to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Oklahoma City to the following destinations at these prices or less: Chicago $208 one-way - $362 round-trip; Chicago $236 one-way - $436 round-trip; St. Louis $179 one-way - $346 round-trip

Top 4 airlines serving from Oklahoma City to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Oklahoma City to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Oklahoma City to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4275 reviews
8.7Crew
8.2Boarding
7.6Entertainment
8.1Comfort
7.1Food
Airline reviews

1.5 hour delay, poor service, no compassion from the crew. Terrible experience

2.0 MediocreAndre, Mar 2025DEN - LIT
Read more Southwest reviews

1.5 hour delay, poor service, no compassion from the crew. Terrible experience

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Short flight with plenty of open seats. Drinks and snacks were still provided even on such a short flight. <1 hr

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Very good. Sad to learn Southwest is going start to charge for bags

Our flight was diverted from being a non-stop to getting within 150 miles and requiring another plane. We heard 4 or 5 different versions from SW as to why we had to stop, then wait for a replacement plane. Five hour delay, weather did not come up as a single excuse.... communication was not clear and well explained. No one really took charge!

My flight to Chicago left and landed early. My return flight left two minutes late and arrived 2 minutes late. My seat selections were ideal! There were no snacks going to Chicago and no snacks on the return trip. There are no charging outlets on board.

WiFi on the flight was not working. Thus, entertainment options were limited.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

There's just no way to sit fully upright and comfortably in these seats. There needs to be 2 more inches of room, and that's not something that only one person on the flight needs - the whole flight needs 2 more inches of room. If that means you sell 6 less seats, so be it. It's too close for anyone. Forcing people to pay for "premium" economy just to get "barely enough space to breathe" isn't really an answer to that.

The crew were very nice. The Chocolate is good and v there’s no entertainment. Thanks

The crew were very nice. I would have appreciated a pillow for comfort. I had a special meal that was sloppy, but the salad was great. Thanks

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

Flight was delayed two hours. No snacks and no tv screens. My bag got stuck in Chicago

The aircrew was solid, the flight was chill, I had no issues. The gate agent was not the best. I was trying to use a military bag upgrade to move my bag from under the seat to the overhead bins and he told me there’s no overhead bins on the plane, argued with me why booking put a military member in basic economy (I don’t really understand this) and made it an issue to even try to help me stating I’d have to call reservations to get a bag upgrade. When every other agent with United can add it at the gate, this man couldn’t be bothered.

They canceled our flight and left us stranded to figure it out

Everything was very good. Was able to change a make run flight leaving on direct earlier in the app -seamless!!! Well done

Being stick waiting for gate at ORD cause me to almost miss my connecting flight…being deaf United made no no effort to keep me updated as I couldn’t hear the PA

The plane was late and then sat on the runway for almost 45 minutes before taking off.

Crew professional. Easy bag drop off. On time. Good entertainment.

Everything was great. Boarding, early departure, early arrival, and deplaning were smooth. Smooth flight.

Per usual, flight status, staff courtesy and professionalism were excellent

Everything was on time, we arrived early, everything worked well.

The only thing is if Wi-Fi is available after you land and taxi to the gate. It takes forever to get to the gate, and having the Wi-Fi continue would be great to bide the time at least 5 minutes before you arrive at the entrance. That is my only comment; otherwise, everything was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

Seating was horrible. Small seats. Access to flight information and extras very iser unfriendly. Kept losing internet after paying for it. Staff in madison was as unprofessional and unhelpful.

Delayed due to no crew. On a major holiday travel day.

Other than being delayed 5.5 hours and having to get a hotel because I missed my connecting flight, it was an okay flight. No in-flight Wi-Fi or entertainment.

The worst flight of my life. Never will I fly frontier again

Landing in terminal 2, but my luggage is terminal 3. We (and others) were looking for it in terminal 1. We probably missed the crew broadcast, but the communication could have been clearer for non native (or elderly) passengers.

I chose the seats when booked the flight and paid for them. However after checking in I found we were assigned different seats!

Bag should not be so much money. This is how Frontier takes advantage of customers

The plane was comfortable. The time to board was way too slow and very unorganized! The crew was not as friendly as normally. The was not a single time that they offered water nor anything!!!

They switched my flight to Spirit, Never using Kayak again,

i was denied boarding, even though i had an assigned seat, checked in on line and was at airport early. Then they refused to fully refund the the fair and replacement fair because they claimed it was "no show/denied boarding". I will never fly this airline again

I was not permitted on my flight and had to purchase another flight ticket to Las Vegas.

This was a full flight and I was in Zone 1, however upon boarding, several other zones went in ahead of me, leaving no overhead cabin space near my seat. This created a challenging disembarkment process.

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Everything you need to know for your flight from Oklahoma City to Illinois

Information on your arrival and departure airports

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