$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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Jun 3 — Jun 101
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Oklahoma City to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Oklahoma City to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Oklahoma City to IllinoisExplore 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 4, 2026.
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 4, 2026.
This Frontier deal was found by Cheapflights users on 5/2. 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.
Sun 5/311:56 pm
OKC
- MDW
1 stop8h 06m
Frontier
Tue 6/26:00 am
MDW
- OKC
1 stop7h 01m
Frontier
Deal found 5/2![Frontier logo]()
$180
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/41:56 pm
OKC
- ORD
1 stop5h 55m
Frontier
Sun 6/76:55 am
ORD
- OKC
1 stop6h 06m
Frontier
Deal found 4/29![Frontier logo]()
$180
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.
Wed 5/201:55 pm
OKC
- ORD
1 stop6h 37m
Frontier
Tue 5/266:55 am
ORD
- OKC
1 stop6h 06m
Frontier
Deal found 4/30![Frontier logo]()
$181
This Frontier deal was found by Cheapflights users on 5/3. 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 5/281:56 pm
OKC
- ORD
1 stop5h 45m
Frontier
Mon 6/19:37 pm
ORD
- OKC
1 stop14h 19m
Frontier
Deal found 5/3![Frontier logo]()
$182
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/141:56 pm
OKC
- ORD
1 stop5h 55m
Frontier
Sun 5/176:50 am
ORD
- OKC
1 stop6h 11m
Frontier
Deal found 4/29![Frontier logo]()
$184
This Priceline deal was found by Cheapflights users on 5/2. 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.
Tue 8/111:48 pm
OKC
- ORD
1 stop6h 05m
Frontier
Tue 8/186:55 am
ORD
- OKC
1 stop5h 58m
Frontier
Deal found 5/2![Frontier logo]()
$190
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:56 pm
OKC
- MDW
1 stop8h 06m
Frontier
Sun 5/246:00 am
MDW
- OKC
1 stop7h 01m
Frontier
Deal found 5/1![Frontier logo]()
$195
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2112:41 pm
OKC
- ORD
1 stop7h 51m
Frontier
Sun 5/246:55 am
ORD
- OKC
1 stop6h 06m
Frontier
Deal found 5/1![Frontier logo]()
$195
This Trip.com deal was found by Cheapflights users on 5/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:29 pm
OKC
- STL
1 stop21h 37m
Frontier
Sun 5/249:06 pm
STL
- OKC
1 stop22h 03m
Frontier
Deal found 5/4![Frontier logo]()
$197
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:56 pm
OKC
- MDW
1 stop8h 06m
Frontier
Thu 6/46:00 am
MDW
- OKC
1 stop7h 01m
Frontier
Deal found 4/29![Frontier logo]()
$201
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:56 pm
OKC
- ORD
1 stop5h 45m
Frontier
Thu 6/46:55 am
ORD
- OKC
1 stop6h 06m
Frontier
Deal found 4/29![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 5/2. 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.
Tue 8/41:48 pm
OKC
- ORD
1 stop6h 05m
Frontier
Mon 8/107:15 am
ORD
- OKC
1 stop11h 25m
Frontier
Deal found 5/2![Frontier logo]()
$204
Best flights from Oklahoma City to IllinoisDiscover carefully curated flight deals from Oklahoma City to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 4, 2026.
Discover carefully curated flight deals from Oklahoma City to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 4, 2026.
This Delta deal was found by Cheapflights users on 5/3. 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.
Tue 6/165:14 pm
OKC
- MLI
1 stop5h 20m
Delta
Tue 6/235:17 pm
MLI
- OKC
1 stop6h 38m
Delta
Deal found 5/3![Delta logo]()
$275
This United Airlines deal was found by Cheapflights users on 5/3. 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 6/178:45 am
OKC
- ORD
Nonstop2h 26m
United Airlines
Tue 6/237:45 pm
ORD
- OKC
Nonstop2h 27m
United Airlines
Deal found 5/3![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 5/2. 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.
Thu 6/42:00 pm
OKC
- STL
2 stops9h 10m
Southwest
Mon 6/87:20 pm
STL
- OKC
1 stop3h 50m
Southwest
Deal found 5/2![Southwest logo]()
$328
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.
Fri 5/155:00 am
OKC
- MLI
1 stop6h 34m
American Airlines
Tue 5/1912:04 pm
MLI
- OKC
1 stop5h 44m
American Airlines
Deal found 4/30![American Airlines logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Wed 7/17:18 pm
OKC
- STL
2 stops22h 12m
Frontier
Tue 7/78:08 pm
STL
- OKC
1 stop22h 23m
Frontier
Deal found 5/3![Frontier logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 5/4. 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.
Thu 5/2812:41 pm
OKC
- PIA
1 stop6h 49m
Multiple Airlines
Sun 5/3111:09 am
PIA
- OKC
2 stops32h 00m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$354
This Southwest deal was found by Cheapflights users on 5/3. 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 6/175:00 am
OKC
- MDW
Nonstop1h 55m
Southwest
Wed 6/1710:15 am
MDW
- OKC
2 stops5h 50m
Southwest
Deal found 5/3![Southwest logo]()
$334
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Sat 5/166:20 pm
OKC
- PIA
1 stop4h 29m
United Airlines
Tue 5/195:30 pm
PIA
- OKC
1 stop5h 00m
United Airlines
Deal found 5/2![United Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 5/3. 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 6/175:51 am
OKC
- ORD
1 stop6h 45m
Delta
Tue 6/235:30 am
ORD
- OKC
1 stop4h 59m
Delta
Deal found 5/3![Delta logo]()
$339
This American Airlines deal was found by Cheapflights users on 5/3. 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 5/197:25 pm
OKC
- BMI
1 stop4h 27m
American Airlines
Sat 5/2312:06 pm
BMI
- OKC
1 stop6h 27m
American Airlines
Deal found 5/3![American Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 5/3. 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 6/175:55 am
OKC
- MDW
2 stops6h 30m
Southwest
Tue 6/239:55 pm
MDW
- OKC
Nonstop2h 00m
Southwest
Deal found 5/3![Southwest logo]()
$334
This Delta deal was found by Cheapflights users on 5/2. 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 6/35:29 pm
OKC
- ORD
1 stop6h 39m
Delta
Wed 6/109:48 am
ORD
- OKC
1 stop6h 41m
Delta
Deal found 5/2![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 5/3. 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.
Mon 6/15:36 pm
OKC
- ORD
Nonstop2h 29m
United Airlines
Mon 6/87:45 pm
ORD
- OKC
Nonstop2h 27m
United Airlines
Deal found 5/3![United Airlines logo]()
$351
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/234:55 pm
OKC
- MDW
1 stop4h 10m
Southwest
Mon 5/2510:05 pm
MDW
- OKC
Nonstop2h 10m
Southwest
Deal found 4/29![Southwest logo]()
$345
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/261:12 pm
OKC
- ORD
1 stop7h 14m
Delta
Sat 5/305:30 am
ORD
- OKC
1 stop5h 57m
Delta
Deal found 4/30![Delta logo]()
$347
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:03 pm
OKC
- MLI
1 stop4h 52m
American Airlines
Sun 5/3111:09 am
MLI
- OKC
1 stop6h 21m
American Airlines
Deal found 5/1![American Airlines logo]()
$387
This Southwest deal was found by Cheapflights users on 5/4. 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 9/82:50 pm
OKC
- STL
2 stops6h 50m
Southwest
Thu 9/108:30 am
STL
- OKC
2 stops6h 50m
Southwest
Deal found 5/4![Southwest logo]()
$353
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.
Wed 8/197:20 am
OKC
- BMI
1 stop5h 30m
United Airlines
Sat 8/221:32 pm
BMI
- OKC
1 stop4h 33m
United Airlines
Deal found 4/29![United Airlines logo]()
$389
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/186:55 pm
OKC
- STL
1 stop4h 04m
American Airlines
Wed 5/205:20 am
STL
- OKC
1 stop5h 17m
American Airlines
Deal found 4/29![American Airlines logo]()
$411
This Delta deal was found by Cheapflights users on 5/3. 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 7/111:57 am
OKC
- ORD
1 stop5h 05m
Delta
Tue 7/73:55 pm
ORD
- OKC
1 stop4h 28m
Delta
Deal found 5/3![Delta logo]()
$376
This Southwest deal was found by Cheapflights users on 5/3. 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.
Mon 6/153:50 pm
OKC
- MDW
Nonstop1h 50m
Southwest
Tue 6/309:55 pm
MDW
- OKC
Nonstop2h 00m
Southwest
Deal found 5/3![Southwest logo]()
$356
This United Airlines deal was found by Cheapflights users on 5/3. 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 6/25:36 pm
OKC
- ORD
Nonstop2h 29m
United Airlines
Wed 6/312:45 pm
ORD
- OKC
Nonstop2h 32m
United Airlines
Deal found 5/3![United Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 5/2. 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.
Tue 6/307:15 am
OKC
- ORD
1 stop4h 16m
Delta
Tue 7/73:55 pm
ORD
- OKC
1 stop4h 28m
Delta
Deal found 5/2![Delta logo]()
$376
This American Airlines deal was found by Cheapflights users on 5/3. 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.
Fri 6/127:04 pm
OKC
- EVV
1 stop5h 17m
American Airlines
Fri 6/195:30 pm
EVV
- OKC
1 stop5h 35m
American Airlines
Deal found 5/3![American Airlines logo]()
$427
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/511:31 am
OKC
- PIA
1 stop24h 28m
Multiple Airlines
Fri 7/1712:49 pm
PIA
- OKC
2 stops29h 42m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$590
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Sat 5/164:25 pm
OKC
- MLI
1 stop6h 09m
United Airlines
Sat 5/238:10 am
MLI
- OKC
1 stop7h 08m
United Airlines
Deal found 5/2![United Airlines logo]()
$404
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/257:50 am
OKC
- MDW
2 stops9h 20m
Southwest
Sat 8/2910:10 am
MDW
- OKC
Nonstop2h 05m
Southwest
Deal found 5/1![Southwest logo]()
$371
This Delta deal was found by Cheapflights users on 5/3. 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.
Thu 7/235:49 am
OKC
- STL
1 stop6h 28m
Delta
Sun 7/266:21 am
STL
- OKC
1 stop4h 37m
Delta
Deal found 5/3![Delta logo]()
$381
This United Airlines deal was found by Cheapflights users on 5/2. 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 6/25:07 pm
OKC
- STL
1 stop6h 50m
United Airlines
Wed 6/311:10 am
STL
- OKC
1 stop7h 05m
United Airlines
Deal found 5/2![United Airlines logo]()
$407
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.
Mon 6/83:50 pm
OKC
- MDW
Nonstop1h 50m
Southwest
Thu 6/115:15 am
MDW
- OKC
1 stop5h 35m
Southwest
Deal found 4/30![Southwest logo]()
$374
Last-minute flights from Oklahoma City to IllinoisDiscover last-minute flight deals from Oklahoma City to Illinois. Data last updated May 4, 2026 and is based on user searches.
Discover last-minute flight deals from Oklahoma City to Illinois. Data last updated May 4, 2026 and is based on user searches.
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/71:56 pm
OKC
- ORD
1 stop5h 55m
Frontier
Sun 5/106:50 am
ORD
- OKC
1 stop6h 11m
Frontier
Deal found 4/29![Frontier logo]()
$222
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/141:56 pm
OKC
- ORD
1 stop5h 55m
Frontier
Sun 5/176:50 am
ORD
- OKC
1 stop6h 11m
Frontier
Deal found 4/29![Frontier logo]()
$184
This Trip.com deal was found by Cheapflights users on 5/4. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:29 pm
OKC
- STL
1 stop21h 37m
Frontier
Sun 5/249:06 pm
STL
- OKC
1 stop22h 03m
Frontier
Deal found 5/4![Frontier logo]()
$197
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.
Wed 5/201:55 pm
OKC
- ORD
1 stop6h 37m
Frontier
Tue 5/266:55 am
ORD
- OKC
1 stop6h 06m
Frontier
Deal found 4/30![Frontier logo]()
$181
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:56 pm
OKC
- MDW
1 stop8h 06m
Frontier
Sun 5/246:00 am
MDW
- OKC
1 stop7h 01m
Frontier
Deal found 5/1![Frontier logo]()
$195
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2112:41 pm
OKC
- ORD
1 stop7h 51m
Frontier
Sun 5/246:55 am
ORD
- OKC
1 stop6h 06m
Frontier
Deal found 5/1![Frontier logo]()
$195
This Priceline deal was found by Cheapflights users on 5/2. 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.
Thu 5/2112:41 pm
OKC
- ORD
1 stop7h 51m
Frontier
Tue 5/266:55 am
ORD
- OKC
1 stop6h 06m
Frontier
Deal found 5/2![Frontier logo]()
$220
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:56 pm
OKC
- ORD
1 stop5h 45m
Frontier
Thu 6/46:55 am
ORD
- OKC
1 stop6h 06m
Frontier
Deal found 5/1![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 5/3. 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 5/281:56 pm
OKC
- ORD
1 stop5h 45m
Frontier
Mon 6/19:37 pm
ORD
- OKC
1 stop14h 19m
Frontier
Deal found 5/3![Frontier logo]()
$182
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:56 pm
OKC
- MDW
1 stop8h 06m
Frontier
Thu 6/46:00 am
MDW
- OKC
1 stop7h 01m
Frontier
Deal found 4/29![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 5/2. 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.
Sun 5/311:56 pm
OKC
- MDW
1 stop8h 06m
Frontier
Thu 6/46:00 am
MDW
- OKC
1 stop7h 01m
Frontier
Deal found 5/2![Frontier logo]()
$180
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/311:56 pm
OKC
- MDW
1 stop8h 06m
Frontier
Tue 6/26:00 am
MDW
- OKC
1 stop7h 01m
Frontier
Deal found 4/30![Frontier logo]()
$225
One-way flights from Oklahoma City to IllinoisSearch for one-way flight options from Oklahoma City to Illinois. Find affordable one-way fares based on user searches. Data last updated May 4, 2026.
Search for one-way flight options from Oklahoma City to Illinois. Find affordable one-way fares based on user searches. Data last updated May 4, 2026.
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/412:41 pm
OKC
- STL
1 stop6h 42m
Frontier
Deal found 5/1![Frontier logo]()
$90
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:56 pm
OKC
- MDW
1 stop8h 06m
Frontier
Deal found 5/1![Frontier logo]()
$90
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 5/281:56 pm
OKC
- ORD
1 stop5h 45m
Frontier
Deal found 4/30![Frontier logo]()
$90
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/281:48 pm
OKC
- MDW
1 stop8h 20m
Frontier
Deal found 4/29![Frontier logo]()
$95
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/301:51 pm
OKC
- ORD
1 stop5h 59m
Frontier
Deal found 5/1![Frontier logo]()
$95
This Expedia deal was found by Cheapflights users on 5/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:04 pm
OKC
- STL
1 stop21h 30m
Frontier
Deal found 5/3![Frontier logo]()
$98
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/247:18 pm
OKC
- ORD
1 stop25h 25m
Frontier
Deal found 4/30![Frontier logo]()
$98
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Tue 6/163:49 pm
OKC
- STL
1 stop27h 34m
Frontier
Deal found 5/3![Frontier logo]()
$104
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/81:55 pm
OKC
- ORD
1 stop6h 37m
Frontier
Deal found 4/29![Frontier logo]()
$111
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/261:48 pm
OKC
- MDW
1 stop8h 20m
Frontier
Deal found 4/29![Frontier logo]()
$115
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.
Tue 6/161:51 pm
OKC
- ORD
1 stop5h 59m
Frontier
Deal found 4/30![Frontier logo]()
$115
This Frontier deal was found by Cheapflights users on 5/3. 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 5/141:56 pm
OKC
- MDW
1 stop8h 06m
Frontier
Deal found 5/3![Frontier logo]()
$116
Find 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 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $180 (Frontier) |
One-way from | $90 (Priceline) |
Popular in | March |
Cheapest in | September |
Average price | $393 |
Good round-trip deal | $388 or less |
Good one-way deal | $228 or less |
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 4, 2026.
Use the filters below to find and compare flights from Oklahoma City to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Oklahoma CityMoline
OKC - MLI
OKCMLI
Oklahoma City Will Rogers World
Tue 6/16
5:14 pm-10:34 pm
1 stop5h 20m
Moline Quad-City
Tue 6/23
5:17 pm-11:55 pm
1 stop6h 38m
$275
Oklahoma CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Wed 6/17
8:45 am-11:11 am
Nonstop2h 26m
Chicago O'Hare Intl
Tue 6/23
7:45 pm-10:12 pm
Nonstop2h 27m
$319
Oklahoma CitySt. Louis
OKC - STL
OKCSTL
Oklahoma City Will Rogers World
Thu 6/4
2:00 pm-11:10 pm
2 stops9h 10m
Lambert-St Louis
Mon 6/8
7:20 pm-11:10 pm
1 stop3h 50m
$328
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Wed 6/17
5:00 am-6:55 am
Nonstop1h 55m
Chicago Midway
Wed 6/17
10:15 am-4:05 pm
2 stops5h 50m
$334
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Wed 6/17
5:55 am-12:25 pm
2 stops6h 30m
Chicago Midway
Tue 6/23
9:55 pm-11:55 pm
Nonstop2h 00m
$334
Oklahoma CityMoline
OKC - MLI
OKCMLI
Oklahoma City Will Rogers World
Fri 5/15
5:00 am-11:34 am
1 stop6h 34m
Moline Quad-City
Tue 5/19
12:04 pm-5:48 pm
1 stop5h 44m
$339
Oklahoma CityPeoria
OKC - PIA
OKCPIA
Oklahoma City Will Rogers World
Sat 5/16
6:20 pm-10:49 pm
1 stop4h 29m
Greater Peoria
Tue 5/19
5:30 pm-10:30 pm
1 stop5h 00m
$339
Oklahoma CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Wed 6/17
5:51 am-12:36 pm
1 stop6h 45m
Chicago O'Hare Intl
Tue 6/23
5:30 am-10:29 am
1 stop4h 59m
$339
Oklahoma CityBloomington
OKC - BMI
OKCBMI
Oklahoma City Will Rogers World
Tue 5/19
7:25 pm-11:52 pm
1 stop4h 27m
Bloomington-Normal
Sat 5/23
12:06 pm-6:33 pm
1 stop6h 27m
$339
Oklahoma CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Wed 6/3
5:29 pm-12:08 am
1 stop6h 39m
Chicago O'Hare Intl
Wed 6/10
9:48 am-4:29 pm
1 stop6h 41m
$339
Showing 1-10 of 60 resultsSorted by cheapest first
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.
OKC-MDW
OKC-ORD
OKC-STL
OKC-MLI
OKC-PIA
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
OKC-USIL
OKC-MDW
OKC-ORD
OKC-STL
OKC-MLI
How far ahead should I book a flight from Oklahoma City to Illinois?
The best time to book flights from Oklahoma City to Illinois is 47 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Oklahoma City to Illinois?
Currently, July is the cheapest month in which you can book a flight from Oklahoma City to Illinois (average of $84). Flying from Oklahoma City to Illinois in May is currently the most expensive (average of $162). 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 4, 2026.
It’s optimal to fly from Oklahoma City to Illinois in the morning. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight in the evening.
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 May 2, 2026.
Travelers seeking maximum savings on their Oklahoma City to Illinois flight should consider departing on Tuesday afternoons 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.
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 4, 2026.
The most flights from OKC to USIL are scheduled on a Monday (30 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (25 on average).
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 May 4, 2026.
Peruse reviews from past customers who have flown with Southwest,United Airlines, andAmerican 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.
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for Oklahoma City to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Oklahoma City to Illinois by cabin class
Find flights from Oklahoma City to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Oklahoma City and Illinois flights
Browse other Oklahoma City and Illinois flight options. Last updated on May 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Oklahoma City to Illinois flights
Consider these flights traveling from Oklahoma City to Illinois.
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 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$138 | Average$200 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$240 | Average$397 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$245 | Average$411 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$386 | FlexibilityNo cancel fee | On-time69% |