$114+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Jul 16 — Jul 231
Round-trip
1 adult, Economy
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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 June 16, 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 June 16, 2026.
This United Airlines deal was found by Cheapflights users on 6/11. 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 10/275:45 pm
OKC
- ORD
Nonstop2h 29m
United Airlines
Tue 11/32:15 pm
ORD
- OKC
Nonstop2h 32m
United Airlines
Deal found 6/11![United Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 6/11. 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 9/295:45 am
OKC
- MDW
Nonstop2h 00m
Southwest
Tue 10/68:45 pm
MDW
- OKC
Nonstop2h 05m
Southwest
Deal found 6/11![Southwest logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 10/271:56 pm
OKC
- ORD
1 stop20h 05m
Frontier
Tue 11/32:46 pm
ORD
- OKC
2 stops22h 15m
Frontier
Deal found 6/12![Frontier logo]()
$235
This Booking.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:16 pm
OKC
- STL
1 stop24h 07m
Frontier
Tue 7/148:08 pm
STL
- OKC
1 stop22h 23m
Frontier
Deal found 6/12![Frontier logo]()
$242
This Delta deal was found by Cheapflights users on 6/11. 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 10/2711:55 am
OKC
- ORD
1 stop7h 39m
Delta
Tue 11/31:15 pm
ORD
- OKC
1 stop7h 25m
Delta
Deal found 6/11![Delta logo]()
$247
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1612:36 pm
OKC
- ORD
Nonstop2h 24m
American Airlines
Sat 9/1911:54 am
ORD
- OKC
Nonstop2h 20m
American Airlines
Deal found 6/11![American Airlines logo]()
$252
This Southwest deal was found by Cheapflights users on 6/11. 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 9/165:45 am
OKC
- MDW
Nonstop2h 00m
Southwest
Sat 9/196:25 pm
MDW
- OKC
Nonstop2h 05m
Southwest
Deal found 6/11![Southwest logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 8/184:09 pm
OKC
- ORD
1 stop28h 44m
Frontier
Sun 8/239:48 pm
ORD
- OKC
1 stop17h 36m
Frontier
Deal found 6/11![Frontier logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/103:44 pm
OKC
- STL
1 stop27h 39m
Multiple Airlines
Wed 8/127:03 pm
STL
- OKC
1 stop15h 38m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$256
This Frontier deal was found by Cheapflights users on 6/11. 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 8/67:24 pm
OKC
- ORD
1 stop10h 13m
Frontier
Mon 8/109:57 pm
ORD
- OKC
1 stop20h 34m
Frontier
Deal found 6/11![Frontier logo]()
$258
This American Airlines deal was found by Cheapflights users on 6/11. 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 10/275:00 am
OKC
- ORD
1 stop7h 13m
American Airlines
Tue 11/33:29 pm
ORD
- OKC
Nonstop2h 24m
American Airlines
Deal found 6/11![American Airlines logo]()
$262
This Trip.com deal was found by Cheapflights users on 6/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:24 pm
OKC
- STL
1 stop22h 51m
Frontier
Wed 7/298:08 pm
STL
- OKC
1 stop18h 51m
Frontier
Deal found 6/15![Frontier logo]()
$268
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 June 16, 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 June 16, 2026.
This Delta deal was found by Cheapflights users on 6/11. 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 10/2711:55 am
OKC
- ORD
1 stop7h 39m
Delta
Tue 11/31:15 pm
ORD
- OKC
1 stop7h 25m
Delta
Deal found 6/11![Delta logo]()
$247
This Gotogate deal was found by Cheapflights users on 6/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/273:44 pm
OKC
- STL
1 stop27h 39m
Frontier
Mon 8/38:08 pm
STL
- OKC
1 stop22h 23m
Frontier
Deal found 6/12![Frontier logo]()
$277
This Southwest deal was found by Cheapflights users on 6/11. 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 10/135:00 am
OKC
- STL
1 stop4h 00m
Southwest
Fri 10/165:55 pm
STL
- OKC
1 stop5h 35m
Southwest
Deal found 6/11![Southwest logo]()
$291
This American Airlines deal was found by Cheapflights users on 6/13. 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.
Sat 7/117:16 pm
OKC
- BMI
1 stop5h 19m
American Airlines
Sat 7/185:00 am
BMI
- OKC
1 stop5h 34m
American Airlines
Deal found 6/13![American Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 6/11. 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 8/295:45 pm
OKC
- MLI
1 stop5h 29m
United Airlines
Tue 9/15:40 am
MLI
- OKC
2 stops10h 27m
United Airlines
Deal found 6/11![United Airlines logo]()
$360
This Southwest deal was found by Cheapflights users on 6/11. 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 8/195:45 am
OKC
- MDW
Nonstop2h 00m
Southwest
Sun 8/2310:15 am
MDW
- OKC
Nonstop2h 05m
Southwest
Deal found 6/11![Southwest logo]()
$311
This Delta deal was found by Cheapflights users on 6/13. 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 12/25:20 pm
OKC
- MDW
1 stop4h 50m
Delta
Sat 12/510:35 am
MDW
- OKC
1 stop6h 13m
Delta
Deal found 6/13![Delta logo]()
$329
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:15 am
OKC
- MDW
Nonstop1h 50m
Southwest
Mon 8/108:55 pm
MDW
- OKC
Nonstop2h 00m
Southwest
Deal found 6/15![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:00 am
OKC
- MLI
2 stops7h 51m
United Airlines
Sat 11/145:42 pm
MLI
- OKC
1 stop4h 24m
United Airlines
Deal found 6/15![United Airlines logo]()
$360
This American Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:38 pm
OKC
- MLI
2 stops7h 30m
American Airlines
Mon 8/1711:32 am
MLI
- OKC
1 stop4h 21m
American Airlines
Deal found 6/14![American Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 6/13. 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 12/21:00 pm
OKC
- ORD
1 stop8h 10m
Delta
Sat 12/57:10 am
ORD
- OKC
1 stop5h 14m
Delta
Deal found 6/13![Delta logo]()
$329
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/215:55 am
OKC
- STL
1 stop4h 50m
Southwest
Tue 7/214:00 pm
STL
- OKC
1 stop7h 00m
Southwest
Deal found 6/15![Southwest logo]()
$326
This Delta deal was found by Cheapflights users on 6/15. 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.
Sat 8/811:40 am
OKC
- ORD
1 stop6h 01m
Delta
Wed 8/1210:33 am
ORD
- OKC
1 stop5h 53m
Delta
Deal found 6/15![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:02 pm
OKC
- STL
1 stop6h 02m
United Airlines
Wed 8/125:30 pm
STL
- OKC
1 stop5h 26m
United Airlines
Deal found 6/15![United Airlines logo]()
$367
This American Airlines deal was found by Cheapflights users on 6/14. 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.
Thu 7/167:30 pm
OKC
- BMI
1 stop5h 05m
American Airlines
Fri 7/244:30 pm
BMI
- OKC
1 stop6h 03m
American Airlines
Deal found 6/14![American Airlines logo]()
$398
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:00 am
OKC
- MDW
Nonstop1h 50m
Southwest
Mon 9/211:05 pm
MDW
- OKC
2 stops9h 05m
Southwest
Deal found 6/15![Southwest logo]()
$332
This United Airlines deal was found by Cheapflights users on 6/12. 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 8/185:00 am
OKC
- STL
2 stops10h 38m
United Airlines
Wed 8/195:10 am
STL
- OKC
1 stop5h 40m
United Airlines
Deal found 6/12![United Airlines logo]()
$372
This Southwest deal was found by Cheapflights users on 6/11. 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 7/1810:25 am
OKC
- MDW
2 stops6h 30m
Southwest
Sat 9/1210:10 am
MDW
- OKC
Nonstop2h 05m
Southwest
Deal found 6/11![Southwest logo]()
$333
This American Airlines deal was found by Cheapflights users on 6/15. 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.
Fri 7/37:30 pm
OKC
- PIA
1 stop4h 52m
American Airlines
Tue 7/79:50 am
PIA
- OKC
2 stops9h 50m
American Airlines
Deal found 6/15![American Airlines logo]()
$418
This United Airlines deal was found by Cheapflights users on 6/14. 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 11/1012:35 pm
OKC
- ORD
Nonstop2h 17m
United Airlines
Wed 11/119:25 am
ORD
- OKC
Nonstop2h 21m
United Airlines
Deal found 6/14![United Airlines logo]()
$381
This Southwest deal was found by Cheapflights users on 6/14. 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 8/115:45 am
OKC
- MDW
Nonstop2h 00m
Southwest
Sun 8/169:15 pm
MDW
- OKC
Nonstop2h 00m
Southwest
Deal found 6/14![Southwest logo]()
$347
This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:30 am
OKC
- PIA
1 stop6h 01m
United Airlines
Sat 11/147:00 am
PIA
- OKC
1 stop4h 46m
United Airlines
Deal found 6/15![United Airlines logo]()
$384
This American Airlines deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:00 am
OKC
- MLI
1 stop4h 39m
American Airlines
Sun 8/26:08 am
MLI
- OKC
1 stop4h 26m
American Airlines
Deal found 6/13![American Airlines logo]()
$455
This United Airlines deal was found by Cheapflights users on 6/12. 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 11/77:10 am
OKC
- BMI
1 stop5h 40m
United Airlines
Tue 11/109:44 am
BMI
- OKC
1 stop7h 03m
United Airlines
Deal found 6/12![United Airlines logo]()
$389
This Southwest deal was found by Cheapflights users on 6/12. 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 8/131:10 pm
OKC
- STL
2 stops6h 45m
Southwest
Sun 8/168:25 am
STL
- OKC
2 stops8h 35m
Southwest
Deal found 6/12![Southwest logo]()
$358
This Southwest deal was found by Cheapflights users on 6/11. 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 6/305:00 am
OKC
- MDW
Nonstop1h 55m
Southwest
Fri 7/39:30 pm
MDW
- OKC
Nonstop2h 00m
Southwest
Deal found 6/11![Southwest logo]()
$359
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 7/98:45 am
OKC
- ORD
Nonstop2h 26m
United Airlines
Fri 7/1012:45 pm
ORD
- OKC
Nonstop2h 32m
United Airlines
Deal found 6/11![United Airlines logo]()
$415
This Southwest deal was found by Cheapflights users on 6/11. 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 8/277:40 am
OKC
- MDW
2 stops9h 20m
Southwest
Sun 8/309:15 pm
MDW
- OKC
Nonstop2h 00m
Southwest
Deal found 6/11![Southwest logo]()
$363
This American Airlines deal was found by Cheapflights users on 6/15. 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.
Mon 8/245:00 am
OKC
- MLI
1 stop6h 02m
American Airlines
Wed 8/266:00 am
MLI
- OKC
1 stop4h 36m
American Airlines
Deal found 6/15![American Airlines logo]()
$537
This Delta deal was found by Cheapflights users on 6/14. 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.
Mon 7/277:00 am
OKC
- EVV
1 stop6h 02m
Delta
Fri 7/3110:06 am
EVV
- OKC
1 stop6h 16m
Delta
Deal found 6/14![Delta logo]()
$615
Last-minute flights from Oklahoma City to IllinoisDiscover last-minute flight deals from Oklahoma City to Illinois. Data last updated June 16, 2026 and is based on user searches.
Discover last-minute flight deals from Oklahoma City to Illinois. Data last updated June 16, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 6/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/23:49 pm
OKC
- STL
1 stop27h 04m
Frontier
Tue 7/78:08 pm
STL
- OKC
1 stop22h 23m
Frontier
Deal found 6/15![Frontier logo]()
$289
This Booking.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:16 pm
OKC
- STL
1 stop24h 07m
Frontier
Tue 7/148:08 pm
STL
- OKC
1 stop22h 23m
Frontier
Deal found 6/12![Frontier logo]()
$242
This Trip.com deal was found by Cheapflights users on 6/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/97:24 pm
OKC
- STL
1 stop22h 51m
Frontier
Tue 7/148:08 pm
STL
- OKC
1 stop22h 23m
Frontier
Deal found 6/15![Frontier logo]()
$272
This Booking.com deal was found by Cheapflights users on 6/12. 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.
Thu 7/97:24 pm
OKC
- ORD
1 stop10h 13m
Frontier
Tue 7/219:57 pm
ORD
- OKC
1 stop20h 34m
Frontier
Deal found 6/12![Frontier logo]()
$275
This Trip.com deal was found by Cheapflights users on 6/14. 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 7/97:24 pm
OKC
- ORD
1 stop10h 13m
Frontier
Wed 8/59:57 pm
ORD
- OKC
1 stop17h 02m
Frontier
Deal found 6/14![Frontier logo]()
$277
This Trip.com deal was found by Cheapflights users on 6/13. 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 7/97:24 pm
OKC
- ORD
1 stop10h 13m
Frontier
Mon 7/139:57 pm
ORD
- OKC
1 stop20h 34m
Frontier
Deal found 6/13![Frontier logo]()
$282
This Booking.com deal was found by Cheapflights users on 6/11. 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.
Thu 7/97:24 pm
OKC
- ORD
1 stop10h 13m
Frontier
Fri 7/109:57 pm
ORD
- OKC
1 stop20h 34m
Frontier
Deal found 6/11![Frontier logo]()
$284
This Booking.com deal was found by Cheapflights users on 6/12. 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.
Thu 7/167:24 pm
OKC
- ORD
1 stop10h 13m
Frontier
Mon 7/209:57 pm
ORD
- OKC
1 stop20h 34m
Frontier
Deal found 6/12![Frontier logo]()
$280
This Trip.com deal was found by Cheapflights users on 6/11. 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.
Tue 7/217:16 pm
OKC
- ORD
1 stop25h 36m
Frontier
Tue 7/289:57 pm
ORD
- OKC
1 stop20h 34m
Frontier
Deal found 6/11![Frontier logo]()
$276
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2112:20 pm
OKC
- STL
1 stop5h 40m
Southwest
Wed 7/226:00 pm
STL
- OKC
1 stop5h 00m
Southwest
Deal found 6/15![Southwest logo]()
$287
This Trip.com deal was found by Cheapflights users on 6/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:24 pm
OKC
- STL
1 stop22h 51m
Frontier
Wed 7/298:08 pm
STL
- OKC
1 stop18h 51m
Frontier
Deal found 6/15![Frontier logo]()
$268
This Gotogate deal was found by Cheapflights users on 6/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/273:44 pm
OKC
- STL
1 stop27h 39m
Frontier
Mon 8/38:08 pm
STL
- OKC
1 stop22h 23m
Frontier
Deal found 6/12![Frontier logo]()
$277
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 June 16, 2026.
Search for one-way flight options from Oklahoma City to Illinois. Find affordable one-way fares based on user searches. Data last updated June 16, 2026.
This Southwest deal was found by Cheapflights users on 6/11. 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 9/85:45 am
OKC
- MDW
Nonstop2h 00m
Southwest
Deal found 6/11![Southwest logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 8/57:16 pm
OKC
- ORD
1 stop25h 36m
Frontier
Deal found 6/11![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 8/117:16 pm
OKC
- MDW
2 stops20h 34m
Frontier
Deal found 6/12![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 8/127:16 pm
OKC
- ORD
1 stop25h 36m
Frontier
Deal found 6/12![Frontier logo]()
$123
This Southwest deal was found by Cheapflights users on 6/11. 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 12/810:55 am
OKC
- MDW
2 stops6h 10m
Southwest
Deal found 6/11![Southwest logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 8/117:16 pm
OKC
- ORD
2 stops34h 21m
Frontier
Deal found 6/12![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 6/13. 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 9/84:09 pm
OKC
- ORD
1 stop29h 26m
Frontier
Deal found 6/13![Frontier logo]()
$128
This Frontier deal was found by Cheapflights users on 6/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/101:56 pm
OKC
- ORD
1 stop7h 39m
Frontier
Deal found 6/16![Frontier logo]()
$129
This Frontier deal was found by Cheapflights users on 6/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/97:24 pm
OKC
- ORD
1 stop10h 13m
Frontier
Deal found 6/16![Frontier logo]()
$134
This Expedia deal was found by Cheapflights users on 6/14. 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.
Wed 9/301:56 pm
OKC
- ORD
1 stop20h 05m
Frontier
Deal found 6/14![Frontier logo]()
$135
This Priceline deal was found by Cheapflights users on 6/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:24 pm
OKC
- ORD
1 stop10h 13m
Frontier
Deal found 6/16![Frontier logo]()
$137
This Trip.com deal was found by Cheapflights users on 6/12. 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.
Tue 7/217:16 pm
OKC
- ORD
1 stop25h 36m
Frontier
Deal found 6/12![Frontier logo]()
$139
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 June 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $227 (United Airlines) |
One-way from | $114 (Southwest) |
Popular in | June |
Cheapest in | September |
Average price | $443 |
Good round-trip deal | $398 or less |
Good one-way deal | $229 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 June 16, 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 CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Tue 10/27
11:55 am-7:34 pm
1 stop7h 39m
Chicago O'Hare Intl
Tue 11/3
1:15 pm-8:40 pm
1 stop7h 25m
$247
Oklahoma CitySt. Louis
OKC - STL
OKCSTL
Oklahoma City Will Rogers World
Mon 7/27
3:44 pm-7:23 pm
1 stop27h 39m
Lambert-St Louis
Mon 8/3
8:08 pm-6:31 pm
1 stop22h 23m
$277
Oklahoma CitySt. Louis
OKC - STL
OKCSTL
Oklahoma City Will Rogers World
Tue 10/13
5:00 am-9:00 am
1 stop4h 00m
Lambert-St Louis
Fri 10/16
5:55 pm-11:30 pm
1 stop5h 35m
$291
Oklahoma CityBloomington
OKC - BMI
OKCBMI
Oklahoma City Will Rogers World
Sat 7/11
7:16 pm-12:35 am
1 stop5h 19m
Bloomington-Normal
Sat 7/18
5:00 am-10:34 am
1 stop5h 34m
$309
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Wed 8/19
5:45 am-7:45 am
Nonstop2h 00m
Chicago Midway
Sun 8/23
10:15 am-12:20 pm
Nonstop2h 05m
$311
Quickest round-trip
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Thu 8/6
5:15 am-7:05 am
Nonstop1h 50m
Chicago Midway
Mon 8/10
8:55 pm-10:55 pm
Nonstop2h 00m
$317
Oklahoma CitySt. Louis
OKC - STL
OKCSTL
Oklahoma City Will Rogers World
Tue 7/21
5:55 am-10:45 am
1 stop4h 50m
Lambert-St Louis
Tue 7/21
4:00 pm-11:00 pm
1 stop7h 00m
$326
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Wed 12/2
5:20 pm-10:10 pm
1 stop4h 50m
Chicago Midway
Sat 12/5
10:35 am-4:48 pm
1 stop6h 13m
$329
Oklahoma CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Wed 12/2
1:00 pm-9:10 pm
1 stop8h 10m
Chicago O'Hare Intl
Sat 12/5
7:10 am-12:24 pm
1 stop5h 14m
$329
Oklahoma CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Sat 8/8
11:40 am-5:41 pm
1 stop6h 01m
Chicago O'Hare Intl
Wed 8/12
10:33 am-4:26 pm
1 stop5h 53m
$329
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-STL
OKC-ORD
OKC-MDW
OKC-EVV
OKC-BMI
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-STL
OKC-ORD
OKC-MDW
OKC-EVV
What is the cheapest month to book a flight from Oklahoma City to Illinois?
Currently, November is the cheapest month in which you can book a flight from Oklahoma City to Illinois (average of $118). Flying from Oklahoma City to Illinois in June is currently the most expensive (average of $209). 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 June 16, 2026.
It’s optimal to fly from Oklahoma City to Illinois in the morning. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight at noon.
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 June 16, 2026.
The most flights from OKC to USIL are scheduled on a Monday (30 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (30 on average).
How much does it cost to fly round-trip from Oklahoma City to Illinois?
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 77 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 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 June 13, 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. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 June 16, 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.
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.5
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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.
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Alternative routes for Oklahoma City to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
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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 June 16, 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 June 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$182 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$217 | Average$421 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$245 | Average$445 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$395 | FlexibilityNo cancel fee | On-time69% |