$69+ 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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Apr 15 — Apr 221
Round-trip
1 adult, Economy
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Find cheap flights from Oklahoma City to Illinois with Cheapflights
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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 March 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 March 16, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/12. 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.
Thu 4/28:30 pm
OKC
- STL
1 stop13h 18m
Frontier
Fri 4/38:16 pm
STL
- OKC
1 stop23h 29m
Frontier
Deal found 3/12![Frontier logo]()
$164
This Priceline deal was found by Cheapflights users on 3/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:05 pm
OKC
- MDW
1 stop5h 14m
Frontier
Mon 4/276:00 am
MDW
- OKC
1 stop8h 21m
Frontier
Deal found 3/13![Frontier logo]()
$180
This Priceline deal was found by Cheapflights users on 3/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:05 pm
OKC
- ORD
1 stop5h 34m
Frontier
Mon 4/275:50 am
ORD
- OKC
1 stop8h 31m
Frontier
Deal found 3/13![Frontier logo]()
$180
This Gotogate deal was found by Cheapflights users on 3/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:29 pm
OKC
- STL
1 stop23h 03m
Frontier
Sun 4/199:55 pm
STL
- OKC
1 stop14h 40m
Frontier
Deal found 3/13![Frontier logo]()
$189
This Gotogate deal was found by Cheapflights users on 3/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/21:56 pm
OKC
- ORD
1 stop5h 55m
Frontier
Wed 6/39:42 pm
ORD
- OKC
1 stop14h 14m
Frontier
Deal found 3/14![Frontier logo]()
$189
This Mytrip deal was found by Cheapflights users on 3/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/43:06 pm
OKC
- ORD
1 stop7h 33m
Frontier
Wed 5/69:42 pm
ORD
- OKC
1 stop14h 14m
Frontier
Deal found 3/13![Frontier logo]()
$190
This Booking.com deal was found by Cheapflights users on 3/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:29 pm
OKC
- STL
1 stop23h 03m
Frontier
Mon 5/48:17 pm
STL
- OKC
1 stop15h 39m
Frontier
Deal found 3/15![Frontier logo]()
$191
This Expedia deal was found by Cheapflights users on 3/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:05 pm
OKC
- MDW
1 stop5h 14m
Frontier
Sun 4/2610:53 am
MDW
- OKC
1 stop5h 26m
Frontier
Deal found 3/13![Frontier logo]()
$201
This Frontier deal was found by Cheapflights users on 3/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:25 pm
OKC
- ORD
1 stop10h 55m
Frontier
Thu 4/165:50 am
ORD
- OKC
1 stop10h 20m
Frontier
Deal found 3/15![Frontier logo]()
$201
This Mytrip deal was found by Cheapflights users on 3/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:30 pm
OKC
- ORD
1 stop28h 08m
Frontier
Mon 4/132:29 pm
ORD
- OKC
1 stop28h 16m
Frontier
Deal found 3/12![Frontier logo]()
$210
This Booking.com deal was found by Cheapflights users on 3/12. 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.
Sun 4/128:30 pm
OKC
- STL
1 stop13h 18m
Frontier
Fri 4/178:06 pm
STL
- OKC
1 stop21h 22m
Frontier
Deal found 3/12![Frontier logo]()
$213
This Frontier deal was found by Cheapflights users on 3/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/21:56 pm
OKC
- ORD
1 stop5h 55m
Frontier
Tue 6/97:05 am
ORD
- OKC
1 stop12h 21m
Frontier
Deal found 3/12![Frontier logo]()
$222
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 March 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 March 16, 2026.
This Gotogate deal was found by Cheapflights users on 3/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/58:30 pm
OKC
- STL
1 stop13h 18m
Frontier
Wed 4/88:16 pm
STL
- OKC
1 stop23h 29m
Frontier
Deal found 3/13![Frontier logo]()
$264
This Southwest deal was found by Cheapflights users on 3/10. 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 5/510:40 am
OKC
- STL
2 stops9h 40m
Southwest
Wed 5/610:25 am
STL
- OKC
2 stops11h 35m
Southwest
Deal found 3/10![Southwest logo]()
$305
This American Airlines deal was found by Cheapflights users on 3/14. 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 4/85:49 pm
OKC
- MLI
1 stop6h 05m
American Airlines
Sat 4/1812:51 pm
MLI
- OKC
2 stops10h 07m
American Airlines
Deal found 3/14![American Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Mon 6/84:11 pm
OKC
- ORD
Nonstop2h 29m
United Airlines
Wed 6/103:35 pm
ORD
- OKC
Nonstop2h 30m
United Airlines
Deal found 3/11![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 3/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/111:14 am
OKC
- STL
1 stop6h 39m
Delta
Fri 4/34:21 pm
STL
- OKC
1 stop7h 37m
Delta
Deal found 3/12![Delta logo]()
$379
This Southwest deal was found by Cheapflights users on 3/12. 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.
Wed 6/33:05 pm
OKC
- MDW
Nonstop1h 50m
Southwest
Thu 6/410:10 am
MDW
- OKC
Nonstop2h 05m
Southwest
Deal found 3/12![Southwest logo]()
$309
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/276:37 pm
OKC
- MLI
1 stop4h 16m
American Airlines
Mon 3/301:30 pm
MLI
- OKC
2 stops9h 14m
American Airlines
Deal found 3/12![American Airlines logo]()
$324
This United Airlines deal was found by Cheapflights users on 3/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2112:35 pm
OKC
- MLI
1 stop5h 26m
United Airlines
Mon 8/242:29 pm
MLI
- OKC
2 stops8h 45m
United Airlines
Deal found 3/13![United Airlines logo]()
$334
This Southwest deal was found by Cheapflights users on 3/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/115:00 am
OKC
- MDW
Nonstop1h 50m
Southwest
Tue 4/1410:10 am
MDW
- OKC
1 stop7h 55m
Southwest
Deal found 3/13![Southwest logo]()
$319
This American Airlines deal was found by Cheapflights users on 3/11. 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.
Thu 3/265:53 pm
OKC
- MLI
1 stop5h 44m
American Airlines
Mon 3/301:30 pm
MLI
- OKC
2 stops9h 14m
American Airlines
Deal found 3/11![American Airlines logo]()
$324
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Wed 4/1510:25 am
OKC
- ORD
Nonstop2h 19m
United Airlines
Fri 4/174:20 pm
ORD
- OKC
Nonstop2h 41m
United Airlines
Deal found 3/12![United Airlines logo]()
$348
This Southwest deal was found by Cheapflights users on 3/14. 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.
Mon 4/65:30 am
OKC
- STL
1 stop4h 05m
Southwest
Wed 4/86:40 pm
STL
- OKC
1 stop4h 10m
Southwest
Deal found 3/14![Southwest logo]()
$333
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Fri 4/174:38 pm
OKC
- ORD
Nonstop2h 19m
United Airlines
Tue 4/219:24 am
ORD
- OKC
Nonstop2h 39m
United Airlines
Deal found 3/12![United Airlines logo]()
$348
This American Airlines deal was found by Cheapflights users on 3/11. 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 6/167:03 pm
OKC
- MLI
1 stop4h 52m
American Airlines
Tue 6/2311:09 am
MLI
- OKC
1 stop6h 10m
American Airlines
Deal found 3/11![American Airlines logo]()
$358
This Southwest deal was found by Cheapflights users on 3/11. 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 4/257:20 am
OKC
- ORD
1 stop7h 10m
Southwest
Sat 5/22:05 pm
ORD
- OKC
1 stop6h 40m
Southwest
Deal found 3/11![Southwest logo]()
$335
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Wed 4/14:38 pm
OKC
- STL
1 stop5h 14m
United Airlines
Wed 4/88:21 am
STL
- OKC
2 stops9h 51m
United Airlines
Deal found 3/11![United Airlines logo]()
$364
This Southwest deal was found by Cheapflights users on 3/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/117:05 am
OKC
- ORD
1 stop8h 25m
Southwest
Tue 4/142:40 pm
ORD
- OKC
2 stops7h 20m
Southwest
Deal found 3/13![Southwest logo]()
$340
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/144:38 pm
OKC
- STL
1 stop5h 14m
United Airlines
Sat 4/188:21 am
STL
- OKC
2 stops11h 21m
United Airlines
Deal found 3/12![United Airlines logo]()
$366
This Southwest deal was found by Cheapflights users on 3/15. 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 4/93:40 pm
OKC
- MDW
1 stop5h 20m
Southwest
Mon 4/1310:05 pm
MDW
- OKC
Nonstop2h 10m
Southwest
Deal found 3/15![Southwest logo]()
$345
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Wed 4/155:00 am
OKC
- STL
2 stops7h 22m
United Airlines
Sat 4/1811:15 am
STL
- OKC
1 stop7h 46m
United Airlines
Deal found 3/12![United Airlines logo]()
$366
This Southwest deal was found by Cheapflights users on 3/15. 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.
Wed 4/151:15 pm
OKC
- MDW
1 stop6h 20m
Southwest
Mon 4/2010:05 pm
MDW
- OKC
Nonstop2h 10m
Southwest
Deal found 3/15![Southwest logo]()
$345
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Fri 4/171:55 pm
OKC
- MLI
2 stops10h 02m
United Airlines
Mon 4/201:55 pm
MLI
- OKC
2 stops9h 10m
United Airlines
Deal found 3/14![United Airlines logo]()
$371
This Southwest deal was found by Cheapflights users on 3/12. 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 4/27:50 am
OKC
- STL
2 stops6h 40m
Southwest
Fri 4/35:15 am
STL
- OKC
1 stop6h 40m
Southwest
Deal found 3/12![Southwest logo]()
$351
This United Airlines deal was found by Cheapflights users on 3/10. 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 4/147:30 am
OKC
- PIA
1 stop6h 38m
United Airlines
Sat 4/188:50 am
PIA
- OKC
1 stop7h 41m
United Airlines
Deal found 3/10![United Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 3/11. 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.
Mon 6/82:00 pm
OKC
- ORD
1 stop9h 55m
Southwest
Wed 6/106:00 am
ORD
- OKC
2 stops13h 00m
Southwest
Deal found 3/11![Southwest logo]()
$351
This United Airlines deal was found by Cheapflights users on 3/11. 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 3/314:33 pm
OKC
- MLI
1 stop6h 12m
United Airlines
Sat 4/46:30 am
MLI
- OKC
1 stop6h 39m
United Airlines
Deal found 3/11![United Airlines logo]()
$384
This Southwest deal was found by Cheapflights users on 3/11. 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 4/164:00 pm
OKC
- MDW
Nonstop1h 50m
Southwest
Sun 4/199:45 pm
MDW
- OKC
Nonstop2h 10m
Southwest
Deal found 3/11![Southwest logo]()
$354
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Fri 3/277:33 am
OKC
- PIA
1 stop5h 10m
United Airlines
Tue 3/312:50 pm
PIA
- OKC
1 stop7h 31m
United Airlines
Deal found 3/12![United Airlines logo]()
$389
This Southwest deal was found by Cheapflights users on 3/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/205:00 am
OKC
- STL
1 stop4h 05m
Southwest
Thu 4/233:50 pm
STL
- OKC
2 stops7h 35m
Southwest
Deal found 3/13![Southwest logo]()
$361
This American Airlines deal was found by Cheapflights users on 3/14. 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.
Mon 3/3010:28 am
OKC
- EVV
1 stop4h 52m
American Airlines
Fri 4/36:30 am
EVV
- OKC
1 stop7h 16m
American Airlines
Deal found 3/14![American Airlines logo]()
$735
Last-minute flights from Oklahoma City to IllinoisDiscover last-minute flight deals from Oklahoma City to Illinois. Data last updated March 16, 2026 and is based on user searches.
Discover last-minute flight deals from Oklahoma City to Illinois. Data last updated March 16, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/12. 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.
Thu 4/28:30 pm
OKC
- STL
1 stop13h 18m
Frontier
Fri 4/38:16 pm
STL
- OKC
1 stop23h 29m
Frontier
Deal found 3/12![Frontier logo]()
$164
This Mytrip deal was found by Cheapflights users on 3/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:30 pm
OKC
- ORD
1 stop28h 08m
Frontier
Mon 4/132:29 pm
ORD
- OKC
1 stop28h 16m
Frontier
Deal found 3/12![Frontier logo]()
$210
This Booking.com deal was found by Cheapflights users on 3/12. 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.
Sun 4/128:30 pm
OKC
- STL
1 stop13h 18m
Frontier
Fri 4/178:06 pm
STL
- OKC
1 stop21h 22m
Frontier
Deal found 3/12![Frontier logo]()
$213
This Frontier deal was found by Cheapflights users on 3/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:25 pm
OKC
- ORD
1 stop10h 55m
Frontier
Thu 4/165:50 am
ORD
- OKC
1 stop10h 20m
Frontier
Deal found 3/15![Frontier logo]()
$201
This Gotogate deal was found by Cheapflights users on 3/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:29 pm
OKC
- STL
1 stop23h 03m
Frontier
Sun 4/199:55 pm
STL
- OKC
1 stop14h 40m
Frontier
Deal found 3/13![Frontier logo]()
$189
This Expedia deal was found by Cheapflights users on 3/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:07 pm
OKC
- ORD
1 stop12h 01m
Frontier
Sun 4/198:58 pm
ORD
- OKC
1 stop15h 37m
Frontier
Deal found 3/15![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 3/12. 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.
Sat 4/186:23 pm
OKC
- ORD
1 stop15h 22m
Frontier
Tue 4/213:27 pm
ORD
- OKC
2 stops27h 18m
Frontier
Deal found 3/12![Frontier logo]()
$226
This Gotogate deal was found by Cheapflights users on 3/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:30 pm
OKC
- STL
1 stop23h 51m
Frontier
Mon 4/278:17 pm
STL
- OKC
1 stop22h 28m
Frontier
Deal found 3/15![Frontier logo]()
$234
This Priceline deal was found by Cheapflights users on 3/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:05 pm
OKC
- MDW
1 stop5h 14m
Frontier
Mon 4/276:00 am
MDW
- OKC
1 stop8h 21m
Frontier
Deal found 3/13![Frontier logo]()
$180
This Priceline deal was found by Cheapflights users on 3/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:05 pm
OKC
- ORD
1 stop5h 34m
Frontier
Mon 4/275:50 am
ORD
- OKC
1 stop8h 31m
Frontier
Deal found 3/13![Frontier logo]()
$180
This Expedia deal was found by Cheapflights users on 3/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/235:05 pm
OKC
- MDW
1 stop5h 14m
Frontier
Sun 4/2610:53 am
MDW
- OKC
1 stop5h 26m
Frontier
Deal found 3/13![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/287:30 pm
OKC
- ORD
2 stops14h 53m
Multiple Airlines
Tue 5/59:42 pm
ORD
- OKC
1 stop15h 28m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$240
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 March 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 March 16, 2026.
This Trip.com deal was found by Cheapflights users on 3/13. 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.
Wed 5/131:55 pm
OKC
- ORD
1 stop6h 42m
Frontier
Deal found 3/13![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 5/1212:41 pm
OKC
- ORD
1 stop7h 56m
Frontier
Deal found 3/13![Frontier logo]()
$73
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 4/78:30 pm
OKC
- STL
1 stop13h 18m
Frontier
Deal found 3/11![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Thu 4/98:30 pm
OKC
- STL
1 stop13h 18m
Frontier
Deal found 3/13![Frontier logo]()
$87
This Frontier deal was found by Cheapflights users on 3/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/111:55 pm
OKC
- STL
1 stop5h 28m
Frontier
Deal found 3/15![Frontier logo]()
$90
This Frontier deal was found by Cheapflights users on 3/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/165:05 pm
OKC
- MDW
1 stop5h 14m
Frontier
Deal found 3/15![Frontier logo]()
$90
This Frontier deal was found by Cheapflights users on 3/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/165:05 pm
OKC
- ORD
1 stop5h 34m
Frontier
Deal found 3/15![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Fri 4/108:30 pm
OKC
- STL
1 stop13h 18m
Frontier
Deal found 3/13![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Fri 4/108:30 pm
OKC
- ORD
1 stop28h 08m
Frontier
Deal found 3/13![Frontier logo]()
$95
This Expedia deal was found by Cheapflights users on 3/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/148:04 pm
OKC
- STL
1 stop24h 19m
Frontier
Deal found 3/15![Frontier logo]()
$96
This Frontier deal was found by Cheapflights users on 3/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:25 pm
OKC
- ORD
1 stop10h 55m
Frontier
Deal found 3/12![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 5/1212:41 pm
OKC
- MDW
2 stops25h 31m
Frontier
Deal found 3/12![Frontier logo]()
$101
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 March 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $164 (Kiwi.com) |
One-way from | $69 (Trip.com) |
Popular in | March |
Cheapest in | September |
Average price | $410 |
Good round-trip deal | $376 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 March 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 CitySt. Louis
OKC - STL
OKCSTL
Oklahoma City Will Rogers World
Sun 4/5
8:30 pm-9:48 am
1 stop13h 18m
Lambert-St Louis
Wed 4/8
8:16 pm-7:45 pm
1 stop23h 29m
$264
Oklahoma CitySt. Louis
OKC - STL
OKCSTL
Oklahoma City Will Rogers World
Tue 5/5
10:40 am-8:20 pm
2 stops9h 40m
Lambert-St Louis
Wed 5/6
10:25 am-10:00 pm
2 stops11h 35m
$305
Quickest round-trip
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Wed 6/3
3:05 pm-4:55 pm
Nonstop1h 50m
Chicago Midway
Thu 6/4
10:10 am-12:15 pm
Nonstop2h 05m
$309
Oklahoma CityMoline
OKC - MLI
OKCMLI
Oklahoma City Will Rogers World
Wed 4/8
5:49 pm-11:54 pm
1 stop6h 05m
Moline Quad-City
Sat 4/18
12:51 pm-10:58 pm
2 stops10h 07m
$314
Oklahoma CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Mon 6/8
4:11 pm-6:40 pm
Nonstop2h 29m
Chicago O'Hare Intl
Wed 6/10
3:35 pm-6:05 pm
Nonstop2h 30m
$319
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Sat 4/11
5:00 am-6:50 am
Nonstop1h 50m
Chicago Midway
Tue 4/14
10:10 am-6:05 pm
1 stop7h 55m
$319
Oklahoma CityMoline
OKC - MLI
OKCMLI
Oklahoma City Will Rogers World
Fri 3/27
6:37 pm-10:53 pm
1 stop4h 16m
Moline Quad-City
Mon 3/30
1:30 pm-10:44 pm
2 stops9h 14m
$324
Oklahoma CityMoline
OKC - MLI
OKCMLI
Oklahoma City Will Rogers World
Thu 3/26
5:53 pm-11:37 pm
1 stop5h 44m
Moline Quad-City
Mon 3/30
1:30 pm-10:44 pm
2 stops9h 14m
$324
Oklahoma CitySt. Louis
OKC - STL
OKCSTL
Oklahoma City Will Rogers World
Mon 4/6
5:30 am-9:35 am
1 stop4h 05m
Lambert-St Louis
Wed 4/8
6:40 pm-10:50 pm
1 stop4h 10m
$333
Oklahoma CityMoline
OKC - MLI
OKCMLI
Oklahoma City Will Rogers World
Fri 8/21
12:35 pm-6:01 pm
1 stop5h 26m
Moline Quad-City
Mon 8/24
2:29 pm-11:14 pm
2 stops8h 45m
$334
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-MDW
OKC-ORD
OKC-PIA
OKC-MLI
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-MDW
OKC-ORD
OKC-PIA
What is the cheapest month to book a flight from Oklahoma City to Illinois?
Currently, January is the cheapest month in which you can book a flight from Oklahoma City to Illinois (average of $133). Flying from Oklahoma City to Illinois in November is currently the most expensive (average of $267). 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 March 16, 2026.
It’s optimal to fly from Oklahoma City to Illinois in the morning. By choosing this option you can save up to 28% 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 March 14, 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 March 16, 2026.
The most flights from OKC to USIL are scheduled on a Monday (21 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (18 on average).
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 March 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.
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Mar 2026
KOA - HNL
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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Complete your trip
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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 March 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 March 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$138 | Average$188 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$240 | Average$393 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$243 | Average$381 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$255 | Average$415 | FlexibilityNo cancel fee | On-time71% |