$90+ Cheap flights from Oklahoma City (OKC) to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Oct 19 — Oct 261
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 September 19, 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 September 19, 2026.
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:45 pm -
1 stop10h 31m
Sat 10/246:30 am -
1 stop13h 02m
Deal found 9/16![Frontier logo]()
$221
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/308:19 pm -
1 stop28h 02m
Tue 11/36:30 am -
1 stop12h 54m
Deal found 9/16![Frontier logo]()
$233
This Delta deal was found by Cheapflights users on 9/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:32 pm -
1 stop4h 43m
Wed 10/76:00 am -
1 stop4h 30m
Deal found 9/16![Delta logo]()
$239
This CheapOair deal was found by Cheapflights users on 9/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:27 pm -
1 stop27h 57m
Tue 10/276:30 am -
1 stop12h 54m
Deal found 9/17![Frontier logo]()
$242
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/243:25 pm -
1 stop8h 15m
Wed 10/2810:20 am -
2 stops8h 10m
Deal found 9/16![Southwest logo]()
$244
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:45 pm -
1 stop10h 31m
Mon 10/266:30 am -
1 stop13h 12m
Deal found 9/16![Frontier logo]()
$250
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 10/131:51 pm -
1 stop5h 57m
Thu 10/155:40 am -
1 stop4h 35m
Deal found 9/14![American Airlines logo]()
$254
This United Airlines deal was found by Cheapflights users on 9/17. 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 10/247:15 am -
Nonstop2h 25m
Tue 10/278:50 am -
Nonstop2h 50m
Deal found 9/17![United Airlines logo]()
$257
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/248:25 pm -
1 stop24h 56m
Sat 1/166:21 am -
1 stop13h 08m
Deal found 9/16![Frontier logo]()
$258
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/63:05 pm -
1 stop7h 00m
Wed 10/710:20 am -
2 stops8h 10m
Deal found 9/16![Southwest logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Tue 10/68:30 pm -
2 stops32h 47m
Tue 10/136:30 am -
1 stop13h 12m
Deal found 9/15![Frontier logo]()
$262
This CheapOair deal was found by Cheapflights users on 9/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/68:19 pm -
1 stop28h 02m
Mon 11/96:30 am -
1 stop12h 54m
Deal found 9/17![Frontier logo]()
$263
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 September 19, 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 September 19, 2026.
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/63:05 pm -
1 stop7h 00m
Wed 10/710:20 am -
2 stops8h 10m
Deal found 9/16![Southwest logo]()
$259
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 10/146:46 pm -
1 stop4h 58m
Thu 10/156:15 am -
1 stop4h 52m
Deal found 9/14![United Airlines logo]()
$280
This Delta deal was found by Cheapflights users on 9/15. 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.
Mon 10/195:20 am -
1 stop5h 31m
Fri 10/235:35 pm -
1 stop6h 23m
Deal found 9/15![Delta logo]()
$285
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:00 am -
1 stop6h 03m
Tue 10/134:38 pm -
1 stop7h 18m
Deal found 9/16![American Airlines logo]()
$354
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/317:05 am -
1 stop6h 35m
Sat 11/77:10 pm -
Nonstop2h 10m
Deal found 9/16![Southwest logo]()
$267
This Southwest deal was found by Cheapflights users on 9/15. 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 10/245:10 am -
Nonstop1h 55m
Tue 10/2710:10 am -
2 stops6h 10m
Deal found 9/15![Southwest logo]()
$272
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 12/27:00 am -
1 stop7h 16m
Tue 12/86:30 am -
2 stops9h 45m
Deal found 9/14![United Airlines logo]()
$314
This Delta deal was found by Cheapflights users on 9/18. 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.
Fri 11/205:30 am -
1 stop5h 45m
Mon 11/235:30 pm -
1 stop5h 33m
Deal found 9/18![Delta logo]()
$343
This Southwest deal was found by Cheapflights users on 9/14. 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 10/273:05 pm -
Nonstop1h 55m
Thu 10/2910:25 pm -
Nonstop2h 10m
Deal found 9/14![Southwest logo]()
$289
This American Airlines deal was found by Cheapflights users on 9/17. 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 10/23:17 pm -
2 stops8h 51m
Tue 10/67:00 am -
1 stop4h 46m
Deal found 9/17![American Airlines logo]()
$374
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/1311:52 am -
2 stops9h 29m
Thu 10/158:00 am -
1 stop8h 00m
Deal found 9/14![United Airlines logo]()
$360
This Southwest deal was found by Cheapflights users on 9/17. 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 11/1710:55 am -
2 stops6h 10m
Sat 11/216:55 pm -
2 stops5h 55m
Deal found 9/17![Southwest logo]()
$316
This Delta deal was found by Cheapflights users on 9/17. 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 12/105:21 am -
1 stop5h 08m
Sun 12/136:00 am -
1 stop6h 40m
Deal found 9/17![Delta logo]()
$389
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Thu 10/296:00 am -
2 stops8h 29m
Fri 10/306:50 pm -
1 stop5h 04m
Deal found 9/15![United Airlines logo]()
$360
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:25 am -
2 stops8h 35m
Wed 10/285:30 am -
2 stops8h 55m
Deal found 9/16![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 10/107:15 am -
Nonstop2h 25m
Sun 10/116:00 am -
1 stop6h 52m
Deal found 9/15![United Airlines logo]()
$371
This Southwest deal was found by Cheapflights users on 9/18. 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 11/25:50 pm -
1 stop6h 15m
Mon 11/92:35 pm -
2 stops9h 20m
Deal found 9/18![Southwest logo]()
$322
This American Airlines deal was found by Cheapflights users on 9/18. 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 10/37:40 am -
1 stop5h 19m
Wed 10/75:54 pm -
1 stop4h 41m
Deal found 9/18![American Airlines logo]()
$497
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/295:00 am -
2 stops7h 37m
Sat 10/310:49 am -
2 stops9h 16m
Deal found 9/14![United Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 9/17. 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.
Sun 10/186:30 pm -
1 stop6h 10m
Wed 10/213:35 pm -
2 stops6h 35m
Deal found 9/17![Southwest logo]()
$330
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 11/247:29 pm -
1 stop4h 38m
Sat 11/285:00 am -
1 stop7h 35m
Deal found 9/14![American Airlines logo]()
$503
This Delta deal was found by Cheapflights users on 9/17. 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.
Fri 10/25:30 am -
1 stop7h 33m
Tue 10/610:07 am -
2 stops10h 10m
Deal found 9/17![Delta logo]()
$512
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 10/285:34 pm -
1 stop5h 25m
Sat 10/318:46 am -
1 stop7h 35m
Deal found 9/14![United Airlines logo]()
$385
This Southwest deal was found by Cheapflights users on 9/15. 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.
Fri 11/65:05 am -
Nonstop1h 55m
Mon 11/911:00 am -
1 stop7h 45m
Deal found 9/15![Southwest logo]()
$338
This American Airlines deal was found by Cheapflights users on 9/17. 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 10/25:00 am -
1 stop6h 55m
Tue 10/66:53 am -
1 stop4h 53m
Deal found 9/17![American Airlines logo]()
$507
This United Airlines deal was found by Cheapflights users on 9/17. 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 10/95:10 pm -
1 stop5h 20m
Sun 10/116:15 am -
1 stop4h 52m
Deal found 9/17![United Airlines logo]()
$391
This Delta deal was found by Cheapflights users on 9/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:31 am -
2 stops7h 28m
Sat 11/75:27 am -
1 stop5h 35m
Deal found 9/16![Delta logo]()
$543
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:38 am -
1 stop4h 17m
Mon 10/55:54 pm -
1 stop4h 41m
Deal found 9/16![American Airlines logo]()
$517
This United Airlines deal was found by Cheapflights users on 9/18. 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 11/231:19 pm -
Nonstop2h 19m
Thu 11/269:00 am -
Nonstop2h 31m
Deal found 9/18![United Airlines logo]()
$397
This Delta deal was found by Cheapflights users on 9/17. 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 11/107:27 am -
1 stop4h 21m
Mon 11/1611:19 am -
2 stops11h 44m
Deal found 9/17![Delta logo]()
$550
Last-minute flights from Oklahoma City to IllinoisDiscover last-minute flight deals from Oklahoma City to Illinois. Data last updated September 19, 2026 and is based on user searches.
Discover last-minute flight deals from Oklahoma City to Illinois. Data last updated September 19, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:32 pm -
1 stop4h 43m
Wed 10/76:00 am -
1 stop4h 30m
Deal found 9/16![Delta logo]()
$239
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/63:05 pm -
1 stop7h 00m
Wed 10/710:20 am -
2 stops8h 10m
Deal found 9/16![Southwest logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Tue 10/68:30 pm -
2 stops32h 47m
Tue 10/136:30 am -
1 stop13h 12m
Deal found 9/15![Frontier logo]()
$262
This Southwest deal was found by Cheapflights users on 9/15. 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 10/64:00 pm -
1 stop5h 05m
Tue 10/138:55 pm -
Nonstop2h 10m
Deal found 9/15![Southwest logo]()
$267
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 10/131:51 pm -
1 stop5h 57m
Thu 10/155:40 am -
1 stop4h 35m
Deal found 9/14![American Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 10/178:27 pm -
1 stop27h 57m
Sat 10/246:30 am -
1 stop13h 02m
Deal found 9/17![Frontier logo]()
$266
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:45 pm -
1 stop10h 31m
Sat 10/246:30 am -
1 stop13h 02m
Deal found 9/16![Frontier logo]()
$221
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:45 pm -
1 stop10h 31m
Mon 10/266:30 am -
1 stop13h 12m
Deal found 9/16![Frontier logo]()
$250
This CheapOair deal was found by Cheapflights users on 9/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/248:27 pm -
1 stop27h 57m
Tue 10/276:30 am -
1 stop12h 54m
Deal found 9/17![Frontier logo]()
$242
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/243:25 pm -
1 stop8h 15m
Wed 10/2810:20 am -
2 stops8h 10m
Deal found 9/16![Southwest logo]()
$244
This United Airlines deal was found by Cheapflights users on 9/17. 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 10/247:15 am -
Nonstop2h 25m
Tue 10/278:50 am -
Nonstop2h 50m
Deal found 9/17![United Airlines logo]()
$257
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/308:19 pm -
1 stop28h 02m
Tue 11/36:30 am -
1 stop12h 54m
Deal found 9/16![Frontier logo]()
$233
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 September 19, 2026.
Search for one-way flight options from Oklahoma City to Illinois. Find affordable one-way fares based on user searches. Data last updated September 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 10/208:27 pm -
1 stop27h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 12/158:29 pm -
1 stop28h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 11/178:19 pm -
1 stop28h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Tue 10/138:27 pm -
1 stop27h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$102
This Trip.com deal was found by Cheapflights users on 9/19. 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 11/188:19 pm -
1 stop28h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/19![Frontier logo]()
$112
This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/218:27 pm -
1 stop27h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$118
This Frontier deal was found by Cheapflights users on 9/15. 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 11/126:44 pm -
1 stop10h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$120
This CheapOair deal was found by Cheapflights users on 9/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:27 pm -
1 stop22h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/178:19 pm -
2 stops21h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$128
This Southwest deal was found by Cheapflights users on 9/14. 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.
Wed 10/215:00 am -
Nonstop1h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Southwest logo]()
$129
This CheapOair deal was found by Cheapflights users on 9/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/238:27 pm -
1 stop22h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$132
This Delta deal was found by Cheapflights users on 9/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/177:27 am -
1 stop4h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Delta 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 September 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $221 (CheapOair) |
One-way from | $90 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $353 |
Good round-trip deal | $372 or less |
Good one-way deal | $195 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 7,457,451 searches. Data last updated September 19, 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 Oklahoma City Will Rogers World - STL Lambert-St Louis
OKCSTL
Oklahoma City Will Rogers World
Fri 10/16
8:27 pm-6:57 pm
1 stop22h 30m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$128
Oklahoma CityChicago
OKC Oklahoma City Will Rogers World - ORD Chicago O'Hare Intl
OKCORD
Oklahoma City Will Rogers World
Wed 12/16
2:15 pm-4:35 pm
Nonstop2h 20m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$129
Oklahoma CitySt. Louis
OKC Oklahoma City Will Rogers World - STL Lambert-St Louis
OKCSTL
Oklahoma City Will Rogers World
Fri 10/23
8:27 pm-6:57 pm
1 stop22h 30m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$132
Oklahoma CityChicago
OKC Oklahoma City Will Rogers World - MDW Chicago Midway
OKCMDW
Oklahoma City Will Rogers World
Tue 11/17
7:27 am-11:50 am
1 stop4h 23m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$139
Oklahoma CityChicago
OKC Oklahoma City Will Rogers World - ORD Chicago O'Hare Intl
OKCORD
Oklahoma City Will Rogers World
Wed 12/16
1:42 pm-8:49 pm
1 stop7h 07m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$139
Oklahoma CityChicago
OKC Oklahoma City Will Rogers World - ORD Chicago O'Hare Intl
OKCORD
Oklahoma City Will Rogers World
Fri 10/16
8:27 pm-12:24 am
1 stop27h 57m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$144
Oklahoma CityChicago
OKC Oklahoma City Will Rogers World - MDW Chicago Midway
OKCMDW
Oklahoma City Will Rogers World
Sat 11/14
4:00 pm-10:54 pm
1 stop6h 54m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$146
Oklahoma CityChicago
OKC Oklahoma City Will Rogers World - MDW Chicago Midway
OKCMDW
Oklahoma City Will Rogers World
Wed 11/18
5:30 am-10:24 am
1 stop4h 54m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$146
Oklahoma CityChicago
OKC Oklahoma City Will Rogers World - ORD Chicago O'Hare Intl
OKCORD
Oklahoma City Will Rogers World
Sat 11/14
5:30 am-12:20 pm
1 stop6h 50m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$146
Oklahoma CityChicago
OKC Oklahoma City Will Rogers World - ORD Chicago O'Hare Intl
OKCORD
Oklahoma City Will Rogers World
Thu 11/5
10:09 am-12:29 pm
Nonstop2h 20m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$148
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-MLI
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-MLI
What is the cheapest month to book a flight from Oklahoma City to Illinois?
Currently, February is the cheapest month in which you can book a flight from Oklahoma City to Illinois (average of $350). Flying from Oklahoma City to Illinois in July is currently the most expensive (average of $453). 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 September 19, 2026.
It’s optimal to fly from Oklahoma City to Illinois in the morning. By choosing this option you can save up to 26% 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 September 19, 2026.
The most flights from OKC to USIL are scheduled on a Friday (28 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (14 on average).
How much does it cost to fly round-trip from Oklahoma City to Illinois?
Airfare is below average for this route at the moment.
Oklahoma City to Illinois flights typically cost between $262 and $424 in October.The cheapest round-trip price found within the last 5 days was $221 on Frontier (Oct 22-Oct 24).
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 75 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 September 12, 2026.
Travelers seeking maximum savings on their Oklahoma City to Illinois flight should consider departing on Thursday at noon when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 September 19, 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.
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
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 September 19, 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 7,457,451 searches. Data last updated September 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$138 | Average$166 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$240 | Average$457 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$248 | Average$452 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$260 | Average$387 | FlexibilityNo cancel fee | On-time69% |