$49+ Cheap flights from Oklahoma 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Oct 17 — Oct 241
Round-trip
1 adult, Economy
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Find cheap flights from Oklahoma 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
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Cheapest flights from Oklahoma to IllinoisExplore the most affordable flight options available from Oklahoma to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
Explore the most affordable flight options available from Oklahoma to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:10 pm -
1 stop20h 30m
Mon 11/26:44 pm -
1 stop12h 16m
Deal found 9/14![Frontier logo]()
$159
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/199:30 am -
Nonstop1h 49m
Fri 11/206:35 pm -
1 stop13h 46m
Deal found 9/14![Frontier logo]()
$162
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:27 pm -
1 stop22h 30m
Fri 10/236:35 pm -
1 stop12h 33m
Deal found 9/15![Frontier logo]()
$166
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/83:02 pm -
Nonstop1h 56m
Sun 10/115:53 pm -
Nonstop2h 01m
Deal found 9/15![Frontier logo]()
$167
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/59:30 am -
Nonstop1h 49m
Sun 11/812:14 pm -
Nonstop2h 03m
Deal found 9/14![Frontier logo]()
$168
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/139:30 am -
Nonstop1h 49m
Sun 11/1512:14 pm -
Nonstop2h 03m
Deal found 9/14![Frontier logo]()
$170
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/123:02 pm -
Nonstop1h 56m
Mon 10/196:35 pm -
1 stop12h 25m
Deal found 9/13![Frontier logo]()
$172
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:05 am -
1 stop9h 35m
Sun 10/185:53 pm -
Nonstop2h 01m
Deal found 9/14![Frontier logo]()
$174
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/161:20 pm -
1 stop9h 53m
Sun 10/185:53 pm -
Nonstop2h 01m
Deal found 9/16![Frontier logo]()
$175
This Priceline deal was found by Cheapflights users on 9/13. 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.
Fri 10/93:02 pm -
Nonstop1h 56m
Mon 10/125:53 pm -
Nonstop2h 01m
Deal found 9/13![Frontier logo]()
$176
This Expedia deal was found by Cheapflights users on 9/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/69:30 am -
Nonstop1h 49m
Sun 11/84:26 pm -
1 stop15h 51m
Deal found 9/12![Frontier logo]()
$177
This Priceline deal was found by Cheapflights users on 9/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:16 pm -
Nonstop2h 29m
Mon 10/51:01 pm -
Nonstop2h 46m
Deal found 9/12![Frontier logo]()
$202
Best flights from Oklahoma to IllinoisDiscover carefully curated flight deals from Oklahoma to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
Discover carefully curated flight deals from Oklahoma to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:05 am -
1 stop9h 35m
Thu 10/154:30 pm -
1 stop15h 46m
Deal found 9/16![Frontier logo]()
$186
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.
Tue 10/203:57 pm -
1 stop6h 33m
Tue 10/2711:00 am -
1 stop5h 05m
Deal found 9/15![United Airlines logo]()
$221
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.
Wed 10/71:36 pm -
1 stop4h 24m
Wed 10/145:09 pm -
1 stop7h 13m
Deal found 9/15![Delta logo]()
$253
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 10/2011:35 am -
2 stops7h 55m
Tue 10/276:05 am -
1 stop8h 15m
Deal found 9/14![Southwest logo]()
$266
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 11/510:01 pm -
1 stop12h 32m
Sun 11/81:08 pm -
1 stop7h 31m
Deal found 9/12![Multiple Airlines logo]()
$342
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:19 pm -
Nonstop2h 11m
Tue 10/138:00 pm -
Nonstop1h 59m
Deal found 9/16![United Airlines logo]()
$239
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.
Tue 10/209:59 am -
2 stops8h 01m
Wed 10/211:27 pm -
2 stops10h 55m
Deal found 9/15![Delta logo]()
$263
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 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 10/105:30 pm -
1 stop5h 00m
Tue 10/133:12 pm -
1 stop4h 48m
Deal found 9/17![United Airlines logo]()
$265
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 10/279:00 am -
1 stop8h 40m
Deal found 9/15![Southwest logo]()
$267
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.
Wed 10/216:00 am -
2 stops10h 32m
Wed 10/281:55 pm -
2 stops8h 44m
Deal found 9/15![Delta logo]()
$269
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.
Mon 10/125:15 am -
Nonstop1h 45m
Wed 10/145:40 am -
1 stop5h 15m
Deal found 9/15![Southwest logo]()
$267
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.
Wed 12/25:25 pm -
1 stop6h 27m
Sat 12/53:55 pm -
1 stop7h 11m
Deal found 9/16![Delta logo]()
$277
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:40 am -
Nonstop1h 55m
Thu 10/110:20 am -
Nonstop1h 56m
Deal found 9/16![Frontier logo]()
$350
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.
Thu 10/1510:11 pm -
1 stop13h 16m
Sun 10/189:33 pm -
2 stops26h 42m
Deal found 9/16![Multiple Airlines logo]()
$365
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 11/164:48 pm -
1 stop6h 06m
Wed 11/186:00 am -
1 stop6h 13m
Deal found 9/15![Delta logo]()
$277
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 12/53:45 pm -
1 stop6h 45m
Wed 12/96:30 am -
2 stops9h 37m
Deal found 9/15![United Airlines logo]()
$306
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 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 11/1612:59 pm -
1 stop6h 06m
Wed 11/186:49 am -
1 stop5h 24m
Deal found 9/15![Delta logo]()
$277
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.
Thu 10/2210:11 pm -
1 stop13h 16m
Sun 10/2510:20 am -
1 stop10h 34m
Deal found 9/15![Multiple Airlines logo]()
$369
This Kiwi.com deal was found by Cheapflights users on 9/12. 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 10/89:59 pm -
2 stops19h 41m
Mon 10/126:35 pm -
1 stop12h 25m
Deal found 9/12![Frontier logo]()
$373
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 10/145:15 am -
2 stops10h 06m
Sat 10/178:00 am -
2 stops12h 26m
Deal found 9/14![United Airlines logo]()
$311
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 10/54:53 pm -
1 stop5h 51m
Tue 10/61:27 pm -
2 stops9h 12m
Deal found 9/15![Delta logo]()
$282
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 10/54:53 pm -
1 stop7h 06m
Tue 10/61:55 pm -
2 stops8h 44m
Deal found 9/15![Delta logo]()
$282
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.
Wed 11/117:00 am -
Nonstop2h 06m
Sun 11/157:00 am -
1 stop5h 58m
Deal found 9/17![United Airlines logo]()
$345
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 10/316:00 am -
2 stops6h 40m
Sat 11/710:15 am -
2 stops9h 15m
Deal found 9/16![Southwest logo]()
$363
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.
Fri 10/305:15 am -
2 stops9h 14m
Thu 11/56:15 am -
1 stop4h 56m
Deal found 9/15![United Airlines logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Wed 11/1810:03 pm -
1 stop13h 44m
Sun 11/2212:37 pm -
2 stops20h 53m
Deal found 9/13![Multiple Airlines logo]()
$472
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 10/101:30 pm -
Nonstop1h 40m
Tue 10/138:50 pm -
Nonstop1h 50m
Deal found 9/16![Southwest logo]()
$367
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.
Wed 11/1810:03 pm -
1 stop13h 44m
Mon 11/236:38 pm -
1 stop13h 48m
Deal found 9/15![Multiple Airlines logo]()
$486
Last-minute flights from Oklahoma to IllinoisDiscover last-minute flight deals from Oklahoma to Illinois. Data last updated September 17, 2026 and is based on user searches.
Discover last-minute flight deals from Oklahoma to Illinois. Data last updated September 17, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 9/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:16 pm -
Nonstop2h 29m
Mon 10/51:01 pm -
Nonstop2h 46m
Deal found 9/12![Frontier logo]()
$202
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/58:05 am -
1 stop5h 05m
Fri 10/95:53 pm -
Nonstop2h 01m
Deal found 9/15![Frontier logo]()
$179
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/83:02 pm -
Nonstop1h 56m
Sun 10/115:53 pm -
Nonstop2h 01m
Deal found 9/15![Frontier logo]()
$167
This Priceline deal was found by Cheapflights users on 9/13. 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.
Fri 10/93:02 pm -
Nonstop1h 56m
Mon 10/125:53 pm -
Nonstop2h 01m
Deal found 9/13![Frontier logo]()
$176
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/123:02 pm -
Nonstop1h 56m
Sun 10/185:53 pm -
Nonstop2h 01m
Deal found 9/13![Frontier logo]()
$168
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/123:02 pm -
Nonstop1h 56m
Mon 10/196:35 pm -
1 stop12h 25m
Deal found 9/13![Frontier logo]()
$172
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:05 am -
1 stop9h 35m
Sun 10/185:53 pm -
Nonstop2h 01m
Deal found 9/14![Frontier logo]()
$174
This Priceline deal was found by Cheapflights users on 9/13. 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 10/154:14 pm -
Nonstop2h 42m
Sun 10/186:20 am -
Nonstop2h 39m
Deal found 9/13![Frontier logo]()
$203
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:27 pm -
1 stop22h 30m
Fri 10/236:35 pm -
1 stop12h 33m
Deal found 9/15![Frontier logo]()
$166
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:02 pm -
Nonstop1h 56m
Sun 10/185:53 pm -
Nonstop2h 01m
Deal found 9/14![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 10/209:10 pm -
1 stop20h 30m
Fri 10/235:53 pm -
Nonstop2h 01m
Deal found 9/13![Frontier logo]()
$180
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:10 pm -
1 stop20h 30m
Mon 11/26:44 pm -
1 stop12h 16m
Deal found 9/14![Frontier logo]()
$159
One-way flights from Oklahoma to IllinoisSearch for one-way flight options from Oklahoma to Illinois. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
Search for one-way flight options from Oklahoma to Illinois. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:05 am -
1 stop9h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$49
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 11/179:10 pm -
1 stop20h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$52
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.
Wed 11/188:05 am -
1 stop9h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$53
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/118:05 am -
1 stop9h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$54
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Wed 11/48:05 am -
1 stop9h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Frontier logo]()
$56
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 10/139:10 pm -
1 stop20h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$57
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 11/109:10 pm -
1 stop20h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Frontier logo]()
$59
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:05 am -
1 stop9h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$62
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.
Sun 12/132:46 pm -
1 stop20h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$65
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.
Thu 10/159:10 pm -
1 stop20h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$69
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.
Tue 10/208:27 pm -
1 stop27h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$97
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
Find flight deals from Oklahoma to Illinois
Keep the following information in mind while searching for Oklahoma to Illinois flight deals. Data was last updated September 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $159 (Kiwi.com) |
One-way from | $49 (Trip.com) |
Popular in | June |
Cheapest in | January |
Average price | $353 |
Good round-trip deal | $338 or less |
Good one-way deal | $195 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Oklahoma 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 17, 2026.
Use the filters below to find and compare flights from Oklahoma to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DallasSt. Louis
DFW Dallas/Fort Worth - STL Lambert-St Louis
DFWSTL
Dallas/Fort Worth
Tue 11/17
9:22 am-5:40 pm
2 stops32h 18m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$87
DallasSt. Louis
DFW Dallas/Fort Worth - STL Lambert-St Louis
DFWSTL
Dallas/Fort Worth
Tue 12/15
6:40 pm-11:26 pm
1 stop4h 46m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$111
DallasChicago
DFW Dallas/Fort Worth - ORD Chicago O'Hare Intl
DFWORD
Dallas/Fort Worth
Sat 10/17
7:00 am-9:42 am
Nonstop2h 42m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$117
DallasChicago
DFW Dallas/Fort Worth - MDW Chicago Midway
DFWMDW
Dallas/Fort Worth
Sat 10/10
11:47 am-6:00 pm
1 stop6h 13m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$127
TulsaChicago
TUL Tulsa - ORD Chicago O'Hare Intl
TULORD
Tulsa
Wed 11/18
12:59 pm-8:49 pm
1 stop7h 50m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$130
DallasChicago
DFW Dallas/Fort Worth - ORD Chicago O'Hare Intl
DFWORD
Dallas/Fort Worth
Tue 10/13
7:05 am-4:32 pm
2 stops9h 27m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$132
DallasChicago
DFW Dallas/Fort Worth - ORD Chicago O'Hare Intl
DFWORD
Dallas/Fort Worth
Wed 10/14
11:47 am-8:38 pm
2 stops8h 51m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$132
DallasChicago
DFW Dallas/Fort Worth - MDW Chicago Midway
DFWMDW
Dallas/Fort Worth
Tue 10/13
11:47 am-10:33 pm
2 stops10h 46m
Chicago Midway
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$132
TulsaChicago
TUL Tulsa - ORD Chicago O'Hare Intl
TULORD
Tulsa
Sat 11/14
6:00 am-4:18 pm
2 stops10h 18m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$135
TulsaChicago
TUL Tulsa - ORD Chicago O'Hare Intl
TULORD
Tulsa
Tue 11/17
6:00 am-2:55 pm
2 stops8h 55m
Chicago O'Hare Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$135
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Oklahoma to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Oklahoma with our price prediction graph.
DFW-STL
DFW-MDW
TUL-MDW
DFW-RFD
TUL-ORD
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 to Illinois
USOK-USIL
DFW-STL
DFW-MDW
TUL-MDW
DFW-RFD
What is the cheapest month to book a flight from Oklahoma to Illinois?
Currently, October is the cheapest month in which you can book a flight from Oklahoma to Illinois (average of $347). Flying from Oklahoma to Illinois in July is currently the most expensive (average of $443). 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 OK to IL?
Find hourly flight availability from Oklahoma 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 17, 2026.
A simple way to save on the total cost of your ticket is to fly from Oklahoma to Illinois in the morning. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight at noon.
Weekly flight availability from Oklahoma to Illinois
Explore weekly flight availability from Oklahoma 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 17, 2026.
The most flights from USOK to USIL are scheduled on a Wednesday (25 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 on average).
How much does it cost to fly round-trip from Oklahoma to Illinois?
Airfare is below average for this route at the moment.
Oklahoma to Illinois flights typically cost between $260 and $444 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 to Illinois?
To ensure you get the cheapest price possible for a flight from Oklahoma to Illinois, you should look to book at least 77 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest day to fly from Oklahoma to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Oklahoma to Illinois. Price data was last updated on September 12, 2026.
Travelers seeking maximum savings on their Oklahoma to Illinois flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Tuesday 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 17, 2026.
See what other customers who have flown with Southwest,United Airlines, andAmerican Airlines from Oklahoma to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
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 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 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 to Illinois by cabin class
Find flights from Oklahoma to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Oklahoma and Illinois flights
Browse other Oklahoma and Illinois flight options. Last updated on September 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Illinois
Find the right flight back to Oklahoma after your stay in Illinois
Oklahoma to Illinois flights
Consider these flights traveling from Oklahoma to Illinois.
Top 4 airlines flying from Oklahoma to Illinois
Discover the top 4 airlines that operate flights from Oklahoma 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 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$138 | Average$166 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$177 | Average$384 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$195 | Average$430 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$231 | Average$403 | FlexibilityNo cancel fee | On-time63% |