$36+ Cheap flights from Oklahoma to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Sep 3 — Sep 101
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 August 4, 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 August 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/177:40 am -
Nonstop1h 55m
Mon 9/212:29 pm -
1 stop28h 14m
Deal found 7/31![Frontier logo]()
$117
This Super.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/83:50 pm -
Nonstop1h 56m
Sun 10/116:41 pm -
Nonstop2h 05m
Deal found 8/2![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:48 pm -
1 stop17h 22m
Sun 9/2010:20 am -
Nonstop1h 56m
Deal found 8/3![Frontier logo]()
$120
This Frontier deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:40 am -
Nonstop1h 55m
Sun 10/410:20 am -
Nonstop1h 56m
Deal found 7/30![Frontier logo]()
$121
This Super.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:35 pm -
Nonstop1h 56m
Thu 8/275:27 pm -
Nonstop2h 02m
Deal found 8/3![Frontier logo]()
$122
This Frontier deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:35 pm -
Nonstop1h 56m
Tue 9/85:27 pm -
Nonstop2h 02m
Deal found 8/3![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/84:16 pm -
1 stop20h 54m
Mon 9/142:29 pm -
1 stop21h 43m
Deal found 8/3![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:17 am -
1 stop11h 05m
Wed 9/302:29 pm -
1 stop16h 31m
Deal found 8/1![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:40 am -
Nonstop1h 55m
Tue 11/310:35 am -
1 stop9h 15m
Deal found 8/3![Frontier logo]()
$128
This Trip.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:35 pm -
Nonstop1h 56m
Tue 9/16:45 pm -
1 stop11h 03m
Deal found 7/31![Frontier logo]()
$129
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/57:49 pm -
Nonstop2h 16m
Sun 9/69:25 pm -
Nonstop2h 01m
Deal found 7/31![American Airlines logo]()
$177
This American Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:38 am -
Nonstop2h 12m
Thu 9/39:25 pm -
Nonstop2h 01m
Deal found 7/30![American Airlines logo]()
$178
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 August 4, 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 August 4, 2026.
This Expedia deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:30 am -
1 stop29h 02m
Sun 9/1310:20 am -
Nonstop1h 56m
Deal found 7/30![Frontier logo]()
$161
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:51 am -
Nonstop2h 08m
Thu 9/33:46 pm -
Nonstop2h 05m
Deal found 7/30![United Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/45:30 am -
1 stop5h 25m
Wed 10/77:20 pm -
1 stop5h 02m
Deal found 7/30![Delta logo]()
$240
This Southwest deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2512:35 pm -
1 stop4h 35m
Thu 8/278:55 pm -
Nonstop2h 00m
Deal found 8/3![Southwest logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/99:21 am -
2 stops29h 42m
Sun 9/133:53 pm -
1 stop5h 28m
Deal found 8/2![Multiple Airlines logo]()
$281
This United Airlines deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/45:40 pm -
1 stop5h 19m
Sun 9/610:53 am -
1 stop5h 44m
Deal found 8/1![United Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:57 pm -
1 stop4h 55m
Thu 10/293:40 pm -
1 stop6h 59m
Deal found 8/3![Delta logo]()
$266
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:45 am -
Nonstop2h 00m
Thu 8/272:05 pm -
1 stop4h 55m
Deal found 7/31![Southwest logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:00 am -
1 stop8h 03m
Thu 9/103:53 pm -
1 stop5h 28m
Deal found 8/4![Multiple Airlines logo]()
$291
This Southwest deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2612:35 pm -
2 stops6h 40m
Mon 9/288:55 pm -
Nonstop2h 05m
Deal found 8/3![Southwest logo]()
$276
This Delta deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:57 pm -
1 stop4h 55m
Tue 10/203:40 pm -
1 stop6h 59m
Deal found 8/3![Delta logo]()
$278
This United Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:30 am -
Nonstop2h 07m
Mon 8/318:40 am -
Nonstop2h 04m
Deal found 8/3![United Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:00 am -
1 stop8h 09m
Sun 8/239:35 pm -
2 stops23h 44m
Deal found 8/1![Multiple Airlines logo]()
$302
This United Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:05 pm -
Nonstop2h 05m
Sun 11/13:35 pm -
Nonstop2h 14m
Deal found 8/3![United Airlines logo]()
$284
This Southwest deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/292:00 pm -
2 stops6h 55m
Mon 11/212:55 pm -
2 stops9h 30m
Deal found 8/1![Southwest logo]()
$291
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/45:30 am -
1 stop5h 25m
Sun 10/46:54 pm -
1 stop5h 03m
Deal found 7/30![Delta logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 am -
1 stop8h 09m
Sun 8/309:35 pm -
1 stop8h 13m
Deal found 8/3![Multiple Airlines logo]()
$310
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:00 am -
Nonstop2h 06m
Sat 11/78:43 am -
Nonstop2h 23m
Deal found 7/31![United Airlines logo]()
$293
This Delta deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:46 pm -
1 stop4h 47m
Mon 10/265:15 pm -
1 stop6h 28m
Deal found 8/2![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/104:25 pm -
1 stop5h 55m
Mon 9/148:55 pm -
Nonstop2h 05m
Deal found 7/31![Southwest logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:53 pm -
1 stop21h 20m
Sun 10/41:56 pm -
1 stop7h 25m
Deal found 8/2![Multiple Airlines logo]()
$313
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/45:45 pm -
Nonstop2h 31m
Mon 9/79:25 am -
Nonstop2h 22m
Deal found 7/31![United Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:15 am -
1 stop4h 35m
Wed 10/2812:45 pm -
1 stop7h 16m
Deal found 8/4![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:00 am -
2 stops6h 20m
Sun 9/68:10 am -
1 stop7h 10m
Deal found 7/31![Southwest logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:00 am -
2 stops32h 03m
Sun 9/279:29 pm -
1 stop8h 12m
Deal found 8/1![Multiple Airlines logo]()
$313
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/178:31 am -
1 stop6h 46m
Fri 10/235:15 pm -
1 stop5h 06m
Deal found 7/31![Delta logo]()
$299
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:15 am -
2 stops10h 23m
Sat 9/269:04 am -
2 stops10h 56m
Deal found 7/30![United Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 am -
1 stop4h 58m
Fri 10/233:40 pm -
1 stop8h 03m
Deal found 8/2![Delta logo]()
$299
This Southwest deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:45 am -
Nonstop2h 00m
Sun 10/410:20 pm -
Nonstop2h 05m
Deal found 8/1![Southwest logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:40 am -
1 stop11h 59m
Sun 9/279:29 pm -
1 stop8h 12m
Deal found 8/2![Multiple Airlines logo]()
$350
Last-minute flights from Oklahoma to IllinoisDiscover last-minute flight deals from Oklahoma to Illinois. Data last updated August 4, 2026 and is based on user searches.
Discover last-minute flight deals from Oklahoma to Illinois. Data last updated August 4, 2026 and is based on user searches.
This Super.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:35 pm -
Nonstop1h 56m
Thu 8/275:27 pm -
Nonstop2h 02m
Deal found 8/3![Frontier logo]()
$122
This Trip.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:35 pm -
Nonstop1h 56m
Tue 9/16:45 pm -
1 stop11h 03m
Deal found 7/31![Frontier logo]()
$129
This American Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:38 am -
Nonstop2h 12m
Thu 9/39:25 pm -
Nonstop2h 01m
Deal found 7/30![American Airlines logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:17 am -
1 stop11h 05m
Wed 9/302:29 pm -
1 stop16h 31m
Deal found 8/1![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:35 pm -
Nonstop1h 56m
Fri 9/46:17 pm -
1 stop21h 43m
Deal found 7/30![Frontier logo]()
$119
This Frontier deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/12:35 pm -
Nonstop1h 56m
Tue 9/85:27 pm -
Nonstop2h 02m
Deal found 8/3![Frontier logo]()
$124
This American Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/57:49 pm -
Nonstop2h 16m
Sun 9/69:25 pm -
Nonstop2h 01m
Deal found 7/31![American Airlines logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/84:16 pm -
1 stop20h 54m
Mon 9/142:29 pm -
1 stop21h 43m
Deal found 8/3![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/177:40 am -
Nonstop1h 55m
Mon 9/212:29 pm -
1 stop28h 14m
Deal found 7/31![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:48 pm -
1 stop17h 22m
Sun 9/2010:20 am -
Nonstop1h 56m
Deal found 8/3![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:48 pm -
1 stop17h 22m
Thu 9/2410:20 am -
Nonstop1h 56m
Deal found 8/3![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/177:40 am -
Nonstop1h 55m
Tue 11/310:35 am -
1 stop9h 15m
Deal found 8/3![Frontier logo]()
$128
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 August 4, 2026.
Search for one-way flight options from Oklahoma to Illinois. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
This Frontier deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/12:35 pm -
Nonstop1h 56m
Deal found 7/31![Frontier logo]()
$36
This Frontier deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/207:40 am -
Nonstop1h 55m
Deal found 8/2![Frontier logo]()
$49
This Frontier deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:40 am -
Nonstop1h 55m
Deal found 7/30![Frontier logo]()
$54
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/24:16 pm -
1 stop25h 06m
Deal found 8/2![Frontier logo]()
$56
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3110:00 am -
1 stop7h 22m
Deal found 7/31![Frontier logo]()
$57
This Kiwi.com deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/137:48 pm -
1 stop17h 22m
Deal found 8/3![Frontier logo]()
$58
This Super.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:40 am -
Nonstop1h 55m
Deal found 8/2![Frontier logo]()
$61
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/298:39 am -
1 stop25h 01m
Deal found 7/31![Frontier logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 10/318:55 pm -
1 stop13h 45m
Deal found 7/31![Frontier logo]()
$65
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” 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 9/510:21 am -
Nonstop2h 08m
Deal found 7/31![United Airlines logo]()
$89
This iWofly deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/102:25 pm -
1 stop15h 13m
Deal found 7/31![Frontier logo]()
$97
This Trip.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/313:44 pm -
1 stop21h 52m
Deal found 8/1![Frontier logo]()
$99
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 August 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $117 (Kiwi.com) |
One-way from | $36 (Frontier) |
Popular in | June |
Cheapest in | September |
Average price | $347 |
Good round-trip deal | $316 or less |
Good one-way deal | $187 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 2,558,603 searches. Data last updated August 4, 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 - STL
DFWSTL
Dallas/Fort Worth
Fri 9/11
6:30 am-11:32 am
1 stop29h 02m
Lambert-St Louis
Sun 9/13
10:20 am-12:16 pm
Nonstop1h 56m
$161
TulsaChicago
TUL - ORD
TULORD
Tulsa
Thu 8/27
9:51 am-11:59 am
Nonstop2h 08m
Chicago O'Hare Intl
Thu 9/3
3:46 pm-5:51 pm
Nonstop2h 05m
$177
DallasSt. Louis
DFW - STL
DFWSTL
Dallas/Fort Worth
Sun 10/4
5:30 am-10:55 am
1 stop5h 25m
Lambert-St Louis
Wed 10/7
7:20 pm-12:22 am
1 stop5h 02m
$240
DallasSt. Louis
DFW - STL
DFWSTL
Dallas/Fort Worth
Fri 9/4
5:40 pm-10:59 pm
1 stop5h 19m
Lambert-St Louis
Sun 9/6
10:53 am-4:37 pm
1 stop5h 44m
$257
TulsaChicago
TUL - ORD
TULORD
Tulsa
Mon 10/26
6:57 pm-11:52 pm
1 stop4h 55m
Chicago O'Hare Intl
Thu 10/29
3:40 pm-10:39 pm
1 stop6h 59m
$266
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Tue 8/25
12:35 pm-5:10 pm
1 stop4h 35m
Chicago Midway
Thu 8/27
8:55 pm-10:55 pm
Nonstop2h 00m
$271
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Wed 8/26
5:45 am-7:45 am
Nonstop2h 00m
Chicago Midway
Thu 8/27
2:05 pm-7:00 pm
1 stop4h 55m
$271
Oklahoma CityChicago
OKC - MDW
OKCMDW
Oklahoma City Will Rogers World
Sat 9/26
12:35 pm-7:15 pm
2 stops6h 40m
Chicago Midway
Mon 9/28
8:55 pm-11:00 pm
Nonstop2h 05m
$276
TulsaChicago
TUL - ORD
TULORD
Tulsa
Fri 10/16
6:57 pm-11:52 pm
1 stop4h 55m
Chicago O'Hare Intl
Tue 10/20
3:40 pm-10:39 pm
1 stop6h 59m
$278
FayettevilleChicago
XNA - ORD
XNAORD
Fayetteville Northwest Arkansas
Thu 8/27
7:30 am-9:37 am
Nonstop2h 07m
Chicago O'Hare Intl
Mon 8/31
8:40 am-10:44 am
Nonstop2h 04m
$279
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
TUL-ORD
DFW-RFD
OKC-MDW
OKC-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
TUL-ORD
DFW-RFD
OKC-MDW
What is the cheapest month to book a flight from Oklahoma to Illinois?
Currently, September is the cheapest month in which you can book a flight from Oklahoma to Illinois (average of $328). Flying from Oklahoma to Illinois in July is currently the most expensive (average of $440). 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 August 4, 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 21% 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 August 4, 2026.
The most flights from USOK to USIL are scheduled on a Monday (29 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (7 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 $296 and $404 in August.The cheapest round-trip price found within the last 5 days was $261 on United Airlines (Aug 26-Aug 27).
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 August 1, 2026.
Travelers seeking maximum savings on their Oklahoma to Illinois flight should consider departing on Saturday at noon 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 August 4, 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.
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Overall
8.0
Food
7.0
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 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 August 4, 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 2,558,603 searches. Data last updated August 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$138 | Average$168 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$196 | Average$407 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$230 | Average$382 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$231 | Average$425 | FlexibilityNo cancel fee | On-time63% |