$36+ Cheap flights from Illinois to Oklahoma
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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OKC
Sep 1 — Sep 81
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Oklahoma with Cheapflights
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Cheapest flights from Illinois to OklahomaExplore the most affordable flight options available from Illinois to Oklahoma. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2026.
Explore the most affordable flight options available from Illinois to Oklahoma. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 2, 2026.
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.
Sat 9/266:30 am
ORD
- OKC
1 stop13h 05m
Frontier
Mon 10/58:30 pm
OKC
- ORD
1 stop27h 53m
Frontier
Deal found 7/30![Frontier logo]()
$160
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.
Sun 9/1310:20 am
STL
- DFW
Nonstop1h 56m
Frontier
Fri 9/1810:53 pm
DFW
- STL
1 stop12h 39m
Frontier
Deal found 7/30![Frontier logo]()
$161
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.
Fri 10/96:41 pm
STL
- DFW
Nonstop2h 05m
Frontier
Mon 10/123:50 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 7/30![Frontier logo]()
$162
This American Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/188:36 am
STL
- DFW
Nonstop1h 58m
American Airlines
Tue 8/259:56 pm
DFW
- STL
Nonstop1h 46m
American Airlines
Deal found 7/29![American Airlines logo]()
$163
This Frontier deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 10/110:20 am
STL
- DFW
Nonstop1h 56m
Frontier
Sat 10/37:00 am
DFW
- STL
1 stop12h 17m
Frontier
Deal found 7/29![Frontier logo]()
$166
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:30 am
ORD
- OKC
1 stop13h 05m
Frontier
Mon 10/58:30 pm
OKC
- ORD
1 stop27h 53m
Frontier
Deal found 7/30![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 8/206:17 pm
STL
- DFW
1 stop17h 59m
Frontier
Thu 8/274:16 pm
DFW
- STL
1 stop25h 06m
Frontier
Deal found 7/28![Frontier logo]()
$168
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.
Sat 9/1212:17 pm
STL
- DFW
1 stop10h 42m
Frontier
Thu 9/1710:59 pm
DFW
- STL
1 stop12h 28m
Frontier
Deal found 7/30![Frontier logo]()
$169
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:19 pm
STL
- DFW
1 stop14h 48m
Frontier
Mon 9/2110:59 pm
DFW
- STL
1 stop12h 33m
Frontier
Deal found 7/30![Frontier logo]()
$170
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.
Thu 8/205:27 pm
STL
- DFW
Nonstop2h 02m
Frontier
Sun 8/238:05 pm
DFW
- STL
2 stops21h 17m
Frontier
Deal found 7/30![Frontier logo]()
$171
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.
Sat 9/266:30 am
ORD
- OKC
1 stop13h 05m
Frontier
Tue 9/298:30 pm
OKC
- ORD
1 stop27h 53m
Frontier
Deal found 7/31![Frontier logo]()
$172
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.
Mon 8/177:10 pm
STL
- DFW
1 stop10h 38m
Frontier
Tue 9/82:35 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 7/30![Frontier logo]()
$173
Best flights from Illinois to OklahomaDiscover carefully curated flight deals from Illinois to Oklahoma that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 2, 2026.
Discover carefully curated flight deals from Illinois to Oklahoma that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 2, 2026.
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 8/2512:52 pm
STL
- DFW
1 stop6h 07m
Delta
Tue 9/18:10 am
DFW
- STL
1 stop6h 23m
Delta
Deal found 7/28![Delta logo]()
$183
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 9/37:25 am
STL
- DFW
1 stop5h 44m
United Airlines
Mon 9/75:15 am
DFW
- STL
1 stop4h 55m
United Airlines
Deal found 7/29![United Airlines logo]()
$217
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:35 am
MDW
- OKC
Nonstop2h 00m
Southwest
Mon 8/243:30 pm
OKC
- MDW
Nonstop1h 50m
Southwest
Deal found 7/30![Southwest logo]()
$237
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.
Fri 9/410:15 pm
ORD
- XNA
Nonstop1h 54m
American Airlines
Mon 9/75:23 am
XNA
- ORD
Nonstop2h 07m
American Airlines
Deal found 7/30![American Airlines logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 11/125:10 pm
BMI
- DFW
1 stop25h 30m
Multiple Airlines
Tue 11/173:59 pm
DFW
- BMI
2 stops39h 48m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$350
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/259:15 am
STL
- DFW
1 stop6h 35m
Delta
Wed 8/268:10 am
DFW
- STL
1 stop6h 23m
Delta
Deal found 7/29![Delta logo]()
$183
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 9/1511:21 am
STL
- DFW
1 stop5h 56m
Delta
Wed 9/168:15 am
DFW
- STL
1 stop5h 08m
Delta
Deal found 7/28![Delta logo]()
$183
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/268:35 pm
ORD
- OKC
Nonstop2h 21m
United Airlines
Wed 9/27:19 am
OKC
- ORD
Nonstop2h 26m
United Airlines
Deal found 7/29![United Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 9/125:30 am
ORD
- TUL
1 stop6h 30m
Delta
Sat 9/195:30 pm
TUL
- ORD
1 stop6h 29m
Delta
Deal found 7/29![Delta logo]()
$197
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 10/1210:25 pm
MDW
- OKC
Nonstop2h 05m
Southwest
Tue 10/134:00 pm
OKC
- MDW
1 stop5h 00m
Southwest
Deal found 7/28![Southwest logo]()
$247
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/265:30 am
ORD
- TUL
1 stop6h 26m
Delta
Wed 9/212:41 pm
TUL
- ORD
1 stop6h 08m
Delta
Deal found 7/29![Delta logo]()
$197
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 9/95:15 pm
MDW
- OKC
1 stop4h 20m
Southwest
Wed 9/163:20 pm
OKC
- MDW
Nonstop1h 50m
Southwest
Deal found 7/28![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 8/209:25 pm
ORD
- TUL
Nonstop2h 02m
United Airlines
Mon 8/247:15 am
TUL
- ORD
Nonstop2h 03m
United Airlines
Deal found 7/28![United Airlines logo]()
$258
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 9/510:50 am
ORD
- TUL
1 stop6h 07m
Delta
Sun 9/65:45 pm
TUL
- ORD
1 stop6h 12m
Delta
Deal found 8/2![Delta logo]()
$197
This Southwest deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/248:55 pm
MDW
- OKC
Nonstop2h 00m
Southwest
Tue 8/256:25 am
OKC
- MDW
1 stop7h 05m
Southwest
Deal found 7/29![Southwest logo]()
$247
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:00 am
ORD
- XNA
1 stop6h 13m
American Airlines
Sun 10/45:00 am
XNA
- ORD
1 stop5h 08m
American Airlines
Deal found 8/1![American Airlines logo]()
$299
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:30 am
ORD
- TUL
1 stop6h 26m
Delta
Mon 8/315:45 pm
TUL
- ORD
1 stop6h 12m
Delta
Deal found 7/29![Delta logo]()
$197
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 10/176:35 am
MDW
- OKC
2 stops7h 15m
Southwest
Mon 10/193:15 pm
OKC
- MDW
Nonstop1h 55m
Southwest
Deal found 7/28![Southwest logo]()
$252
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 9/311:00 am
STL
- DFW
1 stop6h 17m
Delta
Tue 9/85:55 pm
DFW
- STL
1 stop5h 47m
Delta
Deal found 7/28![Delta logo]()
$200
This KAYAK deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:12 am
STL
- DFW
Nonstop2h 02m
American Airlines
Tue 10/208:13 pm
DFW
- STL
Nonstop1h 46m
American Airlines
Deal found 7/28![American Airlines logo]()
$325
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 9/39:25 pm
ORD
- TUL
Nonstop2h 02m
United Airlines
Fri 9/46:26 pm
TUL
- ORD
Nonstop2h 14m
United Airlines
Deal found 7/30![United Airlines logo]()
$300
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 9/178:55 pm
MDW
- OKC
Nonstop2h 05m
Southwest
Mon 9/215:15 am
OKC
- MDW
Nonstop1h 50m
Southwest
Deal found 8/1![Southwest logo]()
$261
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 9/158:20 am
STL
- DFW
3 stops14h 20m
United Airlines
Wed 9/166:45 am
DFW
- STL
1 stop5h 12m
United Airlines
Deal found 7/28![United Airlines logo]()
$307
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 9/122:15 pm
MDW
- OKC
2 stops6h 55m
Southwest
Sat 9/196:05 am
OKC
- MDW
1 stop5h 45m
Southwest
Deal found 7/28![Southwest logo]()
$262
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 9/195:47 pm
STL
- DFW
1 stop4h 41m
Delta
Mon 9/216:29 pm
DFW
- STL
1 stop4h 47m
Delta
Deal found 7/28![Delta logo]()
$217
This KAYAK deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:47 am
ORD
- XNA
Nonstop1h 56m
American Airlines
Sat 8/295:26 pm
XNA
- ORD
Nonstop2h 22m
American Airlines
Deal found 7/28![American Airlines logo]()
$359
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.
Tue 9/156:15 am
STL
- DFW
1 stop4h 46m
United Airlines
Tue 9/154:14 pm
DFW
- STL
1 stop5h 46m
United Airlines
Deal found 8/1![United Airlines logo]()
$313
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/276:00 am
STL
- DFW
1 stop5h 16m
Delta
Sat 8/292:17 pm
DFW
- STL
1 stop6h 16m
Delta
Deal found 7/29![Delta logo]()
$217
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 9/310:35 am
MDW
- OKC
Nonstop2h 00m
Southwest
Sun 9/64:00 pm
OKC
- MDW
2 stops6h 55m
Southwest
Deal found 8/1![Southwest logo]()
$264
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 8/281:35 pm
ORD
- OKC
Nonstop2h 31m
United Airlines
Fri 9/45:45 pm
OKC
- ORD
Nonstop2h 31m
United Airlines
Deal found 7/31![United Airlines logo]()
$333
Last-minute flights from Illinois to OklahomaDiscover last-minute flight deals from Illinois to Oklahoma. Data last updated August 2, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Oklahoma. Data last updated August 2, 2026 and is based on user searches.
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.
Mon 8/177:10 pm
STL
- DFW
1 stop10h 38m
Frontier
Tue 9/82:35 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 7/30![Frontier logo]()
$173
This American Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/188:36 am
STL
- DFW
Nonstop1h 58m
American Airlines
Tue 8/259:56 pm
DFW
- STL
Nonstop1h 46m
American Airlines
Deal found 7/29![American Airlines logo]()
$163
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.
Tue 8/188:00 am
STL
- DFW
1 stop11h 12m
Frontier
Tue 8/252:35 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 8/2![Frontier logo]()
$174
This Super.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/185:27 pm
STL
- DFW
Nonstop2h 02m
Frontier
Sun 8/232:35 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 7/29![Frontier logo]()
$176
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.
Wed 8/196:45 pm
STL
- DFW
1 stop16h 12m
Frontier
Tue 8/252:35 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 8/1![Frontier logo]()
$161
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.
Thu 8/205:27 pm
STL
- DFW
Nonstop2h 02m
Frontier
Sun 8/238:05 pm
DFW
- STL
2 stops21h 17m
Frontier
Deal found 7/30![Frontier logo]()
$171
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.
Tue 8/255:27 pm
STL
- DFW
Nonstop2h 02m
Frontier
Sun 8/306:17 am
DFW
- STL
1 stop11h 05m
Frontier
Deal found 8/1![Frontier logo]()
$169
This Priceline deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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.
Wed 8/266:45 pm
STL
- DFW
1 stop11h 03m
Frontier
Thu 8/272:35 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 7/29![Frontier logo]()
$166
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.
Wed 8/265:42 am
STL
- DFW
Nonstop1h 58m
American Airlines
Mon 8/319:56 pm
DFW
- STL
Nonstop1h 46m
American Airlines
Deal found 7/30![American Airlines logo]()
$180
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:41 pm
ORD
- OKC
1 stop24h 18m
Frontier
Mon 8/313:44 pm
OKC
- ORD
1 stop21h 52m
Frontier
Deal found 7/30![Frontier logo]()
$178
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.
Sat 8/295:02 pm
STL
- DFW
1 stop6h 49m
Frontier
Sat 9/57:13 pm
DFW
- STL
1 stop24h 00m
Frontier
Deal found 7/30![Frontier logo]()
$178
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/3112:46 pm
ORD
- TUL
Nonstop2h 14m
United Airlines
Wed 9/22:40 pm
TUL
- ORD
Nonstop2h 08m
United Airlines
Deal found 7/29![United Airlines logo]()
$177
One-way flights from Illinois to OklahomaSearch for one-way flight options from Illinois to Oklahoma. Find affordable one-way fares based on user searches. Data last updated August 2, 2026.
Search for one-way flight options from Illinois to Oklahoma. Find affordable one-way fares based on user searches. Data last updated August 2, 2026.
This Frontier deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” 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 8/255:27 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 7/28![Frontier logo]()
$36
This Frontier deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 9/15:27 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 7/29![Frontier logo]()
$37
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.
Sun 9/2710:20 am
STL
- DFW
Nonstop1h 56m
Frontier
Deal found 7/30![Frontier logo]()
$49
This Flightnetwork 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1310:20 am
STL
- DFW
Nonstop1h 56m
Frontier
Deal found 7/30![Frontier logo]()
$50
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:27 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 7/31![Frontier logo]()
$53
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 10/110:20 am
STL
- DFW
Nonstop1h 56m
Frontier
Deal found 7/30![Frontier logo]()
$54
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 8/316:17 pm
STL
- DFW
1 stop21h 43m
Frontier
Deal found 7/31![Frontier logo]()
$56
This Frontier deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 10/306:49 pm
STL
- DFW
Nonstop2h 05m
Frontier
Deal found 7/29![Frontier logo]()
$59
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.
Mon 9/282:29 pm
STL
- DFW
1 stop21h 43m
Frontier
Deal found 7/30![Frontier logo]()
$61
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.
Sun 8/306:17 pm
STL
- DFW
1 stop28h 14m
Frontier
Deal found 8/1![Frontier logo]()
$63
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/292:41 pm
ORD
- OKC
1 stop24h 18m
Frontier
Deal found 7/30![Frontier logo]()
$87
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 9/248:12 am
ORD
- TUL
Nonstop2h 05m
American Airlines
Deal found 7/30![American Airlines logo]()
$89
Find flight deals from Illinois to Oklahoma
Keep the following information in mind while searching for Illinois to Oklahoma flight deals. Data was last updated August 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $160 (Frontier) |
One-way from | $36 (Frontier) |
Popular in | July |
Cheapest in | October |
Average price | $415 |
Good round-trip deal | $279 or less |
Good one-way deal | $88 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Oklahoma 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 2, 2026.
Use the filters below to find and compare flights from Illinois to Oklahoma that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisDallas
STL - DFW
STLDFW
Lambert-St Louis
Tue 8/25
12:52 pm-6:59 pm
1 stop6h 07m
Dallas/Fort Worth
Tue 9/1
8:10 am-2:33 pm
1 stop6h 23m
$183
St. LouisDallas
STL - DFW
STLDFW
Lambert-St Louis
Tue 8/25
9:15 am-3:50 pm
1 stop6h 35m
Dallas/Fort Worth
Wed 8/26
8:10 am-2:33 pm
1 stop6h 23m
$183
St. LouisDallas
STL - DFW
STLDFW
Lambert-St Louis
Tue 9/15
11:21 am-5:17 pm
1 stop5h 56m
Dallas/Fort Worth
Wed 9/16
8:15 am-1:23 pm
1 stop5h 08m
$183
ChicagoTulsa
ORD - TUL
ORDTUL
Chicago O'Hare Intl
Sat 9/12
5:30 am-12:00 pm
1 stop6h 30m
Tulsa
Sat 9/19
5:30 pm-11:59 pm
1 stop6h 29m
$197
ChicagoTulsa
ORD - TUL
ORDTUL
Chicago O'Hare Intl
Wed 8/26
5:30 am-11:56 am
1 stop6h 26m
Tulsa
Wed 9/2
12:41 pm-6:49 pm
1 stop6h 08m
$197
ChicagoTulsa
ORD - TUL
ORDTUL
Chicago O'Hare Intl
Sat 9/5
10:50 am-4:57 pm
1 stop6h 07m
Tulsa
Sun 9/6
5:45 pm-11:57 pm
1 stop6h 12m
$197
ChicagoTulsa
ORD - TUL
ORDTUL
Chicago O'Hare Intl
Sat 8/29
5:30 am-11:56 am
1 stop6h 26m
Tulsa
Mon 8/31
5:45 pm-11:57 pm
1 stop6h 12m
$197
St. LouisDallas
STL - DFW
STLDFW
Lambert-St Louis
Thu 9/3
11:00 am-5:17 pm
1 stop6h 17m
Dallas/Fort Worth
Tue 9/8
5:55 pm-11:42 pm
1 stop5h 47m
$200
St. LouisDallas
STL - DFW
STLDFW
Lambert-St Louis
Thu 9/3
7:25 am-1:09 pm
1 stop5h 44m
Dallas/Fort Worth
Mon 9/7
5:15 am-10:10 am
1 stop4h 55m
$217
St. LouisDallas
STL - DFW
STLDFW
Lambert-St Louis
Sat 9/19
5:47 pm-10:28 pm
1 stop4h 41m
Dallas/Fort Worth
Mon 9/21
6:29 pm-11:16 pm
1 stop4h 47m
$217
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Oklahoma
Have a flexible travel schedule? Discover the best time to fly to Oklahoma from Illinois with our price prediction graph.
STL-DFW
ORD-TUL
ORD-OKC
MDW-OKC
ORD-XNA
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 Illinois to Oklahoma
USIL-USOK
STL-DFW
ORD-TUL
ORD-OKC
MDW-OKC
What is the cheapest month to book a flight from Illinois to Oklahoma?
Currently, January is the cheapest month in which you can book a flight from Illinois to Oklahoma (average of $345). Flying from Illinois to Oklahoma in June is currently the most expensive (average of $455). 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 IL to OK?
Find hourly flight availability from Illinois to Oklahoma. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 2, 2026.
One of the essential ways to save on airfare from Illinois to Oklahoma is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 22% on airfare.
Weekly flight availability from Illinois to Oklahoma
Explore weekly flight availability from Illinois to Oklahoma. 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 2, 2026.
The most flights from USIL to USOK are scheduled on a Friday (29 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 on average).
How much does it cost to fly round-trip from Illinois to Oklahoma?
Airfare is below average for this route at the moment.
Illinois to Oklahoma flights typically cost between $338 and $407 in September.The cheapest round-trip price found within the last 5 days was $160 on Frontier (Sep 26-Oct 5).
How far ahead should I book a flight from Illinois to Oklahoma?
The best time to book flights from Illinois to Oklahoma is 51 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 Illinois to Oklahoma?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Oklahoma. Price data was last updated on July 25, 2026.
Travelers seeking maximum savings on their Illinois to Oklahoma flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Oklahoma
Get insights into the airlines that provide service to Oklahoma. 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 Oklahoma. Reviews last updated August 2, 2026.
Peruse reviews from past customers who have flown with Southwest,United Airlines, andAmerican Airlines from Illinois to Oklahoma to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Boarding
8.1
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Boarding
8.1
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Boarding
8.1
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Boarding
8.1
Crew
8.6
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Related info for your journey
Find useful and relevant information for your journey from Illinois to Oklahoma. 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
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Alternative routes for Illinois to Oklahoma
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Oklahoma by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Oklahoma by cabin class
Find flights from Illinois to Oklahoma, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Oklahoma flights
Browse other Illinois and Oklahoma flight options. Last updated on August 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Oklahoma
Find the right flight back to Illinois after your stay in Oklahoma
Illinois to Oklahoma flights
Consider these flights traveling from Illinois to Oklahoma.
Top 4 airlines flying from Illinois to Oklahoma
Discover the top 4 airlines that operate flights from Illinois to Oklahoma. 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 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$81 | Average$252 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$122 | Average$388 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$232 | Average$401 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$246 | Average$374 | FlexibilityNo cancel fee | On-time71% |