$53+ 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 9/13. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Jul 19 — Jul 261
Round-trip
1 adult, Economy
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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 June 19, 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 June 19, 2026.
This Frontier deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:49 pm
DFW
- STL
Nonstop1h 59m
Frontier
Sun 9/136:41 pm
STL
- DFW
Nonstop2h 05m
Frontier
Deal found 6/15![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 6/17. 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.
Thu 9/103:48 pm
DFW
- STL
Nonstop1h 56m
Frontier
Sun 9/136:41 pm
STL
- DFW
Nonstop2h 05m
Frontier
Deal found 6/17![Frontier logo]()
$137
This Super.com deal was found by Cheapflights users on 6/15. 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.
Tue 9/112:49 pm
DFW
- STL
Nonstop1h 59m
Frontier
Wed 9/23:33 pm
STL
- DFW
Nonstop1h 55m
Frontier
Deal found 6/15![Frontier logo]()
$142
This Super.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Tue 7/143:41 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 6/18![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Tue 7/283:41 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 6/19![Frontier logo]()
$147
This Frontier deal was found by Cheapflights users on 6/16. 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.
Tue 8/1812:49 pm
DFW
- STL
Nonstop1h 59m
Frontier
Wed 8/193:33 pm
STL
- DFW
Nonstop1h 55m
Frontier
Deal found 6/16![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:48 pm
DFW
- STL
Nonstop1h 56m
Frontier
Mon 10/56:41 pm
STL
- DFW
Nonstop2h 05m
Frontier
Deal found 6/18![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 9/169:50 pm
DFW
- ORD
Nonstop2h 34m
Frontier
Mon 9/281:22 pm
ORD
- DFW
Nonstop2h 46m
Frontier
Deal found 6/15![Frontier logo]()
$152
This Frontier deal was found by Cheapflights users on 6/14. 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.
Tue 8/42:30 pm
DFW
- MDW
Nonstop2h 21m
Frontier
Fri 8/146:17 pm
MDW
- DFW
Nonstop2h 37m
Frontier
Deal found 6/14![Frontier logo]()
$152
This Frontier deal was found by Cheapflights users on 6/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/283:48 pm
DFW
- STL
Nonstop1h 56m
Frontier
Thu 10/16:41 pm
STL
- DFW
Nonstop2h 05m
Frontier
Deal found 6/15![Frontier logo]()
$153
This Booking.com deal was found by Cheapflights users on 6/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/41:25 pm
DFW
- ORD
Nonstop2h 43m
Frontier
Fri 8/79:20 am
ORD
- DFW
Nonstop2h 52m
Frontier
Deal found 6/14![Frontier logo]()
$153
This Booking.com deal was found by Cheapflights users on 6/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/42:30 pm
DFW
- MDW
Nonstop2h 21m
Frontier
Fri 8/76:17 pm
MDW
- DFW
Nonstop2h 37m
Frontier
Deal found 6/14![Frontier logo]()
$153
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 June 19, 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 June 19, 2026.
This Delta deal was found by Cheapflights users on 6/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:36 pm
TUL
- ORD
1 stop5h 56m
Delta
Tue 11/39:30 am
ORD
- TUL
1 stop5h 49m
Delta
Deal found 6/14![Delta logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:07 am
DFW
- STL
1 stop10h 16m
Frontier
Fri 8/144:57 pm
STL
- DFW
1 stop19h 33m
Frontier
Deal found 6/19![Frontier logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 6/16. 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.
Sat 7/111:53 pm
DFW
- RFD
1 stop20h 44m
Multiple Airlines
Thu 7/1611:27 am
RFD
- DFW
1 stop9h 39m
Multiple Airlines
Deal found 6/16![Multiple Airlines logo]()
$258
This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/227:15 am
TUL
- ORD
Nonstop2h 02m
United Airlines
Sun 7/268:45 am
ORD
- TUL
Nonstop2h 18m
United Airlines
Deal found 6/18![United Airlines logo]()
$299
This Southwest deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:40 am
OKC
- MDW
2 stops9h 20m
Southwest
Sat 8/2910:15 am
MDW
- OKC
2 stops9h 20m
Southwest
Deal found 6/18![Southwest logo]()
$312
This American Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:06 am
XNA
- ORD
Nonstop2h 06m
American Airlines
Tue 7/216:46 am
ORD
- XNA
Nonstop1h 58m
American Airlines
Deal found 6/14![American Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:20 am
DFW
- STL
1 stop6h 26m
Delta
Mon 8/1011:13 am
STL
- DFW
1 stop6h 04m
Delta
Deal found 6/19![Delta logo]()
$277
This United Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/256:00 am
TUL
- ORD
Nonstop2h 00m
United Airlines
Tue 9/298:45 am
ORD
- TUL
Nonstop2h 18m
United Airlines
Deal found 6/17![United Airlines logo]()
$299
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:00 am
OKC
- MDW
Nonstop1h 55m
Southwest
Wed 8/510:30 am
MDW
- OKC
2 stops10h 20m
Southwest
Deal found 6/14![Southwest logo]()
$316
This Delta deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2111:45 am
XNA
- MDW
1 stop6h 16m
Delta
Mon 8/249:59 am
MDW
- XNA
1 stop6h 19m
Delta
Deal found 6/17![Delta logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 6/14. 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 8/610:23 pm
DFW
- RFD
1 stop22h 11m
Multiple Airlines
Mon 8/106:26 pm
RFD
- DFW
2 stops21h 41m
Multiple Airlines
Deal found 6/14![Multiple Airlines logo]()
$338
This Delta deal was found by Cheapflights users on 6/15. 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.
Sat 7/2511:50 am
XNA
- MDW
1 stop6h 02m
Delta
Fri 7/315:10 pm
MDW
- XNA
1 stop6h 40m
Delta
Deal found 6/15![Delta logo]()
$289
This Super.com deal was found by Cheapflights users on 6/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/264:21 pm
DFW
- STL
Nonstop1h 57m
Frontier
Sun 6/282:56 pm
STL
- DFW
1 stop19h 55m
Frontier
Deal found 6/14![Frontier logo]()
$350
This American Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/141:42 pm
OKC
- ORD
Nonstop2h 26m
American Airlines
Fri 7/178:16 am
ORD
- OKC
Nonstop2h 18m
American Airlines
Deal found 6/18![American Airlines logo]()
$358
This Southwest deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:15 am
OKC
- MDW
Nonstop1h 50m
Southwest
Mon 8/105:30 pm
MDW
- OKC
1 stop5h 20m
Southwest
Deal found 6/17![Southwest logo]()
$327
This United Airlines deal was found by Cheapflights users on 6/15. 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 9/19:36 am
DFW
- STL
1 stop4h 39m
United Airlines
Wed 9/29:30 am
STL
- DFW
2 stops8h 21m
United Airlines
Deal found 6/15![United Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1710:23 pm
DFW
- RFD
1 stop13h 45m
Multiple Airlines
Sun 7/199:19 am
RFD
- DFW
2 stops8h 36m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$344
This Delta deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:10 am
XNA
- MDW
1 stop7h 34m
Delta
Sat 9/54:39 pm
MDW
- XNA
1 stop7h 17m
Delta
Deal found 6/18![Delta logo]()
$289
This Southwest deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/43:20 pm
OKC
- MDW
Nonstop1h 50m
Southwest
Fri 8/710:35 am
MDW
- OKC
Nonstop2h 00m
Southwest
Deal found 6/18![Southwest logo]()
$334
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Thu 7/239:45 am
DFW
- ORD
Nonstop2h 41m
United Airlines
Sun 7/267:15 am
ORD
- DFW
Nonstop2h 43m
United Airlines
Deal found 6/17![United Airlines logo]()
$345
This Delta deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:10 am
XNA
- MDW
1 stop7h 34m
Delta
Sun 9/64:39 pm
MDW
- XNA
1 stop4h 49m
Delta
Deal found 6/18![Delta logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/110:00 am
DFW
- RFD
2 stops24h 37m
Multiple Airlines
Wed 8/58:58 pm
RFD
- DFW
1 stop24h 20m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$359
This Southwest deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:00 am
OKC
- MDW
2 stops9h 40m
Southwest
Mon 9/1410:05 am
MDW
- OKC
2 stops5h 45m
Southwest
Deal found 6/17![Southwest logo]()
$347
This United Airlines deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:37 pm
XNA
- ORD
Nonstop2h 03m
United Airlines
Sat 7/188:40 am
ORD
- XNA
Nonstop1h 59m
United Airlines
Deal found 6/14![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:10 am
XNA
- MDW
1 stop7h 34m
Delta
Tue 9/84:30 pm
MDW
- XNA
1 stop7h 28m
Delta
Deal found 6/18![Delta logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1610:23 pm
DFW
- RFD
1 stop22h 00m
Multiple Airlines
Mon 7/207:50 pm
RFD
- DFW
2 stops16h 40m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$374
This Southwest deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/63:05 pm
OKC
- MDW
Nonstop1h 55m
Southwest
Mon 10/129:25 pm
MDW
- OKC
Nonstop2h 05m
Southwest
Deal found 6/17![Southwest logo]()
$347
This American Airlines deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:10 pm
DFW
- PIA
Nonstop2h 05m
American Airlines
Sun 9/205:28 pm
PIA
- DFW
1 stop6h 09m
American Airlines
Deal found 6/17![American Airlines logo]()
$463
This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:45 pm
XNA
- ORD
Nonstop2h 10m
United Airlines
Sat 9/1211:59 am
ORD
- XNA
Nonstop1h 55m
United Airlines
Deal found 6/18![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:10 am
XNA
- MDW
1 stop7h 34m
Delta
Wed 9/911:35 am
MDW
- XNA
1 stop6h 47m
Delta
Deal found 6/18![Delta logo]()
$289
Last-minute flights from Oklahoma to IllinoisDiscover last-minute flight deals from Oklahoma to Illinois. Data last updated June 19, 2026 and is based on user searches.
Discover last-minute flight deals from Oklahoma to Illinois. Data last updated June 19, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/309:00 am
DFW
- ORD
Nonstop2h 33m
Frontier
Sat 7/49:10 am
ORD
- DFW
Nonstop2h 47m
Frontier
Deal found 6/18![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/309:00 am
DFW
- ORD
Nonstop2h 33m
Frontier
Wed 7/89:28 am
ORD
- DFW
Nonstop2h 52m
Frontier
Deal found 6/18![Frontier logo]()
$177
This Super.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Tue 7/143:41 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 6/18![Frontier logo]()
$146
This Super.com deal was found by Cheapflights users on 6/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/111:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Tue 7/143:41 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 6/14![Frontier logo]()
$169
This Super.com deal was found by Cheapflights users on 6/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/151:25 pm
DFW
- ORD
Nonstop2h 43m
Frontier
Thu 8/139:20 am
ORD
- DFW
Nonstop2h 52m
Frontier
Deal found 6/14![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 6/15. 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.
Fri 7/174:16 pm
DFW
- STL
1 stop16h 41m
Frontier
Tue 7/213:41 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 6/15![Frontier logo]()
$173
This deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/181:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Tue 7/213:41 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 6/18![Frontier logo]()
$170
This Super.com deal was found by Cheapflights users on 6/16. 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.
Tue 7/211:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Thu 7/233:41 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 6/16![Frontier logo]()
$174
This Super.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/231:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Tue 7/283:41 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 6/18![Frontier logo]()
$172
This Frontier deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/251:25 pm
DFW
- ORD
Nonstop2h 43m
Frontier
Tue 7/289:28 am
ORD
- DFW
Nonstop2h 52m
Frontier
Deal found 6/19![Frontier logo]()
$182
This Frontier deal was found by Cheapflights users on 6/16. 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.
Tue 7/281:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Thu 8/63:41 pm
STL
- DFW
Nonstop2h 02m
Frontier
Deal found 6/16![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/281:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Fri 8/74:57 pm
STL
- DFW
1 stop23h 10m
Frontier
Deal found 6/16![Frontier logo]()
$164
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 June 19, 2026.
Search for one-way flight options from Oklahoma to Illinois. Find affordable one-way fares based on user searches. Data last updated June 19, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 9/133:48 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 6/16![Frontier logo]()
$53
This Kiwi.com deal was found by Cheapflights users on 6/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/71:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 6/16![Frontier logo]()
$73
This Frontier deal was found by Cheapflights users on 6/16. 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.
Tue 8/111:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 6/16![Frontier logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 8/111:17 pm
DFW
- ORD
Nonstop2h 43m
Frontier
Deal found 6/15![Frontier logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 6/17. 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.
Thu 10/19:44 am
DFW
- MDW
Nonstop2h 23m
Frontier
Deal found 6/17![Frontier logo]()
$77
This Super.com deal was found by Cheapflights users on 6/17. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/131:00 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 6/17![Frontier logo]()
$83
This Frontier deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/143:48 pm
DFW
- STL
Nonstop1h 56m
Frontier
Deal found 6/19![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/199:44 am
DFW
- MDW
Nonstop2h 23m
Frontier
Deal found 6/19![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:19 am
DFW
- STL
1 stop11h 18m
Frontier
Deal found 6/18![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 6/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/128:55 pm
DFW
- STL
1 stop12h 45m
Frontier
Deal found 6/17![Frontier logo]()
$87
This Super.com deal was found by Cheapflights users on 6/15. 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.
Sat 9/129:50 pm
DFW
- ORD
Nonstop2h 34m
Frontier
Deal found 6/15![Frontier logo]()
$88
This Kiwi.com deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/71:17 pm
DFW
- ORD
Nonstop2h 43m
Frontier
Deal found 6/18![Frontier logo]()
$91
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 June 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $128 (Frontier) |
One-way from | $53 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $436 |
Good round-trip deal | $375 or less |
Good one-way deal | $229 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 June 19, 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
TulsaChicago
TUL - ORD
TULORD
Tulsa
Tue 10/20
12:36 pm-6:32 pm
1 stop5h 56m
Chicago O'Hare Intl
Tue 11/3
9:30 am-3:19 pm
1 stop5h 49m
$237
DallasSt. Louis
DFW - STL
DFWSTL
Dallas/Fort Worth
Mon 8/10
9:07 am-7:23 pm
1 stop10h 16m
Lambert-St Louis
Fri 8/14
4:57 pm-12:30 pm
1 stop19h 33m
$242
DallasChicago
DFW - RFD
DFWRFD
Dallas/Fort Worth
Sat 7/11
1:53 pm-10:37 am
1 stop20h 44m
Chicago Greater Rockford
Thu 7/16
11:27 am-9:06 pm
1 stop9h 39m
$258
DallasSt. Louis
DFW - STL
DFWSTL
Dallas/Fort Worth
Thu 8/6
5:20 am-11:46 am
1 stop6h 26m
Lambert-St Louis
Mon 8/10
11:13 am-5:17 pm
1 stop6h 04m
$277
FayettevilleChicago
XNA - MDW
XNAMDW
Fayetteville Northwest Arkansas
Fri 8/21
11:45 am-6:01 pm
1 stop6h 16m
Chicago Midway
Mon 8/24
9:59 am-4:18 pm
1 stop6h 19m
$289
FayettevilleChicago
XNA - MDW
XNAMDW
Fayetteville Northwest Arkansas
Sat 7/25
11:50 am-5:52 pm
1 stop6h 02m
Chicago Midway
Fri 7/31
5:10 pm-11:50 pm
1 stop6h 40m
$289
FayettevilleChicago
XNA - MDW
XNAMDW
Fayetteville Northwest Arkansas
Tue 9/1
8:10 am-3:44 pm
1 stop7h 34m
Chicago Midway
Sat 9/5
4:39 pm-11:56 pm
1 stop7h 17m
$289
FayettevilleChicago
XNA - MDW
XNAMDW
Fayetteville Northwest Arkansas
Tue 9/1
8:10 am-3:44 pm
1 stop7h 34m
Chicago Midway
Sun 9/6
4:39 pm-9:28 pm
1 stop4h 49m
$289
FayettevilleChicago
XNA - MDW
XNAMDW
Fayetteville Northwest Arkansas
Tue 9/1
8:10 am-3:44 pm
1 stop7h 34m
Chicago Midway
Tue 9/8
4:30 pm-11:58 pm
1 stop7h 28m
$289
FayettevilleChicago
XNA - MDW
XNAMDW
Fayetteville Northwest Arkansas
Sat 9/5
8:10 am-3:44 pm
1 stop7h 34m
Chicago Midway
Wed 9/9
11:35 am-6:22 pm
1 stop6h 47m
$289
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-ORD
DFW-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-ORD
DFW-MDW
DFW-RFD
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 $93). Flying from Oklahoma to Illinois in June is currently the most expensive (average of $209). 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 June 19, 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 19% on your trip compared to booking a flight in the evening.
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 June 19, 2026.
The most flights from USOK to USIL are scheduled on a Monday (30 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).
How much does it cost to fly round-trip from Oklahoma to Illinois?
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 79 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 June 13, 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 June 19, 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.
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
7.9
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
7.9
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
7.9
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
7.9
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Comfort
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
7.9
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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 June 19, 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 June 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$182 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$196 | Average$421 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$197 | Average$392 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$230 | Average$390 | FlexibilityNo cancel fee | On-time69% |