$39+ 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 6/16. Fares are subject to change and may not be available on all flights or dates of travel.
OKC — ORD
Jun 5 — Jun 121
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 May 6, 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 May 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 5/1912:38 pm
DFW
- ORD
Nonstop2h 25m
Multiple Airlines
Wed 5/274:40 pm
ORD
- DFW
Nonstop3h 05m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Sat 8/229:39 am
DFW
- ORD
Nonstop2h 30m
Multiple Airlines
Mon 8/249:33 am
ORD
- DFW
Nonstop2h 41m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$121
This Frontier deal was found by Cheapflights users on 5/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:55 am
DFW
- MDW
Nonstop2h 17m
Frontier
Thu 6/43:07 pm
MDW
- DFW
Nonstop2h 43m
Frontier
Deal found 5/1![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Sat 7/49:39 am
DFW
- ORD
Nonstop2h 30m
Multiple Airlines
Thu 7/99:28 am
ORD
- DFW
Nonstop2h 52m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 5/1912:38 pm
DFW
- ORD
Nonstop2h 25m
Multiple Airlines
Thu 5/289:20 am
ORD
- DFW
Nonstop3h 01m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$125
This Cheapflightsfares deal was found by Cheapflights users on 5/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1912:38 pm
DFW
- ORD
Nonstop2h 25m
Spirit Airlines
Wed 5/208:00 am
ORD
- DFW
Nonstop2h 32m
Spirit Airlines
Deal found 5/1![Spirit Airlines logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Sat 5/1611:55 am
DFW
- MDW
Nonstop2h 17m
Frontier
Wed 5/203:07 pm
MDW
- DFW
Nonstop2h 43m
Frontier
Deal found 5/1![Frontier logo]()
$127
This Frontier deal was found by Cheapflights users on 5/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:26 pm
DFW
- ORD
Nonstop2h 40m
Frontier
Sat 5/3011:57 am
ORD
- DFW
Nonstop2h 54m
Frontier
Deal found 5/1![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 8/189:04 am
DFW
- ORD
1 stop11h 49m
Multiple Airlines
Sat 8/224:10 pm
ORD
- DFW
Nonstop2h 32m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$129
This Booking.com deal was found by Cheapflights users on 5/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:55 am
DFW
- MDW
Nonstop2h 17m
Frontier
Sun 5/313:07 pm
MDW
- DFW
Nonstop2h 43m
Frontier
Deal found 5/2![Frontier logo]()
$129
This Expedia deal was found by Cheapflights users on 5/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/610:17 pm
DFW
- STL
1 stop21h 06m
Frontier
Tue 6/167:03 pm
STL
- DFW
Nonstop1h 57m
Frontier
Deal found 5/4![Frontier logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Tue 6/28:55 am
DFW
- ORD
Nonstop2h 45m
Frontier
Sat 6/69:10 am
ORD
- DFW
Nonstop3h 01m
Frontier
Deal found 5/2![Frontier logo]()
$130
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 May 6, 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 May 6, 2026.
This Frontier deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 7/107:29 pm
OKC
- ORD
1 stop9h 59m
Frontier
Mon 7/137:15 am
ORD
- OKC
1 stop11h 25m
Frontier
Deal found 5/5![Frontier logo]()
$230
This United Airlines deal was found by Cheapflights users on 5/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:20 am
TUL
- ORD
Nonstop2h 02m
United Airlines
Tue 5/268:27 pm
ORD
- TUL
Nonstop2h 08m
United Airlines
Deal found 5/2![United Airlines logo]()
$230
This Delta deal was found by Cheapflights users on 5/2. 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 6/64:28 pm
TUL
- ORD
1 stop7h 40m
Delta
Wed 6/105:30 am
ORD
- TUL
1 stop6h 34m
Delta
Deal found 5/2![Delta logo]()
$250
This Southwest deal was found by Cheapflights users on 5/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:05 am
TUL
- ORD
2 stops7h 55m
Southwest
Mon 6/12:40 pm
ORD
- TUL
1 stop9h 00m
Southwest
Deal found 5/2![Southwest logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 7/47:48 pm
DFW
- RFD
1 stop14h 49m
Multiple Airlines
Thu 7/911:27 am
RFD
- DFW
1 stop10h 04m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$297
This American Airlines deal was found by Cheapflights users on 5/1. 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.
Mon 6/225:35 pm
DFW
- PIA
1 stop7h 03m
American Airlines
Sun 8/26:13 am
PIA
- DFW
Nonstop2h 19m
American Airlines
Deal found 5/1![American Airlines logo]()
$463
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 7/1410:04 am
TUL
- ORD
1 stop7h 08m
Delta
Tue 7/215:30 am
ORD
- TUL
1 stop6h 26m
Delta
Deal found 5/5![Delta logo]()
$257
This Southwest deal was found by Cheapflights users on 5/3. 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.
Thu 5/285:45 am
TUL
- ORD
2 stops7h 30m
Southwest
Mon 6/12:40 pm
ORD
- TUL
1 stop9h 00m
Southwest
Deal found 5/3![Southwest logo]()
$274
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 7/1410:04 am
TUL
- ORD
1 stop7h 08m
Delta
Wed 7/155:30 am
ORD
- TUL
1 stop6h 26m
Delta
Deal found 5/5![Delta logo]()
$257
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/29:45 am
DFW
- STL
1 stop6h 01m
United Airlines
Tue 6/99:14 am
STL
- DFW
1 stop5h 49m
United Airlines
Deal found 5/5![United Airlines logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 6/177:35 pm
DFW
- RFD
1 stop15h 02m
Multiple Airlines
Mon 6/229:10 pm
RFD
- DFW
1 stop21h 48m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$310
This Delta deal was found by Cheapflights users on 5/4. 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.
Mon 6/14:28 pm
TUL
- ORD
1 stop5h 25m
Delta
Mon 6/85:30 am
ORD
- TUL
1 stop6h 34m
Delta
Deal found 5/4![Delta logo]()
$263
This United Airlines deal was found by Cheapflights users on 5/1. 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.
Sat 6/65:24 pm
DFW
- STL
1 stop5h 21m
United Airlines
Tue 6/95:10 am
STL
- DFW
1 stop5h 29m
United Airlines
Deal found 5/1![United Airlines logo]()
$294
This Delta deal was found by Cheapflights users on 5/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:51 pm
TUL
- ORD
1 stop5h 08m
Delta
Thu 6/49:49 am
ORD
- TUL
1 stop5h 53m
Delta
Deal found 5/1![Delta logo]()
$263
This United Airlines deal was found by Cheapflights users on 5/3. 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.
Tue 6/26:30 pm
TUL
- ORD
Nonstop2h 10m
United Airlines
Wed 6/312:51 pm
ORD
- TUL
Nonstop2h 11m
United Airlines
Deal found 5/3![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 5/3. 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 6/23:15 pm
OKC
- MDW
Nonstop1h 50m
Southwest
Tue 6/911:15 am
MDW
- OKC
1 stop7h 45m
Southwest
Deal found 5/3![Southwest logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Fri 6/510:00 pm
DFW
- RFD
1 stop11h 17m
Multiple Airlines
Mon 6/89:10 pm
RFD
- DFW
1 stop19h 41m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$340
This Southwest deal was found by Cheapflights users on 5/3. 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.
Wed 6/173:25 pm
OKC
- MDW
1 stop5h 30m
Southwest
Tue 6/2310:30 am
MDW
- OKC
Nonstop2h 00m
Southwest
Deal found 5/3![Southwest logo]()
$329
This United Airlines deal was found by Cheapflights users on 5/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:04 am
TUL
- ORD
Nonstop2h 06m
United Airlines
Sat 5/233:43 pm
ORD
- TUL
Nonstop2h 07m
United Airlines
Deal found 5/2![United Airlines logo]()
$313
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 5/247:10 am
DFW
- STL
1 stop5h 46m
Delta
Sun 5/247:05 pm
STL
- DFW
1 stop5h 30m
Delta
Deal found 5/5![Delta logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 6/167:51 pm
DFW
- RFD
1 stop13h 26m
Multiple Airlines
Mon 6/229:10 pm
RFD
- DFW
1 stop21h 48m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 5/297:10 am
DFW
- STL
1 stop5h 10m
Delta
Fri 5/297:01 pm
STL
- DFW
1 stop5h 34m
Delta
Deal found 5/5![Delta logo]()
$285
This Southwest deal was found by Cheapflights users on 5/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/68:20 pm
OKC
- MDW
1 stop9h 05m
Southwest
Mon 6/89:30 pm
MDW
- OKC
Nonstop2h 00m
Southwest
Deal found 5/4![Southwest logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 6/410:00 pm
DFW
- RFD
1 stop21h 03m
Multiple Airlines
Sun 6/711:27 am
RFD
- DFW
1 stop22h 29m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 9/249:51 am
DFW
- STL
1 stop4h 26m
United Airlines
Sun 9/276:15 am
STL
- DFW
1 stop4h 49m
United Airlines
Deal found 5/5![United Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 5/3. 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 10/263:30 pm
XNA
- MDW
1 stop6h 15m
Delta
Sun 11/16:00 am
MDW
- XNA
1 stop5h 15m
Delta
Deal found 5/3![Delta logo]()
$289
This Southwest deal was found by Cheapflights users on 5/1. 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.
Tue 6/92:55 pm
OKC
- MDW
Nonstop1h 55m
Southwest
Thu 6/119:30 pm
MDW
- OKC
Nonstop2h 00m
Southwest
Deal found 5/1![Southwest logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 5/3. 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.
Fri 6/2610:20 pm
DFW
- RFD
1 stop13h 54m
Multiple Airlines
Mon 6/297:48 pm
RFD
- DFW
1 stop11h 51m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$365
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 7/1511:50 am
XNA
- MDW
1 stop6h 28m
Delta
Tue 7/215:10 pm
MDW
- XNA
1 stop5h 03m
Delta
Deal found 5/5![Delta logo]()
$289
This United Airlines deal was found by Cheapflights users on 5/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/287:10 am
OKC
- ORD
Nonstop2h 27m
United Airlines
Wed 7/19:03 am
ORD
- OKC
Nonstop2h 37m
United Airlines
Deal found 5/2![United Airlines logo]()
$356
Last-minute flights from Oklahoma to IllinoisDiscover last-minute flight deals from Oklahoma to Illinois. Data last updated May 6, 2026 and is based on user searches.
Discover last-minute flight deals from Oklahoma to Illinois. Data last updated May 6, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Sat 5/1611:55 am
DFW
- MDW
Nonstop2h 17m
Frontier
Wed 5/203:07 pm
MDW
- DFW
Nonstop2h 43m
Frontier
Deal found 5/1![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 5/1912:38 pm
DFW
- ORD
Nonstop2h 25m
Multiple Airlines
Wed 5/274:40 pm
ORD
- DFW
Nonstop3h 05m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 5/1912:38 pm
DFW
- ORD
Nonstop2h 25m
Multiple Airlines
Thu 5/289:20 am
ORD
- DFW
Nonstop3h 01m
Multiple Airlines
Deal found 5/1![Multiple Airlines logo]()
$125
This Cheapflightsfares deal was found by Cheapflights users on 5/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1912:38 pm
DFW
- ORD
Nonstop2h 25m
Spirit Airlines
Wed 5/208:00 am
ORD
- DFW
Nonstop2h 32m
Spirit Airlines
Deal found 5/1![Spirit Airlines logo]()
$127
This Frontier deal was found by Cheapflights users on 5/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2011:55 am
DFW
- MDW
Nonstop2h 17m
Frontier
Fri 5/293:07 pm
MDW
- DFW
Nonstop2h 43m
Frontier
Deal found 5/1![Frontier logo]()
$130
This Frontier deal was found by Cheapflights users on 5/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:55 am
DFW
- MDW
Nonstop2h 17m
Frontier
Thu 6/43:07 pm
MDW
- DFW
Nonstop2h 43m
Frontier
Deal found 5/1![Frontier logo]()
$121
This Frontier deal was found by Cheapflights users on 5/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:26 pm
DFW
- ORD
Nonstop2h 40m
Frontier
Sat 5/3011:57 am
ORD
- DFW
Nonstop2h 54m
Frontier
Deal found 5/1![Frontier logo]()
$128
This Booking.com deal was found by Cheapflights users on 5/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:55 am
DFW
- MDW
Nonstop2h 17m
Frontier
Sun 5/313:07 pm
MDW
- DFW
Nonstop2h 43m
Frontier
Deal found 5/2![Frontier logo]()
$129
This Frontier deal was found by Cheapflights users on 5/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/281:26 pm
DFW
- ORD
Nonstop2h 40m
Frontier
Thu 6/49:10 am
ORD
- DFW
Nonstop3h 01m
Frontier
Deal found 5/1![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 5/2. 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.
Tue 6/28:55 am
DFW
- ORD
Nonstop2h 45m
Frontier
Sat 6/69:10 am
ORD
- DFW
Nonstop3h 01m
Frontier
Deal found 5/2![Frontier logo]()
$130
This Super.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” 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 6/212:53 pm
DFW
- STL
Nonstop1h 55m
Frontier
Tue 6/97:29 pm
STL
- DFW
Nonstop1h 57m
Frontier
Deal found 5/5![Frontier logo]()
$131
This Expedia deal was found by Cheapflights users on 5/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/610:17 pm
DFW
- STL
1 stop21h 06m
Frontier
Tue 6/167:03 pm
STL
- DFW
Nonstop1h 57m
Frontier
Deal found 5/4![Frontier logo]()
$130
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 May 6, 2026.
Search for one-way flight options from Oklahoma to Illinois. Find affordable one-way fares based on user searches. Data last updated May 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/4. 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.
Tue 6/164:21 pm
DFW
- STL
Nonstop1h 57m
Frontier
Deal found 5/4![Frontier logo]()
$39
This Frontier deal was found by Cheapflights users on 5/2. 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.
Sat 5/305:36 pm
DFW
- STL
Nonstop1h 55m
Frontier
Deal found 5/2![Frontier logo]()
$40
This Frontier deal was found by Cheapflights users on 5/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/212:53 pm
DFW
- STL
Nonstop1h 55m
Frontier
Deal found 5/4![Frontier logo]()
$44
This Kiwi.com deal was found by Cheapflights users on 5/4. 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.
Tue 6/304:21 pm
DFW
- STL
Nonstop1h 57m
Frontier
Deal found 5/4![Frontier logo]()
$52
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/2112:36 pm
DFW
- STL
Nonstop1h 55m
Frontier
Deal found 5/4![Frontier logo]()
$53
This Super.com deal was found by Cheapflights users on 5/4. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2612:53 pm
DFW
- STL
Nonstop1h 55m
Frontier
Deal found 5/4![Frontier logo]()
$54
This CheapOair deal was found by Cheapflights users on 5/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/61:19 pm
DFW
- ORD
Nonstop2h 40m
Frontier
Deal found 5/2![Frontier logo]()
$54
This CheapOair deal was found by Cheapflights users on 5/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1512:49 pm
DFW
- MDW
Nonstop2h 26m
Frontier
Deal found 5/4![Frontier logo]()
$54
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 5/2611:55 am
DFW
- MDW
Nonstop2h 17m
Frontier
Deal found 5/3![Frontier logo]()
$62
This Cheapflightsfares deal was found by Cheapflights users on 5/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/49:39 am
DFW
- ORD
Nonstop2h 30m
Spirit Airlines
Deal found 5/1![Spirit Airlines logo]()
$63
This Kiwi.com deal was found by Cheapflights users on 5/1. 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 5/2011:55 am
DFW
- MDW
Nonstop2h 17m
Frontier
Deal found 5/1![Frontier logo]()
$63
This Trip.com deal was found by Cheapflights users on 5/1. 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.
Sat 5/1611:55 am
DFW
- MDW
Nonstop2h 17m
Frontier
Deal found 5/1![Frontier logo]()
$66
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 May 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $120 (Kiwi.com) |
One-way from | $39 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $393 |
Good round-trip deal | $377 or less |
Good one-way deal | $190 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 May 6, 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
Oklahoma CityChicago
OKC - ORD
OKCORD
Oklahoma City Will Rogers World
Fri 7/10
7:29 pm-5:28 am
1 stop9h 59m
Chicago O'Hare Intl
Mon 7/13
7:15 am-6:40 pm
1 stop11h 25m
$230
TulsaChicago
TUL - ORD
TULORD
Tulsa
Sat 5/23
7:20 am-9:22 am
Nonstop2h 02m
Chicago O'Hare Intl
Tue 5/26
8:27 pm-10:35 pm
Nonstop2h 08m
$230
TulsaChicago
TUL - ORD
TULORD
Tulsa
Sat 6/6
4:28 pm-12:08 am
1 stop7h 40m
Chicago O'Hare Intl
Wed 6/10
5:30 am-12:04 pm
1 stop6h 34m
$250
TulsaChicago
TUL - ORD
TULORD
Tulsa
Tue 7/14
10:04 am-5:12 pm
1 stop7h 08m
Chicago O'Hare Intl
Tue 7/21
5:30 am-11:56 am
1 stop6h 26m
$257
TulsaChicago
TUL - ORD
TULORD
Tulsa
Tue 7/14
10:04 am-5:12 pm
1 stop7h 08m
Chicago O'Hare Intl
Wed 7/15
5:30 am-11:56 am
1 stop6h 26m
$257
TulsaChicago
TUL - ORD
TULORD
Tulsa
Mon 6/1
4:28 pm-9:53 pm
1 stop5h 25m
Chicago O'Hare Intl
Mon 6/8
5:30 am-12:04 pm
1 stop6h 34m
$263
TulsaChicago
TUL - ORD
TULORD
Tulsa
Mon 6/1
6:51 pm-11:59 pm
1 stop5h 08m
Chicago O'Hare Intl
Thu 6/4
9:49 am-3:42 pm
1 stop5h 53m
$263
TulsaChicago
TUL - ORD
TULORD
Tulsa
Wed 5/27
7:05 am-3:00 pm
2 stops7h 55m
Chicago O'Hare Intl
Mon 6/1
2:40 pm-11:40 pm
1 stop9h 00m
$274
TulsaChicago
TUL - ORD
TULORD
Tulsa
Thu 5/28
5:45 am-1:15 pm
2 stops7h 30m
Chicago O'Hare Intl
Mon 6/1
2:40 pm-11:40 pm
1 stop9h 00m
$274
DallasSt. Louis
DFW - STL
DFWSTL
Dallas/Fort Worth
Sun 5/24
7:10 am-12:56 pm
1 stop5h 46m
Lambert-St Louis
Sun 5/24
7:05 pm-12:35 am
1 stop5h 30m
$285
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-ORD
DFW-MDW
DFW-STL
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-ORD
DFW-MDW
DFW-STL
DFW-RFD
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 47 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 month to book a flight from Oklahoma to Illinois?
Currently, July is the cheapest month in which you can book a flight from Oklahoma to Illinois (average of $84). Flying from Oklahoma to Illinois in May is currently the most expensive (average of $162). 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 May 6, 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 23% on your trip compared to booking a flight in the evening.
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 May 2, 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.
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 May 6, 2026.
The most flights from USOK to USIL are scheduled on a Monday (30 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (23 on average).
How much does it cost to fly round-trip from Oklahoma to Illinois?
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 May 6, 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
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
7.9
Food
7.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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 May 6, 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 May 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$138 | Average$200 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$189 | Average$373 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$197 | Average$376 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$230 | Average$382 | FlexibilityNo cancel fee | On-time69% |