$80+ Cheap flights from Orange County 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
SNA — ORD
May 1 — May 81
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Orange County to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Orange County to Illinois
Cheapest
Best
Last-minute
One-way
Cheapest flights from Orange County to IllinoisExplore the most affordable flight options available from Orange County to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2026.
Explore the most affordable flight options available from Orange County to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2026.
This CheapOair deal was found by Cheapflights users on 3/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:56 pm
SNA
- STL
1 stop13h 26m
Frontier
Sun 5/39:55 pm
STL
- SNA
1 stop19h 06m
Frontier
Deal found 3/29![Frontier logo]()
$210
This CheapOair deal was found by Cheapflights users on 3/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/126:22 pm
SNA
- STL
1 stop15h 05m
Frontier
Sun 4/199:55 pm
STL
- SNA
1 stop21h 31m
Frontier
Deal found 3/31![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Mon 4/137:20 pm
SNA
- STL
2 stops25h 59m
Frontier
Fri 4/178:06 pm
STL
- SNA
1 stop17h 19m
Frontier
Deal found 3/29![Frontier logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 5/79:54 am
SNA
- STL
1 stop7h 29m
Multiple Airlines
Tue 5/126:51 pm
STL
- SNA
1 stop22h 47m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Sat 5/212:10 pm
SNA
- STL
2 stops20h 21m
Multiple Airlines
Sun 5/39:55 pm
STL
- SNA
1 stop20h 25m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” 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 5/411:11 am
SNA
- STL
1 stop28h 55m
Multiple Airlines
Mon 5/119:18 pm
STL
- SNA
1 stop20h 05m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$258
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 5/2712:44 pm
LGB
- ORD
1 stop7h 06m
Delta
Thu 5/2811:09 am
ORD
- LGB
2 stops12h 34m
Delta
Deal found 3/26![Delta logo]()
$258
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 5/277:05 am
LGB
- MDW
2 stops12h 04m
Delta
Thu 5/2810:59 am
MDW
- LGB
2 stops12h 44m
Delta
Deal found 3/26![Delta logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:30 am
SNA
- STL
1 stop8h 36m
Multiple Airlines
Fri 5/158:08 pm
STL
- SNA
1 stop15h 01m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” 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 4/213:23 pm
SNA
- STL
2 stops29h 56m
Multiple Airlines
Sat 4/258:17 pm
STL
- SNA
1 stop16h 27m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$266
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” 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 5/2911:14 am
SNA
- STL
1 stop7h 12m
Multiple Airlines
Tue 6/28:08 pm
STL
- SNA
2 stops42h 11m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$268
This Expedia deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:56 pm
SNA
- STL
1 stop17h 25m
Frontier
Fri 5/18:06 pm
STL
- SNA
1 stop17h 19m
Frontier
Deal found 3/27![Frontier logo]()
$270
Best flights from Orange County to IllinoisDiscover carefully curated flight deals from Orange County to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 1, 2026.
Discover carefully curated flight deals from Orange County to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:48 pm
SNA
- RFD
1 stop22h 57m
Multiple Airlines
Sun 5/312:50 pm
RFD
- SNA
1 stop10h 55m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 3/29. 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.
Fri 5/13:35 pm
SNA
- ORD
1 stop7h 10m
United Airlines
Mon 5/47:52 pm
ORD
- SNA
Nonstop4h 43m
United Airlines
Deal found 3/29![United Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 3/30. 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.
Wed 5/207:40 pm
SNA
- MDW
1 stop7h 20m
Southwest
Wed 6/32:15 pm
MDW
- SNA
1 stop8h 20m
Southwest
Deal found 3/30![Southwest logo]()
$337
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 5/202:00 pm
SNA
- ORD
1 stop7h 59m
Delta
Sun 5/243:47 pm
ORD
- SNA
1 stop6h 47m
Delta
Deal found 3/26![Delta logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/252:39 pm
SNA
- STL
2 stops26h 42m
Frontier
Thu 4/309:55 pm
STL
- SNA
1 stop22h 01m
Frontier
Deal found 3/31![Frontier logo]()
$358
This Alaska Airlines deal was found by Cheapflights users on 3/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/273:09 pm
SNA
- ORD
Nonstop4h 31m
Alaska Airlines
Sat 7/411:55 am
ORD
- SNA
Nonstop4h 21m
Alaska Airlines
Deal found 3/31![Alaska Airlines logo]()
$429
This American Airlines deal was found by Cheapflights users on 3/30. 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 5/712:27 pm
SNA
- PIA
2 stops9h 10m
American Airlines
Tue 5/1212:12 pm
PIA
- SNA
2 stops7h 49m
American Airlines
Deal found 3/30![American Airlines logo]()
$442
This United Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” 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 8/266:45 am
SNA
- ORD
Nonstop4h 20m
United Airlines
Sun 8/305:00 am
ORD
- SNA
1 stop6h 15m
United Airlines
Deal found 3/27![United Airlines logo]()
$335
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 5/910:50 am
LGB
- ORD
2 stops10h 35m
Southwest
Tue 5/126:15 am
ORD
- LGB
2 stops9h 25m
Southwest
Deal found 3/26![Southwest logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” 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 6/278:10 pm
SNA
- RFD
1 stop14h 13m
Multiple Airlines
Wed 7/18:49 pm
RFD
- SNA
1 stop15h 54m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$350
This Delta deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1512:20 pm
SNA
- MLI
1 stop8h 10m
Delta
Wed 8/2611:00 am
MLI
- SNA
1 stop9h 20m
Delta
Deal found 3/30![Delta logo]()
$369
This Southwest deal was found by Cheapflights users on 3/28. 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.
Thu 6/45:00 pm
SNA
- MDW
1 stop6h 25m
Southwest
Tue 6/911:45 am
MDW
- SNA
2 stops7h 00m
Southwest
Deal found 3/28![Southwest logo]()
$342
This United Airlines deal was found by Cheapflights users on 3/29. 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.
Tue 6/164:00 pm
SNA
- ORD
1 stop6h 44m
United Airlines
Sun 6/215:00 am
ORD
- SNA
1 stop6h 07m
United Airlines
Deal found 3/29![United Airlines logo]()
$344
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 6/67:55 pm
LGB
- MDW
1 stop8h 05m
Southwest
Tue 6/95:30 am
MDW
- LGB
1 stop6h 05m
Southwest
Deal found 3/26![Southwest logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Wed 5/134:33 pm
SNA
- RFD
1 stop17h 27m
Multiple Airlines
Sun 5/1712:50 pm
RFD
- SNA
2 stops21h 15m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$382
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:45 am
SNA
- ORD
Nonstop4h 24m
United Airlines
Mon 7/134:20 pm
ORD
- SNA
Nonstop4h 32m
United Airlines
Deal found 3/30![United Airlines logo]()
$353
This Delta deal was found by Cheapflights users on 3/29. 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 5/1411:53 am
SNA
- STL
1 stop7h 16m
Delta
Tue 5/195:15 pm
STL
- SNA
1 stop7h 14m
Delta
Deal found 3/29![Delta logo]()
$406
This Southwest deal was found by Cheapflights users on 3/29. 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 5/112:20 pm
SNA
- MDW
2 stops7h 35m
Southwest
Tue 5/1210:10 am
MDW
- SNA
2 stops8h 50m
Southwest
Deal found 3/29![Southwest logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/74:33 pm
SNA
- PIA
1 stop18h 10m
Multiple Airlines
Sun 5/1012:18 pm
PIA
- SNA
2 stops26h 01m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$382
This Southwest deal was found by Cheapflights users on 3/29. 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 6/18:20 pm
LGB
- MDW
1 stop6h 40m
Southwest
Thu 6/41:15 pm
MDW
- LGB
Nonstop4h 15m
Southwest
Deal found 3/29![Southwest logo]()
$347
This American Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:26 pm
SNA
- MLI
2 stops7h 37m
American Airlines
Sun 9/137:20 am
MLI
- SNA
1 stop7h 36m
American Airlines
Deal found 3/31![American Airlines logo]()
$513
This Alaska Airlines deal was found by Cheapflights users on 3/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/112:21 pm
SNA
- STL
1 stop9h 38m
Alaska Airlines
Tue 5/54:46 pm
STL
- SNA
1 stop19h 39m
Alaska Airlines
Deal found 3/29![Alaska Airlines logo]()
$520
This United Airlines deal was found by Cheapflights users on 3/28. 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 7/1610:37 am
SNA
- ORD
Nonstop4h 16m
United Airlines
Sun 7/195:00 am
ORD
- SNA
1 stop6h 07m
United Airlines
Deal found 3/28![United Airlines logo]()
$400
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 4/1512:55 pm
LGB
- ORD
1 stop6h 23m
Delta
Thu 4/167:35 am
ORD
- LGB
1 stop6h 22m
Delta
Deal found 3/26![Delta logo]()
$443
This Southwest deal was found by Cheapflights users on 3/30. 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 5/287:00 pm
LGB
- MDW
1 stop8h 45m
Southwest
Tue 6/24:30 pm
MDW
- LGB
Nonstop4h 20m
Southwest
Deal found 3/30![Southwest logo]()
$347
This American Airlines deal was found by Cheapflights users on 3/29. 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.
Fri 5/223:08 pm
SNA
- MLI
1 stop6h 47m
American Airlines
Sun 5/246:00 am
MLI
- SNA
1 stop6h 41m
American Airlines
Deal found 3/29![American Airlines logo]()
$516
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Wed 6/243:50 pm
SNA
- RFD
1 stop18h 33m
Multiple Airlines
Sat 6/271:04 pm
RFD
- SNA
2 stops10h 03m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$444
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:00 am
LGB
- ORD
1 stop9h 04m
Delta
Fri 4/171:36 pm
ORD
- LGB
2 stops10h 06m
Delta
Deal found 3/31![Delta logo]()
$444
This United Airlines deal was found by Cheapflights users on 3/30. 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.
Tue 4/141:21 pm
SNA
- MLI
1 stop6h 11m
United Airlines
Sat 4/181:55 pm
MLI
- SNA
2 stops8h 53m
United Airlines
Deal found 3/30![United Airlines logo]()
$424
This American Airlines deal was found by Cheapflights users on 3/30. 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 5/296:45 am
SNA
- PIA
2 stops9h 40m
American Airlines
Sat 6/612:24 pm
PIA
- SNA
2 stops11h 56m
American Airlines
Deal found 3/30![American Airlines logo]()
$523
Last-minute flights from Orange County to IllinoisDiscover last-minute flight deals from Orange County to Illinois. Data last updated April 1, 2026 and is based on user searches.
Discover last-minute flight deals from Orange County to Illinois. Data last updated April 1, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 4/92:53 pm
SNA
- ORD
2 stops21h 23m
Multiple Airlines
Tue 4/148:58 pm
ORD
- SNA
1 stop19h 30m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$306
This CheapOair deal was found by Cheapflights users on 3/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/126:22 pm
SNA
- STL
1 stop15h 05m
Frontier
Sun 4/199:55 pm
STL
- SNA
1 stop21h 31m
Frontier
Deal found 3/31![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Mon 4/137:20 pm
SNA
- STL
2 stops25h 59m
Frontier
Fri 4/178:06 pm
STL
- SNA
1 stop17h 19m
Frontier
Deal found 3/29![Frontier logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” 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 4/156:45 am
SNA
- STL
2 stops25h 45m
Multiple Airlines
Sat 4/188:17 pm
STL
- SNA
1 stop16h 27m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$302
This Trip.com deal was found by Cheapflights users on 3/30. 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 4/1611:29 am
SNA
- STL
1 stop5h 52m
Frontier
Sun 4/269:55 pm
STL
- SNA
1 stop22h 01m
Frontier
Deal found 3/30![Frontier logo]()
$301
This CheapOair deal was found by Cheapflights users on 3/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/183:23 pm
SNA
- ORD
1 stop12h 02m
Spirit Airlines
Mon 4/205:15 am
ORD
- SNA
2 stops18h 30m
Spirit Airlines
Deal found 3/28![Spirit Airlines logo]()
$309
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” 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 4/213:23 pm
SNA
- STL
2 stops29h 56m
Multiple Airlines
Sat 4/258:17 pm
STL
- SNA
1 stop16h 27m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$266
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/233:23 pm
SNA
- STL
2 stops29h 56m
Multiple Airlines
Sun 4/268:06 pm
STL
- SNA
1 stop16h 38m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$306
This Expedia deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/247:56 pm
SNA
- STL
1 stop17h 25m
Frontier
Fri 5/18:06 pm
STL
- SNA
1 stop17h 19m
Frontier
Deal found 3/27![Frontier logo]()
$270
This CheapOair deal was found by Cheapflights users on 3/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:45 am
SNA
- ORD
2 stops14h 42m
Spirit Airlines
Sat 5/28:00 am
ORD
- SNA
2 stops15h 45m
Spirit Airlines
Deal found 3/28![Spirit Airlines logo]()
$308
This CheapOair deal was found by Cheapflights users on 3/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:56 pm
SNA
- STL
1 stop13h 26m
Frontier
Sun 5/39:55 pm
STL
- SNA
1 stop19h 06m
Frontier
Deal found 3/29![Frontier logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:00 am
SNA
- STL
1 stop10h 00m
Multiple Airlines
Thu 5/73:33 pm
STL
- SNA
2 stops22h 46m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$305
One-way flights from Orange County to IllinoisSearch for one-way flight options from Orange County to Illinois. Find affordable one-way fares based on user searches. Data last updated April 1, 2026.
Search for one-way flight options from Orange County to Illinois. Find affordable one-way fares based on user searches. Data last updated April 1, 2026.
This CheapOair deal was found by Cheapflights users on 3/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/79:54 am
SNA
- STL
1 stop7h 29m
Frontier
Deal found 3/28![Frontier logo]()
$80
This Expedia deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/159:54 am
SNA
- STL
1 stop7h 29m
Frontier
Deal found 3/30![Frontier logo]()
$105
This Expedia deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:56 pm
SNA
- STL
1 stop17h 25m
Frontier
Deal found 3/27![Frontier logo]()
$111
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 6/212:44 pm
LGB
- ORD
1 stop7h 06m
Delta
Deal found 3/26![Delta logo]()
$119
This Frontier deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2411:29 am
SNA
- STL
1 stop5h 52m
Frontier
Deal found 3/31![Frontier logo]()
$125
This CheapOair deal was found by Cheapflights users on 3/31. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/912:19 pm
SNA
- STL
1 stop19h 29m
Frontier
Deal found 3/31![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/277:56 pm
SNA
- STL
2 stops32h 54m
Frontier
Deal found 3/30![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 4/307:30 am
SNA
- STL
1 stop25h 52m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$135
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 4/1412:55 pm
LGB
- ORD
1 stop6h 23m
Delta
Deal found 3/26![Delta logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” 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 5/16:45 am
SNA
- STL
2 stops34h 47m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$140
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” 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 4/167:00 am
LGB
- ORD
1 stop9h 04m
Delta
Deal found 3/26![Delta logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 3/29. 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.
Wed 6/37:45 am
SNA
- STL
1 stop8h 21m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$150
Find flight deals from Orange County to Illinois
Keep the following information in mind while searching for Orange County to Illinois flight deals. Data was last updated April 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $210 (CheapOair) |
One-way from | $80 (CheapOair) |
Popular in | February |
Cheapest in | September |
Average price | $282 |
Cheapflights Fare Finder
Customize your flight search to find flights from Orange County 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 April 1, 2026.
Use the filters below to find and compare flights from Orange County to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Santa AnaChicago
SNA - RFD
SNARFD
Santa Ana J. Wayne/Orange Cnty
Thu 4/30
6:48 pm-7:45 pm
1 stop22h 57m
Chicago Greater Rockford
Sun 5/3
12:50 pm-9:45 pm
1 stop10h 55m
$328
Santa AnaChicago
SNA - ORD
SNAORD
Santa Ana J. Wayne/Orange Cnty
Fri 5/1
3:35 pm-12:45 am
1 stop7h 10m
Chicago O'Hare Intl
Mon 5/4
7:52 pm-10:35 pm
Nonstop4h 43m
$333
Santa AnaChicago
SNA - ORD
SNAORD
Santa Ana J. Wayne/Orange Cnty
Wed 8/26
6:45 am-1:05 pm
Nonstop4h 20m
Chicago O'Hare Intl
Sun 8/30
5:00 am-9:15 am
1 stop6h 15m
$335
Santa AnaChicago
SNA - MDW
SNAMDW
Santa Ana J. Wayne/Orange Cnty
Wed 5/20
7:40 pm-5:00 am
1 stop7h 20m
Chicago Midway
Wed 6/3
2:15 pm-8:35 pm
1 stop8h 20m
$337
Long BeachChicago
LGB - ORD
LGBORD
Long Beach Municipal
Sat 5/9
10:50 am-11:25 pm
2 stops10h 35m
Chicago O'Hare Intl
Tue 5/12
6:15 am-1:40 pm
2 stops9h 25m
$337
Santa AnaChicago
SNA - MDW
SNAMDW
Santa Ana J. Wayne/Orange Cnty
Thu 6/4
5:00 pm-1:25 am
1 stop6h 25m
Chicago Midway
Tue 6/9
11:45 am-4:45 pm
2 stops7h 00m
$342
Long BeachChicago
LGB - MDW
LGBMDW
Long Beach Municipal
Sat 6/6
7:55 pm-6:00 am
1 stop8h 05m
Chicago Midway
Tue 6/9
5:30 am-9:35 am
1 stop6h 05m
$342
Santa AnaChicago
SNA - ORD
SNAORD
Santa Ana J. Wayne/Orange Cnty
Tue 6/16
4:00 pm-12:44 am
1 stop6h 44m
Chicago O'Hare Intl
Sun 6/21
5:00 am-9:07 am
1 stop6h 07m
$344
Santa AnaChicago
SNA - MDW
SNAMDW
Santa Ana J. Wayne/Orange Cnty
Mon 5/11
2:20 pm-11:55 pm
2 stops7h 35m
Chicago Midway
Tue 5/12
10:10 am-5:00 pm
2 stops8h 50m
$347
Long BeachChicago
LGB - MDW
LGBMDW
Long Beach Municipal
Mon 6/1
8:20 pm-5:00 am
1 stop6h 40m
Chicago Midway
Thu 6/4
1:15 pm-3:30 pm
Nonstop4h 15m
$347
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Orange County to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Orange County with our price prediction graph.
SNA-STL
LGB-ORD
LGB-MDW
SNA-ORD
SNA-RFD
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 Orange County to Illinois
zzKFI-USIL
SNA-STL
LGB-ORD
LGB-MDW
SNA-ORD
What is the cheapest month to book a flight from Orange County to Illinois?
Currently, November is the cheapest month in which you can book a flight from Orange County to Illinois (average of $203). Flying from Orange County to Illinois in April is currently the most expensive (average of $271). 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 KFI to IL?
Find hourly flight availability from Orange County 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 April 1, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Orange County to Illinois as you normally would.
Weekly flight availability from Orange County to Illinois
Explore weekly flight availability from Orange County 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 April 1, 2026.
The most flights from zzKFI to USIL are scheduled on a Wednesday (25 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 on average).
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 April 1, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andUnited Airlines from Orange County to Illinois. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from Orange County to Illinois. 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
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Return Flight Options
Top destinations
Alternative routes for Orange County 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 Orange County to Illinois by cabin class
Find flights from Orange County to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Orange County and Illinois flights
Browse other Orange County and Illinois flight options. Last updated on April 1, 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 Orange County after your stay in Illinois
Orange County to Illinois flights
Consider these flights traveling from Orange County to Illinois.
Top 7 airlines flying from Orange County to Illinois
Discover the top 7 airlines that operate flights from Orange County 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 April 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$103 | Average$195 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$152 | Average$218 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$190 | Average$460 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$228 | Average$462 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$258 | Average$328 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$269 | Average$476 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$288 | Average$446 | FlexibilityNo cancel fee | On-time63% |