$108+ Cheap flights from California 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ORD
Jul 13 — Jul 201
Round-trip
1 adult, Economy
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Cheapest flights from California to IllinoisExplore the most affordable flight options available from California to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 13, 2026.
Explore the most affordable flight options available from California to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 13, 2026.
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 9/226:45 am
LAX
- MDW
2 stops7h 15m
Southwest
Tue 10/63:30 pm
MDW
- LAX
Nonstop4h 25m
Southwest
Deal found 6/9![Southwest logo]()
$223
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 9/97:45 am
LAX
- ORD
Nonstop4h 15m
Delta
Sat 9/125:00 pm
ORD
- LAX
1 stop6h 55m
Delta
Deal found 6/9![Delta logo]()
$223
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/128:25 am
LAX
- MDW
2 stops6h 45m
Southwest
Sat 8/158:45 pm
MDW
- LAX
Nonstop4h 20m
Southwest
Deal found 6/10![Southwest logo]()
$224
This Mytrip deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/38:49 pm
LAX
- ORD
1 stop22h 03m
Frontier
Tue 8/119:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 6/11![Frontier logo]()
$224
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 9/296:45 am
LAX
- MDW
2 stops7h 15m
Southwest
Sat 10/38:00 pm
MDW
- LAX
Nonstop4h 15m
Southwest
Deal found 6/10![Southwest logo]()
$225
This Frontier deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 8/411:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Sun 8/99:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 6/11![Frontier logo]()
$226
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 8/1911:55 pm
LAS
- ORD
Nonstop3h 30m
United Airlines
Tue 8/2511:00 am
ORD
- LAS
Nonstop4h 07m
United Airlines
Deal found 6/10![United Airlines logo]()
$227
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:25 am
LAX
- MDW
2 stops6h 45m
Southwest
Wed 9/163:10 pm
MDW
- LAX
1 stop6h 00m
Southwest
Deal found 6/10![Southwest logo]()
$227
This Frontier deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 8/411:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Fri 8/149:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 6/9![Frontier logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 8/511:49 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Tue 8/117:05 am
ORD
- LAS
2 stops15h 31m
Frontier
Deal found 6/8![Frontier logo]()
$228
This Frontier deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/311:59 pm
LAX
- ORD
Nonstop4h 20m
Frontier
Sat 7/49:13 pm
ORD
- LAX
Nonstop4h 36m
Frontier
Deal found 6/10![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/711:49 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Tue 7/149:13 pm
ORD
- LAS
1 stop12h 38m
Frontier
Deal found 6/10![Frontier logo]()
$229
Best flights from California to IllinoisDiscover carefully curated flight deals from California to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 13, 2026.
Discover carefully curated flight deals from California to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 13, 2026.
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/287:15 am
LAX
- ORD
1 stop9h 14m
Delta
Wed 8/128:28 am
ORD
- LAX
1 stop8h 36m
Delta
Deal found 6/10![Delta logo]()
$238
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 8/41:25 pm
LAX
- MDW
1 stop5h 40m
Southwest
Tue 8/118:45 pm
MDW
- LAX
Nonstop4h 20m
Southwest
Deal found 6/8![Southwest logo]()
$252
This Alaska Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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.
Wed 7/226:50 am
LAS
- ORD
1 stop10h 07m
Alaska Airlines
Tue 8/116:20 am
ORD
- LAS
1 stop9h 38m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$259
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:55 pm
LAS
- ORD
Nonstop3h 30m
United Airlines
Sat 8/223:56 pm
ORD
- LAS
1 stop6h 55m
United Airlines
Deal found 6/10![United Airlines logo]()
$285
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/155:15 pm
LAX
- ORD
Nonstop4h 03m
Delta
Wed 7/226:35 pm
ORD
- LAX
Nonstop4h 37m
Delta
Deal found 6/10![Delta logo]()
$239
This Alaska Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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.
Wed 8/127:59 am
LAS
- ORD
1 stop8h 58m
Alaska Airlines
Mon 8/178:20 pm
ORD
- LAS
1 stop16h 09m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$270
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 8/2912:12 pm
LAX
- MDW
1 stop8h 24m
Delta
Mon 8/316:05 am
MDW
- LAX
1 stop9h 57m
Delta
Deal found 6/10![Delta logo]()
$249
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/1411:55 pm
LAX
- MDW
Nonstop4h 00m
Southwest
Tue 7/215:30 am
MDW
- LAX
Nonstop4h 15m
Southwest
Deal found 6/10![Southwest logo]()
$295
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 7/712:13 am
LAX
- ORD
Nonstop4h 19m
United Airlines
Wed 7/89:30 pm
ORD
- LAX
Nonstop4h 39m
United Airlines
Deal found 6/8![United Airlines logo]()
$295
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 9/511:08 am
LAX
- ORD
1 stop7h 47m
Delta
Sat 9/125:00 pm
ORD
- LAX
1 stop6h 55m
Delta
Deal found 6/10![Delta logo]()
$249
This Alaska Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 8/157:59 am
LAS
- ORD
1 stop9h 38m
Alaska Airlines
Thu 8/202:18 pm
ORD
- LAS
1 stop10h 17m
Alaska Airlines
Deal found 6/12![Alaska Airlines logo]()
$285
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 8/289:40 am
LAX
- ORD
1 stop6h 49m
Delta
Wed 9/26:00 am
ORD
- LAX
1 stop9h 15m
Delta
Deal found 6/11![Delta logo]()
$253
This Alaska Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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.
Wed 8/126:50 am
SAN
- ORD
1 stop20h 10m
Alaska Airlines
Mon 8/176:20 am
ORD
- SAN
Nonstop4h 34m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$286
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 8/226:00 am
SFO
- MDW
1 stop8h 20m
Southwest
Fri 8/2810:35 am
MDW
- SFO
2 stops9h 00m
Southwest
Deal found 6/8![Southwest logo]()
$315
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/111:45 pm
BUR
- ORD
1 stop7h 14m
United Airlines
Sat 7/256:00 am
ORD
- BUR
1 stop8h 48m
United Airlines
Deal found 6/11![United Airlines logo]()
$333
This Alaska Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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.
Wed 8/57:00 am
SAN
- ORD
Nonstop4h 21m
Alaska Airlines
Mon 8/107:20 am
ORD
- SAN
1 stop8h 07m
Alaska Airlines
Deal found 6/9![Alaska Airlines logo]()
$286
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:55 pm
SFO
- MDW
1 stop7h 45m
Southwest
Fri 8/212:50 pm
MDW
- SFO
2 stops7h 45m
Southwest
Deal found 6/9![Southwest logo]()
$315
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 8/224:10 pm
SFO
- ORD
Nonstop4h 20m
United Airlines
Tue 8/256:00 am
ORD
- SFO
Nonstop4h 38m
United Airlines
Deal found 6/9![United Airlines logo]()
$336
This Delta deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 8/811:35 am
LAX
- ORD
1 stop7h 55m
Delta
Sat 8/155:18 pm
ORD
- LAX
1 stop6h 57m
Delta
Deal found 6/10![Delta logo]()
$283
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 7/47:15 am
LAX
- MDW
1 stop7h 55m
Southwest
Sat 7/115:10 am
MDW
- LAX
1 stop7h 45m
Southwest
Deal found 6/8![Southwest logo]()
$315
This Alaska Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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.
Sun 7/267:00 am
SAN
- ORD
Nonstop4h 21m
Alaska Airlines
Tue 8/252:18 pm
ORD
- SAN
Nonstop4h 37m
Alaska Airlines
Deal found 6/10![Alaska Airlines logo]()
$292
This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 9/87:00 am
ONT
- ORD
Nonstop4h 10m
United Airlines
Wed 9/162:35 pm
ORD
- ONT
1 stop7h 26m
United Airlines
Deal found 6/9![United Airlines logo]()
$337
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 7/1012:30 am
LAX
- ORD
1 stop6h 05m
Delta
Wed 7/157:45 am
ORD
- LAX
1 stop6h 42m
Delta
Deal found 6/8![Delta logo]()
$287
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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.
Fri 7/34:55 pm
LAX
- MDW
1 stop5h 40m
Southwest
Sat 7/410:20 am
MDW
- LAX
2 stops6h 55m
Southwest
Deal found 6/8![Southwest logo]()
$320
This Alaska Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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.
Thu 8/66:19 pm
LAS
- ORD
1 stop17h 02m
Alaska Airlines
Thu 8/132:20 pm
ORD
- LAS
1 stop9h 23m
Alaska Airlines
Deal found 6/11![Alaska Airlines logo]()
$294
This United Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 9/84:10 pm
SNA
- ORD
1 stop5h 49m
United Airlines
Sat 9/125:00 am
ORD
- SNA
1 stop6h 17m
United Airlines
Deal found 6/8![United Airlines logo]()
$344
This Southwest deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 8/67:45 pm
SFO
- MDW
1 stop6h 45m
Southwest
Tue 8/113:10 pm
MDW
- SFO
2 stops8h 00m
Southwest
Deal found 6/8![Southwest logo]()
$322
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 8/156:20 am
LAS
- ORD
1 stop7h 10m
Delta
Thu 8/202:36 pm
ORD
- LAS
1 stop8h 32m
Delta
Deal found 6/8![Delta logo]()
$295
This Alaska Airlines deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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.
Tue 8/42:09 pm
BUR
- ORD
1 stop12h 51m
Alaska Airlines
Sat 8/87:20 am
ORD
- BUR
1 stop7h 53m
Alaska Airlines
Deal found 6/8![Alaska Airlines logo]()
$297
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2010:38 pm
SFO
- ORD
Nonstop4h 23m
United Airlines
Fri 7/249:35 pm
ORD
- SFO
Nonstop4h 57m
United Airlines
Deal found 6/12![United Airlines logo]()
$344
Last-minute flights from California to IllinoisDiscover last-minute flight deals from California to Illinois. Data last updated June 13, 2026 and is based on user searches.
Discover last-minute flight deals from California to Illinois. Data last updated June 13, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 6/1311:20 pm
LAS
- ORD
Nonstop3h 47m
Frontier
Tue 6/167:20 am
ORD
- LAS
Nonstop4h 16m
Frontier
Deal found 6/12![Frontier logo]()
$232
This Frontier deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/311:59 pm
LAX
- ORD
Nonstop4h 20m
Frontier
Sat 7/49:13 pm
ORD
- LAX
Nonstop4h 36m
Frontier
Deal found 6/10![Frontier logo]()
$228
This Super.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/311:59 pm
LAX
- ORD
Nonstop4h 20m
Frontier
Thu 7/99:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 6/12![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 7/411:59 pm
LAX
- ORD
Nonstop4h 20m
Frontier
Tue 7/149:57 pm
ORD
- LAX
1 stop28h 14m
Frontier
Deal found 6/13![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/711:49 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Tue 7/149:13 pm
ORD
- LAS
1 stop12h 38m
Frontier
Deal found 6/10![Frontier logo]()
$229
This Frontier deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/811:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Fri 7/179:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 6/10![Frontier logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/116:30 am
LAX
- ORD
1 stop12h 22m
Frontier
Tue 7/149:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 6/10![Frontier logo]()
$223
This Frontier deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/1511:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Tue 7/219:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 6/10![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/1811:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Thu 7/309:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 6/12![Frontier logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/2611:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Sat 8/159:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 6/11![Frontier logo]()
$231
This United Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/286:58 pm
LAX
- ORD
Nonstop4h 17m
United Airlines
Mon 8/109:30 pm
ORD
- LAX
Nonstop4h 39m
United Airlines
Deal found 6/10![United Airlines logo]()
$234
This Travelocity deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2911:49 pm
LAS
- ORD
Nonstop3h 48m
Multiple Airlines
Tue 8/46:20 am
ORD
- LAS
1 stop9h 38m
Multiple Airlines
Deal found 6/10![Multiple Airlines logo]()
$234
One-way flights from California to IllinoisSearch for one-way flight options from California to Illinois. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
Search for one-way flight options from California to Illinois. Find affordable one-way fares based on user searches. Data last updated June 13, 2026.
This Trip.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:00 am
ONT
- ORD
1 stop12h 52m
Frontier
Deal found 6/12![Frontier logo]()
$108
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/87:00 am
LAS
- ORD
1 stop15h 49m
Frontier
Deal found 6/12![Frontier logo]()
$110
This Jettzy deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/711:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Deal found 6/9![Frontier logo]()
$111
This Cheapflightsfares deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Fri 7/311:20 pm
LAS
- ORD
Nonstop3h 47m
Frontier
Deal found 6/12![Frontier logo]()
$112
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/181:16 pm
LAS
- ORD
Nonstop4h 14m
American Airlines
Deal found 6/10![American Airlines logo]()
$113
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/199:34 am
LAS
- ORD
Nonstop4h 03m
American Airlines
Deal found 6/11![American Airlines logo]()
$114
This Trip.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:00 am
ONT
- ORD
1 stop12h 52m
Frontier
Deal found 6/12![Frontier logo]()
$114
This Super.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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 7/811:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Deal found 6/10![Frontier logo]()
$114
This Cheapflightsfares deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 6/1611:20 pm
LAS
- ORD
Nonstop3h 47m
Frontier
Deal found 6/12![Frontier logo]()
$115
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” 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 8/135:15 pm
LAX
- MDW
Nonstop3h 50m
Southwest
Deal found 6/9![Southwest logo]()
$115
This Delta deal was found by Cheapflights users on 6/8. Clicking the “Pick Dates” 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 8/225:46 pm
LAX
- ORD
Nonstop4h 02m
Delta
Deal found 6/8![Delta logo]()
$115
This Cheapflightsfares deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” 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.
Fri 8/711:49 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Deal found 6/10![Frontier logo]()
$116
Find flight deals from California to Illinois
Keep the following information in mind while searching for California to Illinois flight deals. Data was last updated June 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $223 (Delta) |
One-way from | $108 (Trip.com) |
Popular in | June |
Cheapest in | September |
Average price | $409 |
Good round-trip deal | $348 or less |
Good one-way deal | $178 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from California 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 13, 2026.
Use the filters below to find and compare flights from California to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Tue 7/28
7:15 am-6:29 pm
1 stop9h 14m
Chicago O'Hare Intl
Wed 8/12
8:28 am-3:04 pm
1 stop8h 36m
$238
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Wed 7/15
5:15 pm-11:18 pm
Nonstop4h 03m
Chicago O'Hare Intl
Wed 7/22
6:35 pm-9:12 pm
Nonstop4h 37m
$239
Los AngelesChicago
LAX - MDW
LAXMDW
Los Angeles
Sat 8/29
12:12 pm-10:36 pm
1 stop8h 24m
Chicago Midway
Mon 8/31
6:05 am-2:02 pm
1 stop9h 57m
$249
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Sat 9/5
11:08 am-8:55 pm
1 stop7h 47m
Chicago O'Hare Intl
Sat 9/12
5:00 pm-9:55 pm
1 stop6h 55m
$249
Los AngelesChicago
LAX - MDW
LAXMDW
Los Angeles
Tue 8/4
1:25 pm-9:05 pm
1 stop5h 40m
Chicago Midway
Tue 8/11
8:45 pm-11:05 pm
Nonstop4h 20m
$252
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Fri 8/28
9:40 am-6:29 pm
1 stop6h 49m
Chicago O'Hare Intl
Wed 9/2
6:00 am-1:15 pm
1 stop9h 15m
$253
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Wed 7/22
6:50 am-6:57 pm
1 stop10h 07m
Chicago O'Hare Intl
Tue 8/11
6:20 am-1:58 pm
1 stop9h 38m
$259
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Wed 8/12
7:59 am-6:57 pm
1 stop8h 58m
Chicago O'Hare Intl
Mon 8/17
8:20 pm-10:29 am
1 stop16h 09m
$270
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Sat 8/8
11:35 am-9:30 pm
1 stop7h 55m
Chicago O'Hare Intl
Sat 8/15
5:18 pm-10:15 pm
1 stop6h 57m
$283
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Mon 8/17
11:55 pm-5:25 am
Nonstop3h 30m
Chicago O'Hare Intl
Sat 8/22
3:56 pm-8:51 pm
1 stop6h 55m
$285
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from California to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from California with our price prediction graph.
LAX-MDW
LAX-ORD
LAS-ORD
BUR-ORD
SAN-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 California to Illinois
USCA-USIL
LAX-MDW
LAX-ORD
LAS-ORD
BUR-ORD
What is the cheapest month to book a flight from California to Illinois?
Currently, September is the cheapest month in which you can book a flight from California to Illinois (average of $299). Flying from California to Illinois in June is currently the most expensive (average of $445). 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 CA to IL?
Find hourly flight availability from California 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 13, 2026.
It’s typically best to fly out from California to Illinois in the afternoon. Doing so could potentially save you 18% on the flight price compared to flying at noon, which is usually more expensive.
Weekly flight availability from California to Illinois
Explore weekly flight availability from California 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 13, 2026.
The most flights from USCA to USIL are scheduled on a Friday (132 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (108 on average).
How much does it cost to fly round-trip from California to Illinois?
How far ahead should I book a flight from California to Illinois?
The price you pay for your flight from California to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 34 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from California to Illinois?
Use this chart to determine the cheapest time to fly round-trip from California to Illinois. Price data was last updated on June 8, 2026.
Travelers seeking maximum savings on their California to Illinois flight should consider departing on Wednesday mornings when fares are most often at their lowest. Sunday 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 13, 2026.
See what other customers who have flown with Alaska Airlines,Southwest, andUnited Airlines from California to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Boarding
8.1
Food
7.0
Crew
8.5
Comfort
7.8
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Related info for your journey
Find useful and relevant information for your journey from California 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 California 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 California to Illinois by cabin class
Find flights from California to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
California and Illinois flights
Browse other California and Illinois flight options. Last updated on June 13, 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 California after your stay in Illinois
California to Illinois flights
Consider these flights traveling from California to Illinois.
Top 8 airlines flying from California to Illinois
Discover the top 8 airlines that operate flights from California 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 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$51 | Average$282 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$210 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$122 | Average$368 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$154 | Average$397 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$157 | Average$488 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$164 | Average$471 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$166 | Average$336 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$179 | Average$429 | FlexibilityNo cancel fee | On-time63% |