$97+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ORD
Aug 26 — Sep 21
Round-trip
1 adult, Economy
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Find cheap flights from California 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
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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 July 27, 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 July 27, 2026.
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:15 pm
LAS
- ORD
Nonstop4h 06m
Frontier
Tue 9/151:21 pm
ORD
- LAS
Nonstop4h 09m
Frontier
Deal found 7/25![Frontier logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/239:15 pm
LAS
- ORD
1 stop10h 46m
Frontier
Wed 9/302:46 pm
ORD
- LAS
1 stop10h 34m
Frontier
Deal found 7/23![Frontier logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/1911:34 am
LAS
- ORD
1 stop9h 34m
Frontier
Wed 8/268:45 am
ORD
- LAS
1 stop14h 27m
Frontier
Deal found 7/22![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:11 am
LAS
- ORD
1 stop19h 48m
Frontier
Wed 9/96:50 am
ORD
- LAS
Nonstop4h 08m
Frontier
Deal found 7/22![Frontier logo]()
$198
This Booking.com deal was found by Cheapflights users on 7/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1111:50 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Mon 9/148:55 pm
ORD
- LAS
Nonstop4h 10m
Frontier
Deal found 7/26![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” 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 9/1511:55 pm
LAS
- ORD
Nonstop3h 47m
Frontier
Sat 9/1911:06 am
ORD
- LAS
1 stop11h 04m
Frontier
Deal found 7/23![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:55 pm
LAS
- ORD
Nonstop3h 47m
Frontier
Mon 9/2110:40 pm
ORD
- LAS
1 stop12h 50m
Frontier
Deal found 7/22![Frontier logo]()
$201
This Cheapflightsfares deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” 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 9/186:05 am
LAS
- ORD
Nonstop3h 52m
Frontier
Sat 9/196:50 am
ORD
- LAS
Nonstop4h 08m
Frontier
Deal found 7/21![Frontier logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:10 pm
LAS
- ORD
1 stop7h 13m
Frontier
Mon 9/288:55 pm
ORD
- LAS
Nonstop4h 10m
Frontier
Deal found 7/26![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/201:40 pm
LAS
- ORD
1 stop9h 09m
Frontier
Thu 8/272:41 pm
ORD
- LAS
1 stop11h 06m
Frontier
Deal found 7/23![Frontier logo]()
$204
This Cheapflightsfares deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 9/412:56 pm
LAS
- ORD
Nonstop4h 06m
Frontier
Sun 9/68:11 pm
ORD
- LAS
Nonstop4h 12m
Frontier
Deal found 7/22![Frontier logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2812:56 pm
LAS
- ORD
Nonstop4h 06m
Frontier
Sat 8/298:45 am
ORD
- LAS
1 stop14h 27m
Frontier
Deal found 7/22![Frontier logo]()
$206
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 July 27, 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 July 27, 2026.
This Southwest deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” 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 10/1511:55 pm
LAX
- MDW
Nonstop3h 55m
Southwest
Sun 10/1810:30 pm
MDW
- LAX
Nonstop4h 30m
Southwest
Deal found 7/23![Southwest logo]()
$247
This United Airlines deal was found by Cheapflights users on 7/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:35 pm
LAX
- ORD
Nonstop4h 10m
United Airlines
Sun 10/257:00 am
ORD
- LAX
Nonstop4h 35m
United Airlines
Deal found 7/26![United Airlines logo]()
$247
This Delta deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” 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 9/95:15 pm
LAX
- ORD
Nonstop4h 06m
Delta
Tue 9/152:05 pm
ORD
- LAX
1 stop6h 07m
Delta
Deal found 7/23![Delta logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 9/108:45 am
LAS
- ORD
1 stop8h 36m
Alaska Airlines
Sun 9/137:20 am
ORD
- LAS
1 stop6h 44m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$263
This KAYAK deal was found by Cheapflights users on 7/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/23:21 pm
SNA
- ORD
Nonstop4h 37m
American Airlines
Sun 9/612:11 pm
ORD
- SNA
1 stop7h 18m
American Airlines
Deal found 7/26![American Airlines logo]()
$424
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 9/811:55 pm
LAX
- MDW
Nonstop4h 00m
Southwest
Wed 9/161:55 pm
MDW
- LAX
1 stop7h 20m
Southwest
Deal found 7/24![Southwest logo]()
$257
This Delta deal was found by Cheapflights users on 7/26. 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 9/911:15 am
LAX
- ORD
Nonstop4h 08m
Delta
Mon 9/147:40 pm
ORD
- LAX
1 stop6h 15m
Delta
Deal found 7/26![Delta logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 7/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:00 am
LAS
- ORD
1 stop10h 21m
Alaska Airlines
Wed 8/266:01 am
ORD
- LAS
1 stop8h 03m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$265
This Southwest deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” 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 9/2211:55 pm
LAX
- MDW
Nonstop4h 00m
Southwest
Sat 9/261:15 pm
MDW
- LAX
1 stop7h 30m
Southwest
Deal found 7/25![Southwest logo]()
$257
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” 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 10/136:00 am
LAS
- ORD
Nonstop3h 48m
United Airlines
Tue 10/133:50 pm
ORD
- LAS
1 stop6h 28m
United Airlines
Deal found 7/23![United Airlines logo]()
$285
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” 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.
Mon 8/177:21 pm
LAS
- ORD
1 stop16h 00m
Alaska Airlines
Sat 8/222:18 pm
ORD
- LAS
1 stop21h 24m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$265
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 10/2911:59 pm
LAX
- MDW
1 stop6h 48m
Delta
Mon 11/29:59 am
MDW
- LAX
1 stop8h 52m
Delta
Deal found 7/22![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:30 am
LAX
- MDW
1 stop7h 30m
Southwest
Tue 9/88:45 pm
MDW
- LAX
Nonstop4h 25m
Southwest
Deal found 7/23![Southwest logo]()
$257
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” 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 9/144:55 pm
SAN
- ORD
Nonstop4h 04m
United Airlines
Fri 9/181:30 pm
ORD
- SAN
Nonstop4h 19m
United Airlines
Deal found 7/25![United Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 9/1812:09 pm
LAX
- ORD
1 stop9h 48m
Delta
Thu 9/242:50 pm
ORD
- LAX
Nonstop4h 25m
Delta
Deal found 7/24![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 11/146:20 am
LAX
- MDW
1 stop7h 10m
Southwest
Sun 11/159:30 pm
MDW
- LAX
Nonstop4h 25m
Southwest
Deal found 7/24![Southwest logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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.
Mon 8/318:33 pm
SAN
- ORD
1 stop13h 34m
Alaska Airlines
Thu 9/32:18 pm
ORD
- SAN
Nonstop4h 37m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$284
This United Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 9/23:20 pm
LAX
- ORD
Nonstop4h 10m
United Airlines
Mon 9/75:55 am
ORD
- LAX
Nonstop4h 27m
United Airlines
Deal found 7/22![United Airlines logo]()
$288
This Delta deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 9/512:37 pm
LAX
- ORD
1 stop7h 10m
Delta
Sun 9/66:00 am
ORD
- LAX
1 stop7h 12m
Delta
Deal found 7/22![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 9/255:45 pm
SAN
- ORD
Nonstop4h 14m
Alaska Airlines
Sat 9/262:18 pm
ORD
- SAN
Nonstop4h 37m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$287
This Southwest deal was found by Cheapflights users on 7/26. 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.
Tue 9/110:40 am
LAX
- MDW
Nonstop3h 55m
Southwest
Sat 9/58:45 pm
MDW
- LAX
Nonstop4h 25m
Southwest
Deal found 7/26![Southwest logo]()
$262
This United Airlines deal was found by Cheapflights users on 7/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2211:55 pm
LAS
- ORD
Nonstop3h 30m
United Airlines
Sat 8/295:00 am
ORD
- LAS
1 stop6h 09m
United Airlines
Deal found 7/26![United Airlines logo]()
$293
This Delta deal was found by Cheapflights users on 7/26. 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 9/912:09 pm
LAX
- ORD
1 stop9h 48m
Delta
Wed 9/1611:17 am
ORD
- LAX
1 stop8h 16m
Delta
Deal found 7/26![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 9/32:51 pm
LAS
- ORD
1 stop7h 08m
Alaska Airlines
Sun 9/62:18 pm
ORD
- LAS
1 stop10h 17m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$291
This Southwest deal was found by Cheapflights users on 7/26. 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.
Thu 10/15:10 am
LAX
- MDW
1 stop7h 00m
Southwest
Thu 10/18:00 pm
MDW
- LAX
1 stop6h 10m
Southwest
Deal found 7/26![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:25 pm
LAX
- ORD
Nonstop4h 06m
Delta
Sat 9/2612:29 pm
ORD
- LAX
1 stop9h 37m
Delta
Deal found 7/25![Delta logo]()
$267
This United Airlines deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:38 pm
SFO
- ORD
Nonstop4h 21m
United Airlines
Mon 8/1710:00 pm
ORD
- SFO
Nonstop4h 50m
United Airlines
Deal found 7/23![United Airlines logo]()
$300
This Southwest deal was found by Cheapflights users on 7/26. 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.
Wed 9/99:05 am
LAX
- MDW
1 stop6h 20m
Southwest
Wed 9/163:15 pm
MDW
- LAX
1 stop6h 05m
Southwest
Deal found 7/26![Southwest logo]()
$267
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 9/1110:45 pm
LAX
- ORD
1 stop7h 12m
Delta
Sun 9/137:07 am
ORD
- LAX
Nonstop4h 28m
Delta
Deal found 7/24![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” 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 9/27:03 am
SAN
- ORD
Nonstop4h 19m
Alaska Airlines
Sat 9/56:00 am
ORD
- SAN
1 stop9h 19m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$297
Last-minute flights from California to IllinoisDiscover last-minute flight deals from California to Illinois. Data last updated July 27, 2026 and is based on user searches.
Discover last-minute flight deals from California to Illinois. Data last updated July 27, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1011:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Tue 8/188:45 am
ORD
- LAX
2 stops15h 54m
Frontier
Deal found 7/22![Frontier logo]()
$230
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1011:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Thu 8/209:20 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 7/22![Frontier logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/1212:07 pm
LAX
- ORD
1 stop15h 30m
Frontier
Thu 8/139:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 7/22![Frontier logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:30 am
LAX
- ORD
1 stop12h 22m
Frontier
Sat 8/159:13 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 7/23![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:30 am
LAX
- ORD
1 stop12h 22m
Frontier
Thu 8/202:41 pm
ORD
- LAX
1 stop11h 30m
Frontier
Deal found 7/22![Frontier logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/1511:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Sat 8/222:41 pm
ORD
- LAX
1 stop11h 30m
Frontier
Deal found 7/22![Frontier logo]()
$229
This Super.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1511:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Tue 8/189:20 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 7/25![Frontier logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:49 pm
LAX
- ORD
2 stops17h 10m
Frontier
Thu 8/202:41 pm
ORD
- LAX
1 stop11h 30m
Frontier
Deal found 7/23![Frontier logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:41 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Thu 9/106:30 am
ORD
- LAX
1 stop19h 40m
Frontier
Deal found 7/26![Frontier logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:55 am
LAX
- ORD
1 stop10h 07m
Frontier
Sat 8/229:20 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 7/26![Frontier logo]()
$234
This Frontier deal was found by Cheapflights users on 7/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:49 am
LAX
- MDW
1 stop8h 42m
Frontier
Sat 9/126:25 am
MDW
- LAX
1 stop13h 17m
Frontier
Deal found 7/26![Frontier logo]()
$240
This Frontier deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 8/2811:59 pm
LAX
- ORD
Nonstop4h 18m
Frontier
Tue 9/19:20 pm
ORD
- LAX
Nonstop4h 44m
Frontier
Deal found 7/22![Frontier logo]()
$235
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 July 27, 2026.
Search for one-way flight options from California to Illinois. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
This Trip.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” 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 9/166:00 am
ONT
- ORD
1 stop13h 35m
Frontier
Deal found 7/22![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:00 am
ONT
- ORD
1 stop13h 35m
Frontier
Deal found 7/21![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 7/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2410:49 am
ONT
- ORD
1 stop24h 47m
Frontier
Deal found 7/22![Frontier logo]()
$100
This Trip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1510:49 am
ONT
- ORD
1 stop8h 03m
Frontier
Deal found 7/24![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” 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 9/226:15 am
ONT
- ORD
1 stop16h 08m
Frontier
Deal found 7/25![Frontier logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 7/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/213:47 pm
ONT
- ORD
1 stop27h 47m
Frontier
Deal found 7/21![Frontier logo]()
$104
This Trip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 10/76:15 am
ONT
- ORD
1 stop16h 08m
Frontier
Deal found 7/24![Frontier logo]()
$112
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1311:50 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Deal found 7/26![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” 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 8/1810:59 am
ONT
- ORD
1 stop27h 00m
Frontier
Deal found 7/24![Frontier logo]()
$115
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:05 am
LAS
- ORD
Nonstop3h 52m
Frontier
Deal found 7/25![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” 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 10/39:40 am
LAS
- ORD
1 stop12h 43m
Frontier
Deal found 7/25![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/219:41 pm
LAS
- ORD
1 stop23h 27m
Frontier
Deal found 7/23![Frontier logo]()
$118
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 July 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $195 (Frontier) |
One-way from | $97 (Trip.com) |
Popular in | June |
Cheapest in | September |
Average price | $412 |
Good round-trip deal | $318 or less |
Good one-way deal | $186 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 July 27, 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 - MDW
LAXMDW
Los Angeles
Thu 10/15
11:55 pm-5:50 am
Nonstop3h 55m
Chicago Midway
Sun 10/18
10:30 pm-1:00 am
Nonstop4h 30m
$247
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Wed 10/21
10:35 pm-4:45 am
Nonstop4h 10m
Chicago O'Hare Intl
Sun 10/25
7:00 am-9:35 am
Nonstop4h 35m
$247
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Wed 9/9
5:15 pm-11:21 pm
Nonstop4h 06m
Chicago O'Hare Intl
Tue 9/15
2:05 pm-6:12 pm
1 stop6h 07m
$257
Los AngelesChicago
LAX - MDW
LAXMDW
Los Angeles
Tue 9/8
11:55 pm-5:55 am
Nonstop4h 00m
Chicago Midway
Wed 9/16
1:55 pm-7:15 pm
1 stop7h 20m
$257
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Wed 9/9
11:15 am-5:23 pm
Nonstop4h 08m
Chicago O'Hare Intl
Mon 9/14
7:40 pm-11:55 pm
1 stop6h 15m
$257
Los AngelesChicago
LAX - MDW
LAXMDW
Los Angeles
Tue 9/22
11:55 pm-5:55 am
Nonstop4h 00m
Chicago Midway
Sat 9/26
1:15 pm-6:45 pm
1 stop7h 30m
$257
Los AngelesChicago
LAX - MDW
LAXMDW
Los Angeles
Sat 9/5
6:30 am-4:00 pm
1 stop7h 30m
Chicago Midway
Tue 9/8
8:45 pm-11:10 pm
Nonstop4h 25m
$257
Los AngelesChicago
LAX - MDW
LAXMDW
Los Angeles
Sat 11/14
6:20 am-3:30 pm
1 stop7h 10m
Chicago Midway
Sun 11/15
9:30 pm-11:55 pm
Nonstop4h 25m
$257
Quickest round-trip
Los AngelesChicago
LAX - MDW
LAXMDW
Los Angeles
Tue 9/1
10:40 am-4:35 pm
Nonstop3h 55m
Chicago Midway
Sat 9/5
8:45 pm-11:10 pm
Nonstop4h 25m
$262
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Thu 9/10
8:45 am-7:21 pm
1 stop8h 36m
Chicago O'Hare Intl
Sun 9/13
7:20 am-12:04 pm
1 stop6h 44m
$263
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-ORD
LAX-MDW
LAS-ORD
ONT-ORD
SNA-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-ORD
LAX-MDW
LAS-ORD
ONT-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 $325). Flying from California to Illinois in June is currently the most expensive (average of $456). 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 July 27, 2026.
It’s typically best to fly out from California to Illinois in the morning. Doing so could potentially save you 12% on the flight price compared to flying in the afternoon, 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 July 27, 2026.
The most flights from USCA to USIL are scheduled on a Friday (138 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (120 on average).
How much does it cost to fly round-trip from California to Illinois?
Airfare is typical for this route at the moment.
California to Illinois flights typically cost between $205 and $398 in August.The cheapest round-trip price found within the last 5 days was $229 on Frontier (Aug 15-Aug 22).
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 41 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 July 25, 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 mornings 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 July 27, 2026.
See what other customers who have flown with Southwest,Alaska Airlines, 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
Overall
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Overall
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Overall
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Overall
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Overall
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Boarding
8.1
Overall
8.0
Crew
8.6
Food
7.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
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.
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.
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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 July 27, 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 July 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$294 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$122 | Average$391 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$139 | Average$197 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$156 | Average$410 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$157 | Average$506 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$163 | Average$469 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$166 | Average$328 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$205 | Average$459 | FlexibilityNo cancel fee | On-time63% |