$102+ Cheap flights from California to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ORD
Oct 10 — Oct 171
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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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 California to Illinois
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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 September 10, 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 September 10, 2026.
This Frontier deal was found by Cheapflights users on 9/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/310:04 pm -
1 stop9h 16m
Sun 10/48:55 pm -
Nonstop4h 10m
Deal found 9/8![Frontier logo]()
$175
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:29 pm -
Nonstop3h 47m
Sun 10/183:30 pm -
Nonstop4h 16m
Deal found 9/9![Frontier logo]()
$176
This deal was found by Cheapflights users on 9/8. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1811:29 pm -
Nonstop3h 47m
Sun 10/256:30 am -
1 stop6h 21m
Deal found 9/8![Frontier logo]()
$177
This Frontier deal was found by Cheapflights users on 9/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1311:29 pm -
Nonstop3h 44m
Sun 11/155:15 pm -
Nonstop4h 21m
Deal found 9/8![Frontier logo]()
$178
This Expedia deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/211:50 pm -
Nonstop3h 48m
Tue 10/61:21 pm -
Nonstop4h 09m
Deal found 9/6![Frontier logo]()
$180
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:50 pm -
Nonstop3h 48m
Mon 10/58:55 pm -
Nonstop4h 10m
Deal found 9/8![Frontier logo]()
$181
This Frontier deal was found by Cheapflights users on 9/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1311:29 pm -
Nonstop3h 44m
Thu 11/1910:26 am -
1 stop14h 42m
Deal found 9/8![Frontier logo]()
$183
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3011:50 pm -
Nonstop3h 48m
Wed 10/71:21 pm -
Nonstop4h 09m
Deal found 9/9![Frontier logo]()
$186
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:30 am -
1 stop22h 04m
Tue 10/208:01 pm -
1 stop24h 32m
Deal found 9/9![Frontier logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/301:24 pm -
1 stop14h 14m
Fri 10/28:55 pm -
1 stop17h 39m
Deal found 9/9![Frontier logo]()
$194
This Expedia deal was found by Cheapflights users on 9/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:21 am -
Nonstop4h 13m
Mon 10/123:30 pm -
1 stop26h 50m
Deal found 9/9![Frontier logo]()
$197
This Expedia deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:21 am -
Nonstop4h 13m
Wed 10/143:49 pm -
1 stop8h 05m
Deal found 9/6![Multiple Airlines logo]()
$198
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 September 10, 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 September 10, 2026.
This Southwest deal was found by Cheapflights users on 9/9. 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 11/911:55 pm -
Nonstop4h 00m
Fri 11/139:30 pm -
Nonstop4h 25m
Deal found 9/9![Southwest logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:59 pm -
1 stop10h 41m
Wed 10/289:00 am -
1 stop10h 03m
Deal found 9/5![Alaska Airlines logo]()
$237
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sun 10/411:35 pm -
Nonstop4h 10m
Fri 10/93:00 pm -
Nonstop4h 37m
Deal found 9/9![United Airlines logo]()
$237
This Delta deal was found by Cheapflights users on 9/8. 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.
Thu 10/2912:00 pm -
1 stop9h 34m
Mon 11/25:30 pm -
1 stop8h 51m
Deal found 9/8![Delta logo]()
$237
This Sun Country Air deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/265:46 pm -
1 stop14h 15m
Sun 11/297:35 pm -
1 stop14h 29m
Deal found 9/6![Sun Country Air logo]()
$345
This Southwest deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 11/1211:55 pm -
Nonstop4h 00m
Sun 11/157:25 am -
Nonstop4h 30m
Deal found 9/7![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/147:05 am -
1 stop7h 48m
Mon 10/195:27 am -
1 stop7h 33m
Deal found 9/6![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/54:30 pm -
1 stop6h 30m
Wed 10/76:30 am -
Nonstop4h 30m
Deal found 9/5![Southwest logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 10/247:00 am -
Nonstop4h 25m
Sat 10/317:20 am -
Nonstop4h 36m
Deal found 9/9![Alaska Airlines logo]()
$257
This United Airlines deal was found by Cheapflights users on 9/9. 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 10/311:05 pm -
Nonstop4h 10m
Tue 10/66:06 pm -
Nonstop4h 33m
Deal found 9/9![United Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/103:00 pm -
Nonstop4h 02m
Fri 10/165:30 pm -
1 stop8h 51m
Deal found 9/5![Delta logo]()
$247
This Southwest deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/2810:55 am -
1 stop6h 35m
Sun 11/19:30 pm -
Nonstop4h 25m
Deal found 9/6![Southwest logo]()
$227
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sun 10/411:05 pm -
Nonstop4h 10m
Tue 10/63:00 pm -
Nonstop4h 37m
Deal found 9/9![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/105:45 am -
Nonstop3h 50m
Fri 10/168:00 pm -
1 stop6h 15m
Deal found 9/6![Southwest logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 10/37:00 am -
Nonstop4h 25m
Thu 10/157:20 am -
Nonstop4h 36m
Deal found 9/9![Alaska Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 9/3011:05 pm -
Nonstop4h 10m
Fri 10/28:50 am -
Nonstop4h 33m
Deal found 9/9![United Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:25 pm -
Nonstop4h 06m
Mon 10/55:10 pm -
1 stop7h 00m
Deal found 9/5![Delta logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 10/15:45 pm -
Nonstop4h 14m
Sat 10/319:00 am -
1 stop28h 13m
Deal found 9/7![Alaska Airlines logo]()
$280
This United Airlines deal was found by Cheapflights users on 9/8. 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.
Sun 11/227:00 am -
Nonstop3h 58m
Thu 11/261:30 pm -
Nonstop4h 29m
Deal found 9/8![United Airlines logo]()
$268
This Delta deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/111:59 pm -
1 stop6h 31m
Sun 10/46:10 am -
1 stop7h 03m
Deal found 9/6![Delta logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 11/215:32 pm -
Nonstop4h 17m
Thu 11/267:26 am -
Nonstop4h 41m
Deal found 9/6![Alaska Airlines logo]()
$280
This Southwest deal was found by Cheapflights users on 9/9. 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.
Wed 10/1411:55 pm -
Nonstop3h 55m
Thu 10/156:00 pm -
1 stop7h 00m
Deal found 9/9![Southwest logo]()
$267
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Wed 11/1811:32 am -
1 stop10h 27m
Mon 11/237:57 pm -
Nonstop4h 55m
Deal found 9/8![Alaska Airlines logo]()
$280
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1311:02 am -
1 stop10h 32m
Mon 10/196:35 am -
1 stop8h 23m
Deal found 9/5![Delta logo]()
$283
This Alaska Airlines deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 9/307:03 am -
Nonstop4h 19m
Tue 10/67:00 am -
1 stop12h 52m
Deal found 9/6![Alaska Airlines logo]()
$280
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3111:02 am -
1 stop10h 52m
Sun 11/86:35 am -
1 stop8h 23m
Deal found 9/5![Delta logo]()
$283
This Southwest deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:10 am -
Nonstop3h 55m
Sat 9/268:45 pm -
Nonstop4h 25m
Deal found 9/5![Southwest logo]()
$287
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 11/46:00 am -
Nonstop3h 46m
Sun 12/69:20 am -
Nonstop4h 18m
Deal found 9/9![United Airlines logo]()
$326
This Alaska Airlines deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 9/285:45 pm -
Nonstop4h 14m
Mon 10/57:16 pm -
1 stop16h 50m
Deal found 9/7![Alaska Airlines logo]()
$280
This Delta deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 10/2911:02 am -
1 stop10h 32m
Sun 11/16:35 am -
1 stop8h 23m
Deal found 9/7![Delta logo]()
$283
Last-minute flights from California to IllinoisDiscover last-minute flight deals from California to Illinois. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from California to Illinois. Data last updated September 10, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2811:50 pm -
Nonstop3h 48m
Sun 10/48:55 pm -
Nonstop4h 10m
Deal found 9/6![Frontier logo]()
$178
This Cheapflightsfares deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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.
Wed 9/3011:50 pm -
Nonstop3h 48m
Wed 10/71:21 pm -
Nonstop4h 09m
Deal found 9/7![Frontier logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/301:24 pm -
1 stop14h 14m
Fri 10/28:55 pm -
1 stop17h 39m
Deal found 9/9![Frontier logo]()
$194
This Expedia deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/211:50 pm -
Nonstop3h 48m
Tue 10/61:21 pm -
Nonstop4h 09m
Deal found 9/6![Frontier logo]()
$180
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:50 pm -
Nonstop3h 48m
Mon 10/58:55 pm -
Nonstop4h 10m
Deal found 9/8![Frontier logo]()
$181
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 10/211:50 pm -
Nonstop3h 48m
Tue 10/138:01 pm -
1 stop16h 35m
Deal found 9/10![Frontier logo]()
$188
This Frontier deal was found by Cheapflights users on 9/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/310:04 pm -
1 stop9h 16m
Sun 10/48:55 pm -
Nonstop4h 10m
Deal found 9/8![Frontier logo]()
$175
This Expedia deal was found by Cheapflights users on 9/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:21 am -
Nonstop4h 13m
Mon 10/123:30 pm -
1 stop26h 50m
Deal found 9/9![Frontier logo]()
$197
This Expedia deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:21 am -
Nonstop4h 13m
Wed 10/143:49 pm -
1 stop8h 05m
Deal found 9/6![Multiple Airlines logo]()
$198
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:30 am -
1 stop22h 04m
Tue 10/208:01 pm -
1 stop24h 32m
Deal found 9/9![Frontier logo]()
$189
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:29 pm -
Nonstop3h 47m
Sun 10/183:30 pm -
Nonstop4h 16m
Deal found 9/9![Frontier logo]()
$176
This deal was found by Cheapflights users on 9/8. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1811:29 pm -
Nonstop3h 47m
Sun 10/256:30 am -
1 stop6h 21m
Deal found 9/8![Frontier logo]()
$177
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 September 10, 2026.
Search for one-way flight options from California to Illinois. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Trip.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” 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 10/812:21 am -
Nonstop4h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Frontier logo]()
$102
This Super.com deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1011:52 am -
1 stop10h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$103
This Mytrip deal was found by Cheapflights users on 9/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/56:05 am -
1 stop16h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Frontier logo]()
$103
This Expedia deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:25 am -
1 stop15h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$104
This Mytrip deal was found by Cheapflights users on 9/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/36:05 am -
1 stop16h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$104
This Super.com deal was found by Cheapflights users on 9/10. 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.
Thu 10/12:28 pm -
1 stop7h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Frontier logo]()
$106
This Kiwi.com deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:21 am -
Nonstop4h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$107
This Super.com deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2412:21 am -
Nonstop4h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$108
This Cheapflightsfares deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/611:50 pm -
Nonstop3h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![Frontier logo]()
$109
This Southwest deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” 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 10/195:25 am -
Nonstop3h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Southwest logo]()
$109
This JetBlue deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1310:00 am -
1 stop11h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![JetBlue logo]()
$109
This American Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:22 pm -
Nonstop4h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![American Airlines logo]()
$110
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 September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $175 (Frontier) |
One-way from | $102 (Trip.com) |
Popular in | June |
Cheapest in | September |
Average price | $294 |
Good round-trip deal | $286 or less |
Good one-way deal | $167 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 7,457,451 searches. Data last updated September 10, 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 Los Angeles - MDW Chicago Midway
LAXMDW
Los Angeles
Sat 10/31
6:05 am-11:55 am
Nonstop3h 50m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$109
Los AngelesChicago
LAX Los Angeles - MDW Chicago Midway
LAXMDW
Los Angeles
Sat 10/10
9:45 am-6:00 pm
1 stop6h 15m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$119
Los AngelesChicago
LAX Los Angeles - ORD Chicago O'Hare Intl
LAXORD
Los Angeles
Sat 10/24
6:02 pm-5:40 am
1 stop9h 38m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$119
Los AngelesChicago
LAX Los Angeles - MDW Chicago Midway
LAXMDW
Los Angeles
Wed 10/14
8:00 am-4:00 pm
1 stop6h 00m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$119
Los AngelesChicago
LAX Los Angeles - ORD Chicago O'Hare Intl
LAXORD
Los Angeles
Wed 11/18
1:15 pm-9:33 pm
1 stop6h 18m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$119
Los AngelesChicago
LAX Los Angeles - ORD Chicago O'Hare Intl
LAXORD
Los Angeles
Mon 11/9
11:00 am-11:59 pm
1 stop10h 59m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$119
Los AngelesChicago
LAX Los Angeles - MDW Chicago Midway
LAXMDW
Los Angeles
Thu 10/22
4:30 pm-1:00 am
1 stop6h 30m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$119
Los AngelesChicago
LAX Los Angeles - ORD Chicago O'Hare Intl
LAXORD
Los Angeles
Sun 10/18
10:05 pm-7:41 am
1 stop7h 36m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$119
Los AngelesChicago
LAX Los Angeles - MDW Chicago Midway
LAXMDW
Los Angeles
Fri 10/16
8:55 pm-5:50 am
1 stop6h 55m
Chicago Midway
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$119
Los AngelesChicago
LAX Los Angeles - ORD Chicago O'Hare Intl
LAXORD
Los Angeles
Mon 11/16
6:00 am-4:41 pm
1 stop8h 41m
Chicago O'Hare Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$119
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
SAN-ORD
LAS-ORD
BUR-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
SAN-ORD
LAS-ORD
What is the cheapest month to book a flight from California to Illinois?
Currently, October is the cheapest month in which you can book a flight from California to Illinois (average of $358). 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 September 10, 2026.
It’s typically best to fly out from California to Illinois in the evening. 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 September 10, 2026.
The most flights from USCA to USIL are scheduled on a Tuesday (137 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (42 on average).
How much does it cost to fly round-trip from California to Illinois?
Airfare is below average for this route at the moment.
California to Illinois flights typically cost between $243 and $414 in October.The cheapest round-trip price found within the last 5 days was $197 on Frontier (Oct 10-Oct 12).
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 September 5, 2026.
Travelers seeking maximum savings on their California to Illinois flight should consider departing on Friday 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 September 10, 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.
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Overall
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
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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 September 10, 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 7 airlines flying from California to Illinois
Discover the top 7 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 7,457,451 searches. Data last updated September 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$99 | Average$311 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$122 | Average$363 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$159 | Average$422 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$166 | Average$348 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$167 | Average$512 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$182 | Average$462 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$222 | Average$452 | FlexibilityNo cancel fee | On-time63% |