$67+ 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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ORD
May 29 — Jun 51
Round-trip
1 adult, Economy
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Find cheap flights from California to Illinois with Cheapflights
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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 April 29, 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 April 29, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 4/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/911:45 pm
LAS
- ORD
Nonstop3h 47m
Frontier
Wed 6/107:12 am
ORD
- LAS
Nonstop4h 16m
Frontier
Deal found 4/25![Frontier logo]()
$163
This Cheapflightsfares deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/811:40 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Wed 8/127:15 am
ORD
- LAS
Nonstop4h 03m
Frontier
Deal found 4/28![Frontier logo]()
$169
This Frontier deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3011:40 pm
LAS
- ORD
Nonstop3h 48m
Frontier
Mon 8/37:15 am
ORD
- LAS
Nonstop4h 03m
Frontier
Deal found 4/27![Frontier logo]()
$173
This Super.com deal was found by Cheapflights users on 4/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1211:45 pm
LAS
- ORD
Nonstop3h 47m
Frontier
Sun 6/147:12 am
ORD
- LAS
Nonstop4h 16m
Frontier
Deal found 4/24![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1412:59 am
LAS
- ORD
1 stop13h 17m
Frontier
Tue 5/194:05 pm
ORD
- LAS
1 stop24h 54m
Frontier
Deal found 4/27![Frontier logo]()
$177
This Cheapflightsfares deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1011:45 pm
LAS
- ORD
Nonstop3h 47m
Frontier
Sun 6/145:35 pm
ORD
- LAS
1 stop30h 40m
Frontier
Deal found 4/28![Frontier logo]()
$178
This Cheapflightsfares deal was found by Cheapflights users on 4/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:45 am
LAS
- ORD
1 stop11h 06m
Frontier
Sat 5/169:37 pm
ORD
- LAS
1 stop11h 33m
Frontier
Deal found 4/25![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Sat 5/2311:59 pm
LAX
- ORD
Nonstop4h 00m
Multiple Airlines
Fri 5/299:37 pm
ORD
- LAX
1 stop12h 58m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$179
This Frontier deal was found by Cheapflights users on 4/25. 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.
Wed 5/137:15 am
LAS
- ORD
1 stop13h 46m
Frontier
Sat 5/169:37 pm
ORD
- LAS
1 stop11h 33m
Frontier
Deal found 4/25![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 5/2311:59 pm
LAX
- ORD
Nonstop4h 00m
Multiple Airlines
Tue 5/269:37 pm
ORD
- LAX
1 stop13h 18m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$180
This eDestinos deal was found by Cheapflights users on 4/25. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:28 pm
LAX
- ORD
1 stop14h 27m
Frontier
Tue 5/129:37 pm
ORD
- LAX
1 stop13h 18m
Frontier
Deal found 4/25![Frontier logo]()
$181
This Frontier deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/233:28 pm
LAX
- ORD
1 stop14h 27m
Frontier
Sat 5/308:46 pm
ORD
- LAX
Nonstop4h 40m
Frontier
Deal found 4/27![Frontier logo]()
$182
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 April 29, 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 April 29, 2026.
This Delta deal was found by Cheapflights users on 4/26. 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 8/1911:45 pm
LAX
- MDW
1 stop6h 53m
Delta
Wed 8/265:25 pm
MDW
- LAX
1 stop7h 50m
Delta
Deal found 4/26![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1011:30 pm
LAS
- ORD
Nonstop3h 41m
United Airlines
Wed 6/249:48 pm
ORD
- LAS
Nonstop4h 05m
United Airlines
Deal found 4/28![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/248:00 pm
LAX
- MDW
1 stop7h 00m
Southwest
Sat 5/306:45 am
MDW
- LAX
Nonstop4h 25m
Southwest
Deal found 4/27![Southwest logo]()
$259
This Alaska Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:44 pm
SAN
- ORD
Nonstop4h 11m
Alaska Airlines
Thu 6/112:20 pm
ORD
- SAN
Nonstop4h 39m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 4/24. 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.
Wed 5/276:15 am
LAX
- ORD
1 stop6h 42m
Delta
Wed 5/277:45 pm
ORD
- LAX
1 stop6h 08m
Delta
Deal found 4/24![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/274:07 pm
LAS
- ORD
Nonstop3h 56m
United Airlines
Wed 6/33:54 pm
ORD
- LAS
Nonstop4h 04m
United Airlines
Deal found 4/27![United Airlines logo]()
$257
This Southwest deal was found by Cheapflights users on 4/25. 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.
Wed 9/211:40 pm
SFO
- MDW
Nonstop4h 10m
Southwest
Wed 9/93:15 pm
MDW
- SFO
1 stop8h 25m
Southwest
Deal found 4/25![Southwest logo]()
$292
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Fri 5/297:03 pm
LAS
- ORD
Nonstop3h 47m
United Airlines
Mon 6/15:00 am
ORD
- LAS
1 stop6h 07m
United Airlines
Deal found 4/25![United Airlines logo]()
$273
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:06 am
SJC
- ORD
1 stop9h 44m
Alaska Airlines
Mon 6/16:00 am
ORD
- SJC
1 stop8h 20m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$302
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:59 pm
SFO
- ORD
1 stop6h 46m
Delta
Mon 6/17:45 pm
ORD
- SFO
1 stop6h 27m
Delta
Deal found 4/28![Delta logo]()
$285
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/184:45 pm
LAX
- MDW
Nonstop3h 55m
Southwest
Thu 5/285:10 am
MDW
- LAX
1 stop6h 50m
Southwest
Deal found 4/27![Southwest logo]()
$296
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/97:10 am
LAX
- ORD
1 stop7h 35m
Delta
Wed 6/176:30 am
ORD
- LAX
1 stop9h 04m
Delta
Deal found 4/28![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2710:29 am
OAK
- ORD
1 stop6h 21m
Alaska Airlines
Fri 6/59:00 am
ORD
- OAK
1 stop7h 14m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Tue 6/27:00 am
LAX
- ORD
Nonstop4h 14m
United Airlines
Tue 6/99:20 pm
ORD
- LAX
Nonstop4h 39m
United Airlines
Deal found 4/25![United Airlines logo]()
$299
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2111:55 pm
LAX
- MDW
Nonstop4h 00m
Southwest
Wed 8/265:15 pm
MDW
- LAX
Nonstop4h 15m
Southwest
Deal found 4/27![Southwest logo]()
$308
This Alaska Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:23 pm
SNA
- ORD
1 stop7h 18m
Alaska Airlines
Wed 8/267:00 am
ORD
- SNA
1 stop8h 35m
Alaska Airlines
Deal found 4/28![Alaska Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:20 pm
SFO
- ORD
2 stops12h 16m
Delta
Tue 6/96:30 pm
ORD
- SFO
1 stop6h 55m
Delta
Deal found 4/26![Delta logo]()
$305
This Southwest deal was found by Cheapflights users on 4/26. 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.
Sun 5/3110:40 am
LAX
- MDW
1 stop5h 15m
Southwest
Tue 6/99:15 pm
MDW
- LAX
Nonstop4h 25m
Southwest
Deal found 4/26![Southwest logo]()
$314
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/203:18 pm
LAS
- ORD
1 stop5h 23m
United Airlines
Tue 8/259:00 am
ORD
- LAS
Nonstop4h 06m
United Airlines
Deal found 4/29![United Airlines logo]()
$317
This Alaska Airlines deal was found by Cheapflights users on 4/25. 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.
Tue 9/292:08 pm
SNA
- ORD
1 stop7h 33m
Alaska Airlines
Thu 10/11:03 pm
ORD
- SNA
1 stop9h 08m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 4/25. 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 6/2311:45 am
SFO
- ORD
1 stop9h 33m
Delta
Thu 7/27:01 am
ORD
- SFO
1 stop9h 15m
Delta
Deal found 4/25![Delta logo]()
$306
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Thu 6/45:00 pm
LAX
- ORD
Nonstop4h 16m
United Airlines
Wed 6/109:20 pm
ORD
- LAX
Nonstop4h 39m
United Airlines
Deal found 4/25![United Airlines logo]()
$320
This Southwest deal was found by Cheapflights users on 4/25. 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 6/26:20 am
SFO
- MDW
2 stops8h 15m
Southwest
Tue 6/95:50 pm
MDW
- SFO
2 stops7h 25m
Southwest
Deal found 4/25![Southwest logo]()
$335
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2612:28 pm
OAK
- ORD
1 stop7h 22m
Delta
Wed 6/107:37 pm
ORD
- OAK
1 stop6h 17m
Delta
Deal found 4/28![Delta logo]()
$308
This Alaska Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2812:31 pm
LAX
- ORD
1 stop8h 28m
Alaska Airlines
Tue 6/27:40 am
ORD
- LAX
2 stops12h 41m
Alaska Airlines
Deal found 4/29![Alaska Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:10 am
LAX
- ORD
Nonstop4h 15m
United Airlines
Fri 5/293:47 pm
ORD
- LAX
Nonstop4h 33m
United Airlines
Deal found 4/29![United Airlines logo]()
$322
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2310:25 am
SAN
- ORD
2 stops11h 00m
Southwest
Sat 5/302:05 pm
ORD
- SAN
1 stop8h 20m
Southwest
Deal found 4/27![Southwest logo]()
$337
This CheapOair deal was found by Cheapflights users on 4/24. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/169:46 am
SJC
- ORD
1 stop17h 14m
Alaska Airlines
Tue 6/237:59 pm
ORD
- SJC
1 stop15h 27m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$343
This Delta deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:20 pm
SFO
- ORD
2 stops12h 16m
Delta
Mon 6/87:01 am
ORD
- SFO
1 stop9h 15m
Delta
Deal found 4/26![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Wed 6/245:05 am
SFO
- ORD
Nonstop4h 26m
United Airlines
Mon 6/299:35 pm
ORD
- SFO
Nonstop4h 57m
United Airlines
Deal found 4/25![United Airlines logo]()
$331
Last-minute flights from California to IllinoisDiscover last-minute flight deals from California to Illinois. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from California to Illinois. Data last updated April 29, 2026 and is based on user searches.
This eDestinos deal was found by Cheapflights users on 4/25. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:28 pm
LAX
- ORD
1 stop14h 27m
Frontier
Tue 5/129:37 pm
ORD
- LAX
1 stop13h 18m
Frontier
Deal found 4/25![Frontier logo]()
$181
This Cheapflightsfares deal was found by Cheapflights users on 4/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:45 am
LAS
- ORD
1 stop11h 06m
Frontier
Sat 5/169:37 pm
ORD
- LAS
1 stop11h 33m
Frontier
Deal found 4/25![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 4/25. 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.
Wed 5/137:15 am
LAS
- ORD
1 stop13h 46m
Frontier
Sat 5/169:37 pm
ORD
- LAS
1 stop11h 33m
Frontier
Deal found 4/25![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1412:59 am
LAS
- ORD
1 stop13h 17m
Frontier
Tue 5/194:05 pm
ORD
- LAS
1 stop24h 54m
Frontier
Deal found 4/27![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Sat 5/1610:25 pm
LAS
- ORD
1 stop9h 02m
Frontier
Tue 5/191:59 pm
ORD
- LAS
1 stop8h 52m
Frontier
Deal found 4/26![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Sun 5/1712:31 am
LAX
- ORD
Nonstop4h 08m
Frontier
Tue 5/199:37 pm
ORD
- LAX
1 stop13h 18m
Frontier
Deal found 4/26![Frontier logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:30 am
LAS
- ORD
1 stop12h 02m
Multiple Airlines
Fri 5/298:46 pm
ORD
- LAS
1 stop12h 55m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$174
This Frontier deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/206:30 am
LAS
- ORD
1 stop12h 02m
Frontier
Wed 5/274:40 pm
ORD
- LAS
1 stop9h 14m
Frontier
Deal found 4/29![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
Sat 5/2311:59 pm
LAX
- ORD
Nonstop4h 00m
Multiple Airlines
Fri 5/299:37 pm
ORD
- LAX
1 stop12h 58m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 5/2311:59 pm
LAX
- ORD
Nonstop4h 00m
Multiple Airlines
Tue 5/269:37 pm
ORD
- LAX
1 stop13h 18m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$180
This Frontier deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/233:28 pm
LAX
- ORD
1 stop14h 27m
Frontier
Sat 5/308:46 pm
ORD
- LAX
Nonstop4h 40m
Frontier
Deal found 4/27![Frontier logo]()
$182
This CheapOair deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/233:28 pm
LAX
- ORD
1 stop14h 27m
Frontier
Tue 5/269:37 pm
ORD
- LAX
1 stop13h 18m
Frontier
Deal found 4/27![Frontier logo]()
$185
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 April 29, 2026.
Search for one-way flight options from California to Illinois. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Trip.com deal was found by Cheapflights users on 4/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2710:50 am
ONT
- ORD
1 stop7h 42m
Frontier
Deal found 4/26![Frontier logo]()
$67
This Trip.com deal was found by Cheapflights users on 4/24. 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.
Tue 5/126:00 am
ONT
- ORD
1 stop12h 32m
Frontier
Deal found 4/24![Frontier logo]()
$72
This Mytrip deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:50 am
ONT
- ORD
1 stop7h 42m
Frontier
Deal found 4/28![Frontier logo]()
$80
This Super.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:06 pm
ONT
- ORD
1 stop24h 55m
Frontier
Deal found 4/28![Frontier logo]()
$85
This Trip.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/103:34 pm
ONT
- ORD
1 stop11h 58m
Frontier
Deal found 4/28![Frontier logo]()
$86
This Trip.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/93:34 pm
ONT
- ORD
1 stop11h 58m
Frontier
Deal found 4/28![Frontier logo]()
$87
This Frontier deal was found by Cheapflights users on 4/25. 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 7/311:59 pm
LAX
- ORD
Nonstop4h 20m
Frontier
Deal found 4/25![Frontier logo]()
$97
This Super.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1712:31 am
LAX
- ORD
Nonstop4h 08m
Frontier
Deal found 4/28![Frontier logo]()
$99
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/175:00 pm
LAX
- MDW
Nonstop3h 55m
Southwest
Deal found 4/27![Southwest logo]()
$100
This United Airlines deal was found by Cheapflights users on 4/25. 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.
Wed 5/272:41 pm
LAX
- ORD
Nonstop4h 09m
United Airlines
Deal found 4/25![United Airlines logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/1411:59 pm
LAX
- ORD
Nonstop4h 20m
Frontier
Deal found 4/28![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 4/25. 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.
Sun 6/1411:59 pm
LAX
- ORD
Nonstop4h 00m
Spirit Airlines
Deal found 4/25![Spirit Airlines logo]()
$102
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 April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $163 (Cheapflightsfares) |
One-way from | $67 (Trip.com) |
Popular in | February |
Cheapest in | September |
Average price | $323 |
Good round-trip deal | $322 or less |
Good one-way deal | $166 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 April 29, 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
Wed 8/19
11:45 pm-8:38 am
1 stop6h 53m
Chicago Midway
Wed 8/26
5:25 pm-11:15 pm
1 stop7h 50m
$237
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Wed 5/27
6:15 am-2:57 pm
1 stop6h 42m
Chicago O'Hare Intl
Wed 5/27
7:45 pm-11:53 pm
1 stop6h 08m
$237
Quickest round-trip
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Wed 6/10
11:30 pm-5:11 am
Nonstop3h 41m
Chicago O'Hare Intl
Wed 6/24
9:48 pm-11:53 pm
Nonstop4h 05m
$257
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Wed 5/27
4:07 pm-10:03 pm
Nonstop3h 56m
Chicago O'Hare Intl
Wed 6/3
3:54 pm-5:58 pm
Nonstop4h 04m
$257
Los AngelesChicago
LAX - MDW
LAXMDW
Los Angeles
Sun 5/24
8:00 pm-5:00 am
1 stop7h 00m
Chicago Midway
Sat 5/30
6:45 am-9:10 am
Nonstop4h 25m
$259
Las VegasChicago
LAS - ORD
LASORD
Las Vegas Harry Reid Intl
Fri 5/29
7:03 pm-12:50 am
Nonstop3h 47m
Chicago O'Hare Intl
Mon 6/1
5:00 am-9:07 am
1 stop6h 07m
$273
San FranciscoChicago
SFO - ORD
SFOORD
San Francisco
Thu 5/28
11:59 pm-8:45 am
1 stop6h 46m
Chicago O'Hare Intl
Mon 6/1
7:45 pm-12:12 am
1 stop6h 27m
$285
San DiegoChicago
SAN - ORD
SANORD
San Diego
Sat 6/6
5:44 pm-11:55 pm
Nonstop4h 11m
Chicago O'Hare Intl
Thu 6/11
2:20 pm-4:59 pm
Nonstop4h 39m
$292
San FranciscoChicago
SFO - MDW
SFOMDW
San Francisco
Wed 9/2
11:40 pm-5:50 am
Nonstop4h 10m
Chicago Midway
Wed 9/9
3:15 pm-9:40 pm
1 stop8h 25m
$292
Los AngelesChicago
LAX - MDW
LAXMDW
Los Angeles
Mon 5/18
4:45 pm-10:40 pm
Nonstop3h 55m
Chicago Midway
Thu 5/28
5:10 am-10:00 am
1 stop6h 50m
$296
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.
LAS-ORD
LAX-ORD
ONT-ORD
LAX-MDW
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
LAS-ORD
LAX-ORD
ONT-ORD
LAX-MDW
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 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 $301). Flying from California to Illinois in December is currently the most expensive (average of $416). 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 April 29, 2026.
It’s typically best to fly out from California to Illinois in the afternoon. Doing so could potentially save you 22% on the flight price compared to flying at noon, which is usually more expensive.
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 April 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 evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 April 29, 2026.
The most flights from USCA to USIL are scheduled on a Wednesday (107 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (52 on average).
How much does it cost to fly round-trip from California to Illinois?
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated April 29, 2026.
See what other customers who have flown with Southwest,United Airlines, andAmerican 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.
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from 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 April 29, 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 9 airlines flying from California to Illinois
Discover the top 9 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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$91 | Average$250 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$92 | Average$207 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$93 | Average$364 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$101 | Average$233 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$133 | Average$458 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$147 | Average$369 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$157 | Average$500 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$166 | Average$341 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$179 | Average$419 | FlexibilityNo cancel fee | On-time63% |