$121+ Cheap flights from Islip, NY (ISP) to California
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAX
Jul 26 — Aug 21
Round-trip
1 adult, Economy
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Find cheap flights from Islip to California with Cheapflights
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Cheapest flights from Islip to CaliforniaExplore the most affordable flight options available from Islip to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2026.
Explore the most affordable flight options available from Islip to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 26, 2026.
This Travelocity deal was found by Cheapflights users on 6/23. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:09 pm
ISP
- LAS
1 stop19h 39m
Frontier
Thu 9/2410:12 pm
LAS
- ISP
1 stop8h 21m
Frontier
Deal found 6/23![Frontier logo]()
$240
This Frontier deal was found by Cheapflights users on 6/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Sat 9/129:56 pm
LAX
- ISP
1 stop8h 37m
Frontier
Deal found 6/23![Frontier logo]()
$242
This Expedia deal was found by Cheapflights users on 6/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/37:46 pm
ISP
- LAS
1 stop31h 33m
Frontier
Thu 8/610:11 pm
LAS
- ISP
1 stop17h 50m
Frontier
Deal found 6/24![Frontier logo]()
$274
This Frontier deal was found by Cheapflights users on 6/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/410:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Sat 9/129:56 pm
LAX
- ISP
1 stop8h 37m
Frontier
Deal found 6/21![Frontier logo]()
$275
This Frontier deal was found by Cheapflights users on 6/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2910:57 am
ISP
- LAS
1 stop12h 13m
Frontier
Fri 7/319:42 pm
LAS
- ISP
1 stop9h 11m
Frontier
Deal found 6/21![Frontier logo]()
$297
This Frontier deal was found by Cheapflights users on 6/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3110:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Wed 9/99:56 pm
LAX
- ISP
1 stop8h 37m
Frontier
Deal found 6/21![Frontier logo]()
$305
This Expedia deal was found by Cheapflights users on 6/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/137:46 pm
ISP
- LAS
1 stop31h 33m
Frontier
Fri 7/2412:27 pm
LAS
- ISP
1 stop18h 26m
Frontier
Deal found 6/21![Frontier logo]()
$328
This Frontier deal was found by Cheapflights users on 6/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:57 am
ISP
- LAS
1 stop13h 47m
Frontier
Mon 8/319:41 pm
LAS
- ISP
1 stop9h 12m
Frontier
Deal found 6/23![Frontier logo]()
$331
This Frontier deal was found by Cheapflights users on 6/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Wed 9/211:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 6/24![Frontier logo]()
$332
This Frontier deal was found by Cheapflights users on 6/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/410:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Thu 9/109:56 pm
LAX
- ISP
1 stop8h 37m
Frontier
Deal found 6/21![Frontier logo]()
$338
This Frontier deal was found by Cheapflights users on 6/25. 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 9/810:57 am
ISP
- LAS
1 stop13h 47m
Frontier
Sat 9/1210:12 pm
LAS
- ISP
1 stop8h 21m
Frontier
Deal found 6/25![Frontier logo]()
$361
This Frontier deal was found by Cheapflights users on 6/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/610:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Wed 9/99:56 pm
LAX
- ISP
1 stop8h 37m
Frontier
Deal found 6/21![Frontier logo]()
$362
Best flights from Islip to CaliforniaDiscover carefully curated flight deals from Islip to California that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 26, 2026.
Discover carefully curated flight deals from Islip to California that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 26, 2026.
This Southwest deal was found by Cheapflights users on 6/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/244:05 pm
ISP
- SAN
1 stop9h 40m
Southwest
Sat 8/2910:40 pm
SAN
- ISP
1 stop8h 15m
Southwest
Deal found 6/21![Southwest logo]()
$372
This Frontier deal was found by Cheapflights users on 6/25. 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 8/710:57 am
ISP
- LAS
1 stop13h 20m
Frontier
Fri 8/219:41 pm
LAS
- ISP
1 stop9h 12m
Frontier
Deal found 6/25![Frontier logo]()
$395
This Expedia deal was found by Cheapflights users on 6/25. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:00 am
ISP
- LAS
1 stop15h 18m
Multiple Airlines
Thu 7/309:42 pm
LAS
- ISP
1 stop9h 11m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$431
This JetBlue deal was found by Cheapflights users on 6/21. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:00 am
ISP
- LAX
1 stop10h 20m
JetBlue
Wed 7/298:45 am
LAX
- ISP
1 stop9h 59m
JetBlue
Deal found 6/21![JetBlue logo]()
$457
This Southwest deal was found by Cheapflights users on 6/24. 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.
Thu 9/310:20 am
ISP
- SAN
1 stop8h 55m
Southwest
Sat 9/510:30 am
SAN
- ISP
1 stop7h 15m
Southwest
Deal found 6/24![Southwest logo]()
$372
This Southwest deal was found by Cheapflights users on 6/25. 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 7/286:00 am
ISP
- SAN
2 stops9h 00m
Southwest
Wed 8/57:20 am
SAN
- ISP
2 stops10h 45m
Southwest
Deal found 6/25![Southwest logo]()
$373
This Frontier deal was found by Cheapflights users on 6/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2510:57 am
ISP
- LAS
1 stop13h 47m
Frontier
Wed 8/269:41 pm
LAS
- ISP
1 stop9h 12m
Frontier
Deal found 6/24![Frontier logo]()
$416
This Southwest deal was found by Cheapflights users on 6/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2912:25 pm
ISP
- LAX
2 stops10h 20m
Southwest
Wed 8/58:30 pm
LAX
- ISP
2 stops10h 10m
Southwest
Deal found 6/22![Southwest logo]()
$373
This JetBlue deal was found by Cheapflights users on 6/21. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/214:58 pm
ISP
- LAX
1 stop10h 00m
JetBlue
Tue 7/288:45 am
LAX
- ISP
1 stop9h 59m
JetBlue
Deal found 6/21![JetBlue logo]()
$457
This Frontier deal was found by Cheapflights users on 6/25. 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 7/1010:57 am
ISP
- LAS
1 stop13h 20m
Frontier
Tue 7/149:42 pm
LAS
- ISP
1 stop9h 11m
Frontier
Deal found 6/25![Frontier logo]()
$439
This KAYAK deal was found by Cheapflights users on 6/22. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:49 pm
ISP
- SNA
2 stops23h 26m
Breeze Airways
Thu 8/277:30 am
SNA
- ISP
3 stops26h 58m
Breeze Airways
Deal found 6/22![Breeze Airways logo]()
$1,012
This Southwest deal was found by Cheapflights users on 6/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:50 am
ISP
- LAX
1 stop14h 30m
Southwest
Mon 10/2610:20 pm
LAX
- ISP
1 stop11h 20m
Southwest
Deal found 6/22![Southwest logo]()
$386
This JetBlue deal was found by Cheapflights users on 6/21. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/284:58 pm
ISP
- LAX
1 stop10h 00m
JetBlue
Tue 8/48:45 am
LAX
- ISP
1 stop9h 59m
JetBlue
Deal found 6/21![JetBlue logo]()
$508
This Southwest deal was found by Cheapflights users on 6/24. 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.
Thu 8/2712:35 pm
ISP
- SNA
2 stops10h 00m
Southwest
Mon 8/318:55 am
SNA
- ISP
2 stops10h 10m
Southwest
Deal found 6/24![Southwest logo]()
$391
This JetBlue deal was found by Cheapflights users on 6/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/304:58 pm
ISP
- LAX
1 stop10h 00m
JetBlue
Wed 8/58:50 am
LAX
- ISP
1 stop9h 54m
JetBlue
Deal found 6/22![JetBlue logo]()
$508
This Southwest deal was found by Cheapflights users on 6/24. 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.
Thu 8/276:10 am
ISP
- ONT
2 stops10h 50m
Southwest
Mon 8/318:10 am
ONT
- ISP
2 stops10h 55m
Southwest
Deal found 6/24![Southwest logo]()
$391
This JetBlue deal was found by Cheapflights users on 6/23. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/156:00 am
ISP
- LAX
1 stop10h 20m
JetBlue
Sat 7/188:45 am
LAX
- ISP
1 stop9h 59m
JetBlue
Deal found 6/23![JetBlue logo]()
$523
This Southwest deal was found by Cheapflights users on 6/25. 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.
Thu 8/276:10 am
ISP
- LAS
2 stops9h 10m
Southwest
Sun 8/306:45 am
LAS
- ISP
2 stops9h 00m
Southwest
Deal found 6/25![Southwest logo]()
$408
This Southwest deal was found by Cheapflights users on 6/24. 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.
Wed 8/123:20 pm
ISP
- SAN
1 stop7h 15m
Southwest
Sun 8/168:55 pm
SAN
- ISP
2 stops9h 45m
Southwest
Deal found 6/24![Southwest logo]()
$420
This Southwest deal was found by Cheapflights users on 6/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/64:15 pm
ISP
- SAN
1 stop8h 10m
Southwest
Thu 9/1011:45 am
SAN
- ISP
1 stop7h 20m
Southwest
Deal found 6/22![Southwest logo]()
$424
This Southwest deal was found by Cheapflights users on 6/24. 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.
Thu 11/512:25 pm
ISP
- LAS
1 stop12h 35m
Southwest
Sun 11/810:20 pm
LAS
- ISP
1 stop10h 25m
Southwest
Deal found 6/24![Southwest logo]()
$424
This KAYAK deal was found by Cheapflights users on 6/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:49 pm
ISP
- SNA
2 stops23h 26m
Breeze Airways
Sun 8/237:45 am
SNA
- ISP
3 stops26h 43m
Breeze Airways
Deal found 6/25![Breeze Airways logo]()
$1,058
This Southwest deal was found by Cheapflights users on 6/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:05 am
ISP
- SAN
2 stops9h 55m
Southwest
Sun 9/137:55 pm
SAN
- ISP
2 stops10h 45m
Southwest
Deal found 6/22![Southwest logo]()
$425
This KAYAK deal was found by Cheapflights users on 6/22. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:49 pm
ISP
- SNA
2 stops23h 26m
Breeze Airways
Wed 8/267:30 am
SNA
- ISP
3 stops31h 36m
Breeze Airways
Deal found 6/22![Breeze Airways logo]()
$1,069
This United deal was found by Cheapflights users on 6/22. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:30 pm
ISP
- ONT
2 stops13h 19m
Multiple Airlines
Mon 10/266:00 am
ONT
- ISP
2 stops10h 45m
Multiple Airlines
Deal found 6/22![Multiple Airlines logo]()
$1,195
This Southwest deal was found by Cheapflights users on 6/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:00 am
ISP
- SAN
2 stops10h 45m
Southwest
Sun 7/2610:40 pm
SAN
- ISP
2 stops10h 10m
Southwest
Deal found 6/21![Southwest logo]()
$425
This KAYAK deal was found by Cheapflights users on 6/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/218:43 pm
ISP
- SNA
3 stops24h 02m
Breeze Airways
Mon 8/247:30 am
SNA
- ISP
2 stops24h 46m
Breeze Airways
Deal found 6/25![Breeze Airways logo]()
$1,078
This Southwest deal was found by Cheapflights users on 6/23. 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 7/253:30 pm
ISP
- LAX
2 stops10h 40m
Southwest
Tue 8/259:45 am
LAX
- ISP
2 stops8h 20m
Southwest
Deal found 6/23![Southwest logo]()
$425
This KAYAK deal was found by Cheapflights users on 6/22. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/222:33 pm
ISP
- SNA
3 stops27h 50m
Breeze Airways
Wed 7/291:10 pm
SNA
- ISP
2 stops45h 18m
Breeze Airways
Deal found 6/22![Breeze Airways logo]()
$1,092
This Southwest deal was found by Cheapflights users on 6/24. 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.
Thu 8/271:15 pm
ISP
- LAX
2 stops11h 05m
Southwest
Fri 9/45:05 am
LAX
- ISP
1 stop8h 20m
Southwest
Deal found 6/24![Southwest logo]()
$429
Last-minute flights from Islip to CaliforniaDiscover last-minute flight deals from Islip to California. Data last updated June 26, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to California. Data last updated June 26, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/25. 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.
Sat 7/1110:43 am
ISP
- LAS
1 stop12h 27m
Frontier
Tue 7/149:42 pm
LAS
- ISP
1 stop9h 11m
Frontier
Deal found 6/25![Frontier logo]()
$388
This Expedia deal was found by Cheapflights users on 6/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/137:46 pm
ISP
- LAS
1 stop31h 33m
Frontier
Fri 7/2412:27 pm
LAS
- ISP
1 stop18h 26m
Frontier
Deal found 6/21![Frontier logo]()
$328
This Southwest deal was found by Cheapflights users on 6/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/214:40 pm
ISP
- LAX
2 stops9h 25m
Southwest
Tue 7/286:45 pm
LAX
- ISP
2 stops10h 20m
Southwest
Deal found 6/21![Southwest logo]()
$395
This Frontier deal was found by Cheapflights users on 6/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2210:57 am
ISP
- LAX
1 stop10h 01m
Frontier
Wed 8/2611:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 6/23![Frontier logo]()
$390
This Frontier deal was found by Cheapflights users on 6/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2210:57 am
ISP
- LAX
1 stop10h 01m
Frontier
Thu 8/2711:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 6/23![Frontier logo]()
$399
This Booking.com deal was found by Cheapflights users on 6/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2210:57 am
ISP
- LAX
1 stop10h 01m
Frontier
Mon 7/2711:00 pm
LAX
- ISP
1 stop31h 53m
Frontier
Deal found 6/22![Frontier logo]()
$409
This Frontier deal was found by Cheapflights users on 6/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2410:57 am
ISP
- LAX
1 stop10h 00m
Frontier
Wed 8/2611:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 6/23![Frontier logo]()
$386
This Southwest deal was found by Cheapflights users on 6/25. 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 7/284:40 pm
ISP
- SAN
2 stops9h 20m
Southwest
Wed 8/510:40 pm
SAN
- ISP
1 stop8h 00m
Southwest
Deal found 6/25![Southwest logo]()
$368
This Southwest deal was found by Cheapflights users on 6/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/284:40 pm
ISP
- LAX
1 stop8h 00m
Southwest
Tue 8/48:30 pm
LAX
- ISP
2 stops10h 45m
Southwest
Deal found 6/22![Southwest logo]()
$368
This Southwest deal was found by Cheapflights users on 6/23. 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.
Tue 7/286:00 am
ISP
- LAS
1 stop9h 35m
Southwest
Fri 7/316:50 am
LAS
- ISP
1 stop7h 25m
Southwest
Deal found 6/23![Southwest logo]()
$401
This Frontier deal was found by Cheapflights users on 6/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2910:57 am
ISP
- LAS
1 stop12h 13m
Frontier
Fri 7/319:42 pm
LAS
- ISP
1 stop9h 11m
Frontier
Deal found 6/21![Frontier logo]()
$297
This Southwest deal was found by Cheapflights users on 6/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2912:25 pm
ISP
- LAX
2 stops10h 20m
Southwest
Wed 8/58:30 pm
LAX
- ISP
2 stops10h 10m
Southwest
Deal found 6/22![Southwest logo]()
$373
One-way flights from Islip to CaliforniaSearch for one-way flight options from Islip to California. Find affordable one-way fares based on user searches. Data last updated June 26, 2026.
Search for one-way flight options from Islip to California. Find affordable one-way fares based on user searches. Data last updated June 26, 2026.
This Frontier deal was found by Cheapflights users on 6/25. 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 8/510:57 am
ISP
- LAX
1 stop10h 01m
Frontier
Deal found 6/25![Frontier logo]()
$121
This Priceline deal was found by Cheapflights users on 6/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2910:57 am
ISP
- LAX
1 stop10h 01m
Frontier
Deal found 6/24![Frontier logo]()
$122
This Trip.com deal was found by Cheapflights users on 6/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/104:13 pm
ISP
- LAS
1 stop20h 13m
Frontier
Deal found 6/23![Frontier logo]()
$130
This Frontier deal was found by Cheapflights users on 6/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2210:57 am
ISP
- LAS
1 stop12h 13m
Frontier
Deal found 6/24![Frontier logo]()
$149
This Frontier deal was found by Cheapflights users on 6/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/610:57 am
ISP
- LAS
1 stop13h 47m
Frontier
Deal found 6/23![Frontier logo]()
$160
This Southwest deal was found by Cheapflights users on 6/25. 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 9/3012:55 pm
ISP
- LAS
2 stops8h 45m
Southwest
Deal found 6/25![Southwest logo]()
$170
This Frontier deal was found by Cheapflights users on 6/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1510:57 am
ISP
- LAX
1 stop10h 01m
Frontier
Deal found 6/24![Frontier logo]()
$175
This Southwest deal was found by Cheapflights users on 6/23. 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.
Wed 7/292:55 pm
ISP
- LAX
1 stop9h 45m
Southwest
Deal found 6/23![Southwest logo]()
$182
This Frontier deal was found by Cheapflights users on 6/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2910:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Deal found 6/23![Frontier logo]()
$184
This Priceline deal was found by Cheapflights users on 6/23. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1810:43 am
ISP
- LAX
1 stop10h 15m
Frontier
Deal found 6/23![Frontier logo]()
$185
This Southwest deal was found by Cheapflights users on 6/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2212:25 pm
ISP
- LAX
2 stops10h 50m
Southwest
Deal found 6/22![Southwest logo]()
$187
This Frontier deal was found by Cheapflights users on 6/24. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:57 am
ISP
- LAS
1 stop13h 47m
Frontier
Deal found 6/24![Frontier logo]()
$190
Find flight deals from Islip to California
Keep the following information in mind while searching for Islip to California flight deals. Data was last updated June 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $240 (Travelocity) |
One-way from | $121 (Frontier) |
Popular in | June |
Cheapest in | January |
Average price | $471 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to California that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 26, 2026.
Use the filters below to find and compare flights from Islip to California that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Mon 8/24
4:05 pm-10:45 pm
1 stop9h 40m
San Diego
Sat 8/29
10:40 pm-9:55 am
1 stop8h 15m
$372
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Thu 9/3
10:20 am-4:15 pm
1 stop8h 55m
San Diego
Sat 9/5
10:30 am-8:45 pm
1 stop7h 15m
$372
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Tue 7/28
6:00 am-12:00 pm
2 stops9h 00m
San Diego
Wed 8/5
7:20 am-9:05 pm
2 stops10h 45m
$373
IslipLos Angeles
ISP - LAX
ISPLAX
Islip Long Island
Wed 7/29
12:25 pm-7:45 pm
2 stops10h 20m
Los Angeles
Wed 8/5
8:30 pm-9:40 am
2 stops10h 10m
$373
IslipLos Angeles
ISP - LAX
ISPLAX
Islip Long Island
Thu 10/22
6:50 am-6:20 pm
1 stop14h 30m
Los Angeles
Mon 10/26
10:20 pm-12:40 pm
1 stop11h 20m
$386
IslipSanta Ana
ISP - SNA
ISPSNA
Islip Long Island
Thu 8/27
12:35 pm-7:35 pm
2 stops10h 00m
Santa Ana J. Wayne/Orange Cnty
Mon 8/31
8:55 am-10:05 pm
2 stops10h 10m
$391
IslipOntario
ISP - ONT
ISPONT
Islip Long Island
Thu 8/27
6:10 am-2:00 pm
2 stops10h 50m
Ontario
Mon 8/31
8:10 am-10:05 pm
2 stops10h 55m
$391
IslipLas Vegas
ISP - LAS
ISPLAS
Islip Long Island
Fri 8/7
10:57 am-9:17 pm
1 stop13h 20m
Las Vegas Harry Reid Intl
Fri 8/21
9:41 pm-9:53 am
1 stop9h 12m
$395
IslipLas Vegas
ISP - LAS
ISPLAS
Islip Long Island
Thu 8/27
6:10 am-12:20 pm
2 stops9h 10m
Las Vegas Harry Reid Intl
Sun 8/30
6:45 am-6:45 pm
2 stops9h 00m
$408
IslipLas Vegas
ISP - LAS
ISPLAS
Islip Long Island
Tue 8/25
10:57 am-9:44 pm
1 stop13h 47m
Las Vegas Harry Reid Intl
Wed 8/26
9:41 pm-9:53 am
1 stop9h 12m
$416
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Islip to California
Have a flexible travel schedule? Discover the best time to fly to California from Islip with our price prediction graph.
ISP-LAX
ISP-LAS
ISP-SNA
ISP-LGB
ISP-SFO
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 Islip to California
ISP-USCA
ISP-LAX
ISP-LAS
ISP-SNA
ISP-LGB
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing California
Get insights into the airlines that provide service to California. 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 California. Reviews last updated June 26, 2026.
Read through reviews of airlines operating flights from Islip to California, such as Southwest. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Overall
7.9
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Entertainment
7.5
Overall
7.9
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Islip to California. 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 Islip to California
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Complete your trip
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Islip and California flights
Browse other Islip and California flight options. Last updated on June 26, 2026.
Popular flight searches
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Islip to California flights
Consider these flights traveling from Islip to California.
Top airline flying from Islip to California
Discover the top airline that operate flights from Islip to California. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$350 | Average$558 | FlexibilityNo cancel fee | On-time63% |