$150+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LAX
Aug 7 — Aug 141
Round-trip
1 adult, Economy
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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 July 8, 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 July 8, 2026.
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/256:05 am
ISP
- SAN
1 stop8h 25m
Southwest
Tue 9/110:40 pm
SAN
- ISP
1 stop8h 35m
Southwest
Deal found 7/7![Southwest logo]()
$264
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:55 am
ISP
- LAX
1 stop10h 10m
Southwest
Tue 9/2210:35 pm
LAX
- ISP
1 stop8h 40m
Southwest
Deal found 7/8![Southwest logo]()
$264
This Frontier deal was found by Cheapflights users on 7/7. 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 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 7/7![Frontier logo]()
$268
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 8/2010:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Wed 8/2611:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 7/3![Frontier logo]()
$278
This Southwest deal was found by Cheapflights users on 7/7. 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.
Wed 8/193:20 pm
ISP
- LAX
1 stop10h 15m
Southwest
Mon 8/2410:35 pm
LAX
- ISP
1 stop8h 40m
Southwest
Deal found 7/7![Southwest logo]()
$282
This Frontier deal was found by Cheapflights users on 7/8. 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 8/710:57 am
ISP
- LAX
1 stop10h 39m
Frontier
Wed 8/1911:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 7/8![Frontier logo]()
$288
This Trip.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:46 pm
ISP
- LAS
1 stop31h 33m
Frontier
Sat 8/229:41 pm
LAS
- ISP
1 stop9h 12m
Frontier
Deal found 7/4![Frontier logo]()
$289
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 7/3![Frontier logo]()
$295
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 8/2010:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Sun 8/2311:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 7/3![Frontier logo]()
$298
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/256:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Tue 9/2910:30 pm
SFO
- ISP
1 stop8h 45m
Southwest
Deal found 7/7![Southwest logo]()
$300
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/256:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Wed 9/3010:30 pm
SFO
- ISP
1 stop13h 00m
Southwest
Deal found 7/7![Southwest logo]()
$306
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:40 pm
ISP
- LAX
1 stop9h 50m
Southwest
Mon 10/269:50 pm
LAX
- ISP
1 stop11h 20m
Southwest
Deal found 7/8![Southwest logo]()
$306
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 July 8, 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 July 8, 2026.
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/2512:55 pm
ISP
- SAN
2 stops9h 00m
Southwest
Tue 9/110:40 pm
SAN
- ISP
1 stop8h 35m
Southwest
Deal found 7/7![Southwest logo]()
$270
This Frontier deal was found by Cheapflights users on 7/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Sun 8/2311:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 7/5![Frontier logo]()
$415
This JetBlue deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” 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 8/184:58 pm
ISP
- LAX
1 stop10h 01m
JetBlue
Tue 8/258:50 am
LAX
- ISP
1 stop9h 59m
JetBlue
Deal found 7/4![JetBlue logo]()
$457
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/256:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Tue 9/2910:30 pm
SFO
- ISP
1 stop8h 45m
Southwest
Deal found 7/7![Southwest logo]()
$300
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/256:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Thu 10/18:40 am
SFO
- ISP
2 stops11h 55m
Southwest
Deal found 7/7![Southwest logo]()
$306
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/256:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Wed 9/3010:30 pm
SFO
- ISP
1 stop13h 00m
Southwest
Deal found 7/7![Southwest logo]()
$306
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:40 pm
ISP
- LAX
1 stop9h 50m
Southwest
Mon 10/2611:05 pm
LAX
- ISP
2 stops10h 05m
Southwest
Deal found 7/8![Southwest logo]()
$306
This Frontier deal was found by Cheapflights users on 7/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Fri 8/2811:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 7/5![Frontier logo]()
$425
This United deal was found by Cheapflights users on 7/8. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:05 am
ISP
- ONT
2 stops12h 56m
Multiple Airlines
Tue 9/221:18 pm
ONT
- ISP
2 stops25h 23m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$867
This Southwest deal was found by Cheapflights users on 7/7. 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.
Wed 8/196:05 am
ISP
- SNA
2 stops10h 55m
Southwest
Wed 8/267:55 pm
SNA
- ISP
2 stops10h 45m
Southwest
Deal found 7/7![Southwest logo]()
$311
This KAYAK deal was found by Cheapflights users on 7/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/312:28 pm
ISP
- SNA
3 stops30h 17m
Breeze Airways
Sat 8/81:10 pm
SNA
- ISP
3 stops25h 56m
Breeze Airways
Deal found 7/7![Breeze Airways logo]()
$1,039
This Southwest deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 9/212:55 pm
ISP
- LAX
1 stop8h 10m
Southwest
Tue 9/810:55 pm
LAX
- ISP
1 stop13h 00m
Southwest
Deal found 7/3![Southwest logo]()
$342
This Southwest deal was found by Cheapflights users on 7/7. 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.
Wed 8/196:05 am
ISP
- LGB
2 stops10h 05m
Southwest
Wed 8/268:00 am
LGB
- ISP
2 stops10h 05m
Southwest
Deal found 7/7![Southwest logo]()
$346
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 10/139:40 am
ISP
- SFO
1 stop7h 55m
Southwest
Fri 10/239:35 am
SFO
- ISP
2 stops11h 00m
Southwest
Deal found 7/7![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 7/7. 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.
Wed 8/1210:55 am
ISP
- SAN
1 stop8h 20m
Southwest
Sat 8/157:35 am
SAN
- ISP
1 stop10h 10m
Southwest
Deal found 7/7![Southwest logo]()
$366
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/183:20 pm
ISP
- LAX
1 stop10h 15m
Southwest
Fri 8/289:55 am
LAX
- ISP
1 stop9h 10m
Southwest
Deal found 7/7![Southwest logo]()
$366
This Southwest deal was found by Cheapflights users on 7/7. 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 8/206:10 am
ISP
- LGB
2 stops9h 35m
Southwest
Thu 8/2710:15 am
LGB
- ISP
2 stops8h 50m
Southwest
Deal found 7/7![Southwest logo]()
$394
This United deal was found by Cheapflights users on 7/7. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/117:30 am
ISP
- SNA
2 stops33h 19m
Multiple Airlines
Mon 12/146:28 pm
SNA
- ISP
3 stops17h 53m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$1,036
This KAYAK deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 7/312:28 pm
ISP
- SNA
3 stops30h 17m
Breeze Airways
Sun 8/97:45 am
SNA
- ISP
3 stops26h 43m
Breeze Airways
Deal found 7/3![Breeze Airways logo]()
$1,056
This Southwest deal was found by Cheapflights users on 7/7. 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.
Wed 9/3012:55 pm
ISP
- LAS
2 stops8h 40m
Southwest
Wed 10/76:50 am
LAS
- ISP
2 stops10h 05m
Southwest
Deal found 7/7![Southwest logo]()
$394
This KAYAK deal was found by Cheapflights users on 7/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:25 am
ISP
- OAK
2 stops33h 39m
Multiple Airlines
Mon 11/165:13 pm
OAK
- ISP
2 stops17h 11m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$1,040
This Booking.com deal was found by Cheapflights users on 7/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:49 pm
ISP
- SNA
3 stops43h 26m
Breeze Airways
Sat 8/87:30 am
SNA
- ISP
3 stops31h 36m
Breeze Airways
Deal found 7/5![Breeze Airways logo]()
$1,094
This KAYAK deal was found by Cheapflights users on 7/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:25 am
ISP
- OAK
2 stops33h 39m
Multiple Airlines
Sat 11/145:13 pm
OAK
- ISP
2 stops14h 45m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$1,040
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/1112:55 pm
ISP
- SAN
2 stops9h 00m
Southwest
Fri 8/1410:10 am
SAN
- ISP
2 stops8h 55m
Southwest
Deal found 7/7![Southwest logo]()
$406
This KAYAK deal was found by Cheapflights users on 7/5. 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 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
Mon 8/247:30 am
SNA
- ISP
2 stops24h 46m
Breeze Airways
Deal found 7/5![Breeze Airways logo]()
$1,108
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/183:20 pm
ISP
- LAS
1 stop7h 40m
Southwest
Sun 8/2311:00 pm
LAS
- ISP
1 stop7h 40m
Southwest
Deal found 7/7![Southwest logo]()
$406
This KAYAK deal was found by Cheapflights users on 7/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:30 pm
ISP
- OAK
2 stops28h 34m
Multiple Airlines
Sun 11/155:13 pm
OAK
- ISP
2 stops14h 45m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$1,090
This Southwest deal was found by Cheapflights users on 7/6. 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.
Tue 8/43:20 pm
ISP
- SAN
2 stops10h 15m
Southwest
Tue 8/1110:40 pm
SAN
- ISP
2 stops10h 30m
Southwest
Deal found 7/6![Southwest logo]()
$412
This KAYAK deal was found by Cheapflights users on 7/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1612:30 pm
ISP
- OAK
2 stops28h 34m
Multiple Airlines
Sun 11/155:13 pm
OAK
- ISP
2 stops19h 08m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$1,090
This Southwest deal was found by Cheapflights users on 7/7. 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.
Wed 9/212:55 pm
ISP
- LAS
2 stops8h 40m
Southwest
Sun 9/611:10 am
LAS
- ISP
2 stops8h 35m
Southwest
Deal found 7/7![Southwest logo]()
$416
Last-minute flights from Islip to CaliforniaDiscover last-minute flight deals from Islip to California. Data last updated July 8, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to California. Data last updated July 8, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 7/5. 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.
Mon 8/37:46 pm
ISP
- LAS
1 stop31h 33m
Frontier
Tue 8/119:42 pm
LAS
- ISP
1 stop9h 11m
Frontier
Deal found 7/5![Frontier logo]()
$328
This Frontier deal was found by Cheapflights users on 7/8. 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 8/710:57 am
ISP
- LAX
1 stop10h 39m
Frontier
Wed 8/1911:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 7/8![Frontier logo]()
$288
This Frontier deal was found by Cheapflights users on 7/6. 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.
Fri 8/710:57 am
ISP
- LAX
1 stop10h 39m
Frontier
Thu 8/2011:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 7/6![Frontier logo]()
$308
This Trip.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:46 pm
ISP
- LAS
1 stop31h 33m
Frontier
Sat 8/229:41 pm
LAS
- ISP
1 stop9h 12m
Frontier
Deal found 7/4![Frontier logo]()
$289
This Southwest deal was found by Cheapflights users on 7/7. 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.
Wed 8/193:20 pm
ISP
- LAX
1 stop10h 15m
Southwest
Mon 8/2410:35 pm
LAX
- ISP
1 stop8h 40m
Southwest
Deal found 7/7![Southwest logo]()
$282
This Frontier deal was found by Cheapflights users on 7/5. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Wed 8/2611:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 7/5![Frontier logo]()
$309
This Southwest deal was found by Cheapflights users on 7/7. 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.
Wed 8/196:05 am
ISP
- SNA
2 stops10h 55m
Southwest
Wed 8/267:55 pm
SNA
- ISP
2 stops10h 45m
Southwest
Deal found 7/7![Southwest logo]()
$311
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 8/2010:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Wed 8/2611:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 7/3![Frontier logo]()
$278
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 8/2010:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Sun 8/2311:20 pm
LAX
- ISP
1 stop15h 54m
Frontier
Deal found 7/3![Frontier logo]()
$298
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/256:05 am
ISP
- SAN
1 stop8h 25m
Southwest
Tue 9/110:40 pm
SAN
- ISP
1 stop8h 35m
Southwest
Deal found 7/7![Southwest logo]()
$264
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/256:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Tue 9/2910:30 pm
SFO
- ISP
1 stop8h 45m
Southwest
Deal found 7/7![Southwest logo]()
$300
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/256:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Wed 9/3010:30 pm
SFO
- ISP
1 stop13h 00m
Southwest
Deal found 7/7![Southwest logo]()
$306
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 July 8, 2026.
Search for one-way flight options from Islip to California. Find affordable one-way fares based on user searches. Data last updated July 8, 2026.
This Southwest deal was found by Cheapflights users on 7/7. 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.
Tue 8/256:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Deal found 7/7![Southwest logo]()
$150
This Southwest deal was found by Cheapflights users on 7/7. 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.
Wed 10/284:20 pm
ISP
- LAS
1 stop8h 25m
Southwest
Deal found 7/7![Southwest logo]()
$150
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:05 pm
ISP
- LAX
1 stop9h 35m
Southwest
Deal found 7/8![Southwest logo]()
$150
This Frontier deal was found by Cheapflights users on 7/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/710:57 am
ISP
- LAX
1 stop10h 39m
Frontier
Deal found 7/7![Frontier logo]()
$154
This Southwest deal was found by Cheapflights users on 7/7. 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.
Wed 11/412:25 pm
ISP
- LAS
2 stops11h 10m
Southwest
Deal found 7/7![Southwest logo]()
$156
This Southwest deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/55:40 pm
ISP
- LAX
2 stops9h 30m
Southwest
Deal found 7/8![Southwest logo]()
$156
This Frontier deal was found by Cheapflights users on 7/7. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:57 am
ISP
- LAS
1 stop13h 47m
Frontier
Deal found 7/7![Frontier logo]()
$160
This Booking.com deal was found by Cheapflights users on 7/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:13 pm
ISP
- LAX
1 stop29h 35m
Frontier
Deal found 7/6![Frontier logo]()
$166
This Southwest deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 8/314:05 pm
ISP
- SAN
1 stop9h 40m
Southwest
Deal found 7/3![Southwest logo]()
$169
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” 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 7/1710:57 am
ISP
- LAX
1 stop10h 00m
Frontier
Deal found 7/3![Frontier logo]()
$174
This Frontier deal was found by Cheapflights users on 7/7. 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 Frontier 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 7/7![Frontier logo]()
$175
This Frontier deal was found by Cheapflights users on 7/6. 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.
Tue 9/810:57 am
ISP
- LAX
1 stop10h 15m
Frontier
Deal found 7/6![Frontier logo]()
$176
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 July 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $264 (Southwest) |
One-way from | $150 (Southwest) |
Popular in | June |
Cheapest in | January |
Average price | $369 |
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 July 8, 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
Tue 8/25
12:55 pm-6:55 pm
2 stops9h 00m
San Diego
Tue 9/1
10:40 pm-10:15 am
1 stop8h 35m
$270
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Tue 8/25
6:05 am-11:35 am
1 stop8h 30m
San Francisco
Tue 9/29
10:30 pm-10:15 am
1 stop8h 45m
$300
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Tue 8/25
6:05 am-11:35 am
1 stop8h 30m
San Francisco
Thu 10/1
8:40 am-11:35 pm
2 stops11h 55m
$306
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Tue 8/25
6:05 am-11:35 am
1 stop8h 30m
San Francisco
Wed 9/30
10:30 pm-2:30 pm
1 stop13h 00m
$306
IslipLos Angeles
ISP - LAX
ISPLAX
Islip Long Island
Thu 10/22
5:40 pm-12:30 am
1 stop9h 50m
Los Angeles
Mon 10/26
11:05 pm-12:10 pm
2 stops10h 05m
$306
IslipSanta Ana
ISP - SNA
ISPSNA
Islip Long Island
Wed 8/19
6:05 am-2:00 pm
2 stops10h 55m
Santa Ana J. Wayne/Orange Cnty
Wed 8/26
7:55 pm-9:40 am
2 stops10h 45m
$311
IslipLos Angeles
ISP - LAX
ISPLAX
Islip Long Island
Wed 9/2
12:55 pm-6:05 pm
1 stop8h 10m
Los Angeles
Tue 9/8
10:55 pm-2:55 pm
1 stop13h 00m
$342
IslipLong Beach
ISP - LGB
ISPLGB
Islip Long Island
Wed 8/19
6:05 am-1:10 pm
2 stops10h 05m
Long Beach Municipal
Wed 8/26
8:00 am-9:05 pm
2 stops10h 05m
$346
IslipSan Francisco
ISP - SFO
ISPSFO
Islip Long Island
Tue 10/13
9:40 am-2:35 pm
1 stop7h 55m
San Francisco
Fri 10/23
9:35 am-11:35 pm
2 stops11h 00m
$347
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Wed 8/12
10:55 am-4:15 pm
1 stop8h 20m
San Diego
Sat 8/15
7:35 am-8:45 pm
1 stop10h 10m
$366
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-SAN
ISP-LAX
ISP-SFO
ISP-ONT
ISP-SNA
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-SAN
ISP-LAX
ISP-SFO
ISP-ONT
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 July 8, 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.
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
7.9
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
7.9
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
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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 July 8, 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 July 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$339 | Average$536 | FlexibilityNo cancel fee | On-time63% |