$132+ Cheap flights from Islip, NY to San Diego (ISP - SAN)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SAN
Jul 14 — Jul 211
Round-trip
1 adult, Economy
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Find cheap flights from Islip to San Diego with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to San Diego
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Best
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One-way
Cheapest flights from Islip to San DiegoExplore the most affordable flight options available from Islip to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 14, 2026.
Explore the most affordable flight options available from Islip to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 14, 2026.
This Southwest deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 8/53:20 pm
ISP
- SAN
2 stops10h 15m
Southwest
Thu 8/1310:40 pm
SAN
- ISP
1 stop8h 00m
Southwest
Deal found 6/13![Southwest logo]()
$356
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/269:55 pm
SAN
- ISP
1 stop9h 35m
Southwest
Deal found 6/14![Southwest logo]()
$414
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 9/184:05 pm
ISP
- SAN
1 stop9h 40m
Southwest
Sun 9/2010:40 pm
SAN
- ISP
1 stop8h 00m
Southwest
Deal found 6/14![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/106:00 am
ISP
- SAN
1 stop8h 45m
Southwest
Thu 7/168:05 pm
SAN
- ISP
2 stops9h 15m
Southwest
Deal found 6/11![Southwest logo]()
$508
Best flights from Islip to San DiegoDiscover carefully curated flight deals from Islip to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 14, 2026.
Discover carefully curated flight deals from Islip to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 14, 2026.
This Southwest deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 8/53:20 pm
ISP
- SAN
2 stops10h 15m
Southwest
Thu 8/1310:40 pm
SAN
- ISP
1 stop8h 00m
Southwest
Deal found 6/13![Southwest logo]()
$356
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/269:55 pm
SAN
- ISP
1 stop9h 35m
Southwest
Deal found 6/14![Southwest logo]()
$414
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 9/184:05 pm
ISP
- SAN
1 stop9h 40m
Southwest
Sun 9/2010:40 pm
SAN
- ISP
1 stop8h 00m
Southwest
Deal found 6/14![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/103:05 pm
ISP
- SAN
2 stops10h 25m
Southwest
Thu 7/167:40 pm
SAN
- ISP
2 stops9h 40m
Southwest
Deal found 6/11![Southwest logo]()
$513
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/255:50 pm
ISP
- SAN
1 stop8h 30m
Southwest
Mon 6/299:40 pm
SAN
- ISP
1 stop7h 25m
Southwest
Deal found 6/10![Southwest logo]()
$614
Last-minute flights from Islip to San DiegoDiscover last-minute flight deals from Islip to San Diego. Data last updated June 14, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to San Diego. Data last updated June 14, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/255:50 pm
ISP
- SAN
1 stop8h 30m
Southwest
Mon 6/299:40 pm
SAN
- ISP
1 stop7h 25m
Southwest
Deal found 6/10![Southwest logo]()
$614
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/106:00 am
ISP
- SAN
1 stop8h 45m
Southwest
Thu 7/168:05 pm
SAN
- ISP
2 stops9h 15m
Southwest
Deal found 6/11![Southwest logo]()
$508
This KAYAK deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/132:28 pm
ISP
- SAN
1 stop24h 41m
Breeze Airways
Mon 7/201:05 pm
SAN
- ISP
1 stop19h 11m
Breeze Airways
Deal found 6/10![Breeze Airways logo]()
$1,018
This KAYAK deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1411:56 am
ISP
- SAN
1 stop27h 37m
Breeze Airways
Tue 7/2112:54 pm
SAN
- ISP
1 stop19h 23m
Breeze Airways
Deal found 6/10![Breeze Airways logo]()
$858
This KAYAK deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/167:49 pm
ISP
- SAN
1 stop19h 31m
Breeze Airways
Sun 7/1912:09 pm
SAN
- ISP
1 stop22h 19m
Breeze Airways
Deal found 6/11![Breeze Airways logo]()
$978
This Southwest deal was found by Cheapflights users on 6/14. Clicking the “Pick Dates” 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 7/269:55 pm
SAN
- ISP
1 stop9h 35m
Southwest
Deal found 6/14![Southwest logo]()
$414
One-way flights from Islip to San DiegoSearch for one-way flight options from Islip to San Diego. Find affordable one-way fares based on user searches. Data last updated June 14, 2026.
Search for one-way flight options from Islip to San Diego. Find affordable one-way fares based on user searches. Data last updated June 14, 2026.
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 9/2210:55 am
ISP
- SAN
1 stop8h 20m
Southwest
Deal found 6/11![Southwest logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1511:57 am
ISP
- SAN
1 stop26h 27m
Breeze Airways
Deal found 6/13![Breeze Airways logo]()
$230
This Southwest deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” 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 8/1511:55 am
ISP
- SAN
2 stops11h 25m
Southwest
Deal found 6/13![Southwest logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:00 pm
ISP
- SAN
3 stops30h 41m
Multiple Airlines
Deal found 6/11![Multiple Airlines logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 6/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1511:57 am
ISP
- SAN
3 stops30h 46m
Multiple Airlines
Deal found 6/13![Multiple Airlines logo]()
$316
This KAYAK deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Sat 8/2911:57 am
ISP
- SAN
1 stop26h 27m
Breeze Airways
Deal found 6/12![Breeze Airways logo]()
$350
This KAYAK deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1911:57 am
ISP
- SAN
1 stop26h 27m
Breeze Airways
Deal found 6/10![Breeze Airways logo]()
$390
This KAYAK deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/172:28 pm
ISP
- SAN
1 stop24h 41m
Breeze Airways
Deal found 6/10![Breeze Airways logo]()
$400
This KAYAK deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/411:57 am
ISP
- SAN
1 stop26h 27m
Breeze Airways
Deal found 6/10![Breeze Airways logo]()
$410
This KAYAK deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:49 pm
ISP
- SAN
1 stop19h 31m
Breeze Airways
Deal found 6/10![Breeze Airways logo]()
$420
This KAYAK deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/811:57 am
ISP
- SAN
1 stop26h 27m
Breeze Airways
Deal found 6/10![Breeze Airways logo]()
$440
Find flight deals from Islip to San Diego
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $356 (Southwest) |
One-way from | $132 (Southwest) |
Popular in | December |
Cheapest in | September |
Average price | $451 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to San Diego 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 14, 2026.
Use the filters below to find and compare flights from Islip to San Diego that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Wed 8/5
3:20 pm-10:35 pm
2 stops10h 15m
San Diego
Thu 8/13
10:40 pm-9:40 am
1 stop8h 00m
$356
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Tue 7/21
6:00 am-1:45 pm
2 stops10h 45m
San Diego
Sun 7/26
9:55 pm-10:30 am
1 stop9h 35m
$414
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Fri 9/18
4:05 pm-10:45 pm
1 stop9h 40m
San Diego
Sun 9/20
10:40 pm-9:40 am
1 stop8h 00m
$467
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Fri 7/10
3:05 pm-10:30 pm
2 stops10h 25m
San Diego
Thu 7/16
7:40 pm-8:20 am
2 stops9h 40m
$513
Quickest round-trip
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Thu 6/25
5:50 pm-11:20 pm
1 stop8h 30m
San Diego
Mon 6/29
9:40 pm-8:05 am
1 stop7h 25m
$614
Cheapest one-way
Quickest one-way
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Tue 9/22
10:55 am-4:15 pm
1 stop8h 20m
$132
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Sat 8/15
11:55 am-8:20 pm
2 stops11h 25m
$249
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Sat 8/29
11:57 am-11:24 am
1 stop26h 27m
$350
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Mon 8/24
2:28 pm-12:09 pm
1 stop24h 41m
$400
IslipSan Diego
ISP - SAN
ISPSAN
Islip Long Island
Sat 7/4
11:57 am-11:24 am
1 stop26h 27m
$410
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Islip to San Diego
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to San Diego in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Islip, New York-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-San Diego flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Islip, New York-San Diego flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Islip to San Diego
Have a flexible travel schedule? Discover the best time to fly to San Diego from Islip with our price prediction graph.
ISP-SAN
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.
Reviews of airlines servicing San Diego
Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated June 14, 2026.
Peruse reviews from past customers who have flown with Southwest from Islip to San Diego to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
7.9
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
7.9
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 San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Diego?
Book flights to San Diego if you plan to visit one of these locationsEl Cajon
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Islip and San Diego flights
Browse other Islip and San Diego flight options. Last updated on June 14, 2026.
Other flights from Islip
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Popular flight searches
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Top airline flying from Islip to San Diego
Discover the top airline that operate flights from Islip to San Diego. 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 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$350 | Average$558 | FlexibilityNo cancel fee | On-time63% |