$156+ Cheap flights from San Francisco to Islip, NY (SFO - ISP)
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.
SFO — ISP
Aug 28 — Sep 41
Round-trip
1 adult, Economy
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Find cheap flights from San Francisco to Islip 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 San Francisco to Islip
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Best
Last-minute
One-way
Cheapest flights from San Francisco to IslipExplore the most affordable flight options available from San Francisco to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2026.
Explore the most affordable flight options available from San Francisco to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2026.
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2510:30 pm
SFO
- ISP
1 stop8h 45m
Southwest
Tue 9/16:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Deal found 7/26![Southwest logo]()
$311
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/309:35 pm
SFO
- ISP
1 stop11h 20m
Southwest
Wed 11/186:00 am
ISP
- SFO
1 stop10h 50m
Southwest
Deal found 7/27![Southwest logo]()
$321
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:30 pm
SFO
- ISP
1 stop8h 10m
Southwest
Wed 8/266:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Deal found 7/27![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:30 pm
SFO
- ISP
1 stop8h 45m
Southwest
Fri 9/44:05 pm
ISP
- SFO
2 stops9h 50m
Southwest
Deal found 7/28![Southwest logo]()
$409
This Southwest deal was found by Cheapflights users on 7/24. 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.
Sun 10/259:35 pm
SFO
- ISP
1 stop13h 55m
Southwest
Fri 10/306:00 am
ISP
- SFO
1 stop11h 35m
Southwest
Deal found 7/24![Southwest logo]()
$410
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:35 pm
SFO
- ISP
1 stop13h 55m
Southwest
Sun 10/411:00 am
ISP
- SFO
2 stops12h 20m
Southwest
Deal found 7/28![Southwest logo]()
$415
Best flights from San Francisco to IslipDiscover carefully curated flight deals from San Francisco to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2026.
Discover carefully curated flight deals from San Francisco to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2026.
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2510:30 pm
SFO
- ISP
1 stop8h 45m
Southwest
Tue 9/16:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Deal found 7/26![Southwest logo]()
$311
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/309:35 pm
SFO
- ISP
1 stop11h 20m
Southwest
Wed 11/186:00 am
ISP
- SFO
1 stop10h 50m
Southwest
Deal found 7/27![Southwest logo]()
$321
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:30 pm
SFO
- ISP
1 stop8h 10m
Southwest
Wed 8/266:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Deal found 7/27![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 7/24. 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.
Sun 10/2510:35 am
SFO
- ISP
2 stops10h 00m
Southwest
Fri 10/306:00 am
ISP
- SFO
2 stops9h 30m
Southwest
Deal found 7/24![Southwest logo]()
$409
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:35 am
SFO
- ISP
2 stops11h 30m
Southwest
Fri 9/44:05 pm
ISP
- SFO
2 stops9h 50m
Southwest
Deal found 7/28![Southwest logo]()
$414
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/19:35 pm
SFO
- ISP
1 stop13h 55m
Southwest
Sun 10/411:00 am
ISP
- SFO
2 stops12h 20m
Southwest
Deal found 7/28![Southwest logo]()
$415
Last-minute flights from San Francisco to IslipDiscover last-minute flight deals from San Francisco to Islip. Data last updated July 29, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Islip. Data last updated July 29, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:30 pm
SFO
- ISP
1 stop8h 10m
Southwest
Wed 8/266:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Deal found 7/27![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 7/24. 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 8/1910:30 pm
SFO
- ISP
1 stop8h 10m
Southwest
Sat 8/225:30 am
ISP
- SFO
1 stop8h 25m
Southwest
Deal found 7/24![Southwest logo]()
$481
This Southwest deal was found by Cheapflights users on 7/24. 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.
Sun 8/2311:05 pm
SFO
- ISP
2 stops10h 30m
Southwest
Sun 8/306:20 am
ISP
- SFO
1 stop10h 10m
Southwest
Deal found 7/24![Southwest logo]()
$492
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2510:30 pm
SFO
- ISP
1 stop8h 45m
Southwest
Tue 9/16:05 am
ISP
- SFO
1 stop8h 30m
Southwest
Deal found 7/26![Southwest logo]()
$311
One-way flights from San Francisco to IslipSearch for one-way flight options from San Francisco to Islip. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
Search for one-way flight options from San Francisco to Islip. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2510:30 pm
SFO
- ISP
1 stop8h 45m
Southwest
Deal found 7/26![Southwest logo]()
$156
This Southwest deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1111:40 pm
SFO
- ISP
2 stops11h 50m
Southwest
Deal found 7/26![Southwest logo]()
$166
This JetBlue deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:24 am
SFO
- ISP
1 stop9h 58m
JetBlue
Deal found 7/28![JetBlue logo]()
$206
This Southwest deal was found by Cheapflights users on 7/25. 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 8/2710:30 pm
SFO
- ISP
1 stop8h 10m
Southwest
Deal found 7/25![Southwest logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:35 pm
SFO
- ISP
3 stops16h 58m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:05 pm
SFO
- ISP
3 stops33h 23m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$237
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2610:30 pm
SFO
- ISP
1 stop8h 10m
Southwest
Deal found 7/27![Southwest logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/278:56 pm
SFO
- ISP
3 stops37h 37m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:34 am
SFO
- ISP
3 stops23h 46m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$251
Find flight deals from San Francisco to Islip
Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Islip (ISP). 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 July 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $311 (Southwest) |
One-way from | $156 (Southwest) |
Popular in | June |
Cheapest in | January |
Average price | $519 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Francisco to Islip 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 29, 2026.
Use the filters below to find and compare flights from San Francisco to Islip that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Tue 8/25
10:30 pm-10:15 am
1 stop8h 45m
Islip Long Island
Tue 9/1
6:05 am-11:35 am
1 stop8h 30m
$311
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Fri 10/30
9:35 pm-11:55 am
1 stop11h 20m
Islip Long Island
Wed 11/18
6:00 am-1:50 pm
1 stop10h 50m
$321
Quickest round-trip
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Wed 8/19
10:30 pm-9:40 am
1 stop8h 10m
Islip Long Island
Wed 8/26
6:05 am-11:35 am
1 stop8h 30m
$362
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Sun 10/25
10:35 am-11:35 pm
2 stops10h 00m
Islip Long Island
Fri 10/30
6:00 am-12:30 pm
2 stops9h 30m
$409
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Tue 9/1
6:35 am-9:05 pm
2 stops11h 30m
Islip Long Island
Fri 9/4
4:05 pm-10:55 pm
2 stops9h 50m
$414
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Thu 10/1
9:35 pm-2:30 pm
1 stop13h 55m
Islip Long Island
Sun 10/4
11:00 am-8:20 pm
2 stops12h 20m
$415
Cheapest one-way
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Tue 9/1
10:30 pm-10:15 am
1 stop8h 45m
$156
Quickest one-way
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Wed 9/9
10:30 pm-9:40 am
1 stop8h 10m
$156
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Tue 9/15
10:30 pm-10:15 am
1 stop8h 45m
$156
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Tue 8/25
10:30 pm-10:15 am
1 stop8h 45m
$156
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from San Francisco to Islip
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 San Francisco to Islip in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Francisco-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Islip, New York flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Francisco-Islip, New York 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 San Francisco-Islip, New York 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 San Francisco to Islip
Have a flexible travel schedule? Discover the best time to fly to Islip from San Francisco with our price prediction graph.
SFO-ISP
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 Islip
Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated July 29, 2026.
Peruse reviews from past customers who have flown with Southwest from San Francisco to Islip 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.
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Comfort
8.0
Overall
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from San Francisco to Islip. 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 Islip?
Book flights to Islip if you plan to visit one of these locationsRiverhead
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Other flights to Islip
Explore flights to Islip departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 29, 2026.
San Francisco and Islip flights
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Browse through other flights departing from San Francisco. Flights are based on user searches made on Cheapflights and were last updated on July 29, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top airline flying from San Francisco to Islip
Discover the top airline that operate flights from San Francisco to Islip. 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 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$318 | Average$486 | FlexibilityNo cancel fee | On-time63% |