$174+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ISP
Sep 4 — Sep 111
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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
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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 August 5, 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 August 5, 2026.
This Southwest deal was found by Cheapflights users on 7/30. 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 -
1 stop8h 45m
Sat 8/295:30 am -
1 stop8h 25m
Deal found 7/30![Southwest logo]()
$311
This Southwest deal was found by Cheapflights users on 7/31. 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 -
1 stop8h 10m
Sun 8/306:20 am -
1 stop10h 10m
Deal found 7/31![Southwest logo]()
$445
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 8/2612:22 pm -
1 stop26h 44m
Sun 8/3010:57 am -
2 stops36h 43m
Deal found 7/31![Multiple Airlines logo]()
$462
This Justfly.com deal was found by Cheapflights users on 7/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:24 am -
1 stop9h 58m
Mon 9/147:00 am -
1 stop29h 03m
Deal found 7/30![JetBlue logo]()
$508
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:24 am -
1 stop9h 58m
Mon 9/149:39 am -
2 stops29h 22m
Deal found 7/30![Multiple Airlines logo]()
$600
This Justfly.com deal was found by Cheapflights users on 7/31. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/911:10 pm -
1 stop19h 25m
Mon 10/126:00 am -
1 stop30h 03m
Deal found 7/31![JetBlue logo]()
$612
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 August 5, 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 August 5, 2026.
This Southwest deal was found by Cheapflights users on 8/4. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/69:10 am -
2 stops10h 35m
Sat 9/125:30 am -
1 stop8h 25m
Deal found 8/4![Southwest logo]()
$417
This Justfly.com deal was found by Cheapflights users on 7/31. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/911:10 pm -
1 stop19h 25m
Mon 10/126:00 am -
1 stop30h 03m
Deal found 7/31![JetBlue logo]()
$612
This KAYAK deal was found by Cheapflights users on 8/3. 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.
Thu 11/512:46 pm -
2 stops17h 13m
Sun 11/87:45 pm -
3 stops18h 24m
Deal found 8/3![Breeze Airways logo]()
$724
This FlightHub deal was found by Cheapflights users on 8/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:30 am -
1 stop32h 05m
Mon 10/129:39 am -
2 stops29h 22m
Deal found 8/4![Multiple Airlines logo]()
$739
This Southwest deal was found by Cheapflights users on 7/31. 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 -
1 stop8h 10m
Sun 8/306:20 am -
1 stop10h 10m
Deal found 7/31![Southwest logo]()
$445
This KAYAK deal was found by Cheapflights users on 8/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2812:18 pm -
2 stops22h 15m
Mon 8/318:43 pm -
2 stops18h 19m
Deal found 8/4![Breeze Airways logo]()
$759
This KAYAK deal was found by Cheapflights users on 8/2. 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 10/312:36 pm -
1 stop27h 15m
Mon 10/129:39 am -
2 stops29h 22m
Deal found 8/2![Breeze Airways logo]()
$789
This KAYAK deal was found by Cheapflights users on 8/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:47 pm -
2 stops21h 46m
Fri 8/288:43 pm -
2 stops17h 54m
Deal found 8/4![Breeze Airways logo]()
$799
Last-minute flights from San Francisco to IslipDiscover last-minute flight deals from San Francisco to Islip. Data last updated August 5, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Islip. Data last updated August 5, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/30. 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 -
1 stop8h 45m
Sat 8/295:30 am -
1 stop8h 25m
Deal found 7/30![Southwest logo]()
$311
This Southwest deal was found by Cheapflights users on 7/31. 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 -
1 stop8h 10m
Sun 8/306:20 am -
1 stop10h 10m
Deal found 7/31![Southwest logo]()
$445
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 8/2612:22 pm -
1 stop26h 44m
Sun 8/3010:57 am -
2 stops36h 43m
Deal found 7/31![Multiple Airlines logo]()
$462
This KAYAK deal was found by Cheapflights users on 8/2. 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 8/2812:18 pm -
2 stops22h 15m
Sat 9/52:33 pm -
2 stops24h 29m
Deal found 8/2![Breeze Airways logo]()
$739
This Justfly.com deal was found by Cheapflights users on 7/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:24 am -
1 stop9h 58m
Mon 9/147:00 am -
1 stop29h 03m
Deal found 7/30![JetBlue logo]()
$508
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:24 am -
1 stop9h 58m
Mon 9/149:39 am -
2 stops29h 22m
Deal found 7/30![Multiple Airlines logo]()
$600
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 August 5, 2026.
Search for one-way flight options from San Francisco to Islip. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
This Southwest deal was found by Cheapflights users on 8/1. 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 -
1 stop8h 10m
Deal found 8/1![Southwest logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Mon 10/127:30 pm -
2 stops40h 33m
Deal found 8/1![Frontier logo]()
$198
This Southwest deal was found by Cheapflights users on 8/1. 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 -
1 stop8h 10m
Deal found 8/1![Southwest logo]()
$207
This JetBlue deal was found by Cheapflights users on 8/3. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1510:24 am -
1 stop9h 58m
Deal found 8/3![JetBlue logo]()
$214
This JetBlue deal was found by Cheapflights users on 8/4. 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.
Wed 9/1610:24 am -
1 stop9h 58m
Deal found 8/4![JetBlue logo]()
$219
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Mon 10/1210:48 pm -
3 stops33h 32m
Deal found 8/1![Multiple Airlines logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Mon 8/1712:29 am -
2 stops13h 18m
Deal found 8/1![Multiple Airlines logo]()
$237
This Southwest deal was found by Cheapflights users on 8/1. 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 10/129:35 pm -
1 stop11h 35m
Deal found 8/1![Southwest logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 8/268:23 pm -
3 stops19h 46m
Deal found 8/1![Multiple Airlines logo]()
$290
This Southwest deal was found by Cheapflights users on 8/1. 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 8/1810:30 pm -
1 stop8h 45m
Deal found 8/1![Southwest logo]()
$299
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 August 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $311 (Southwest) |
One-way from | $174 (Southwest) |
Popular in | June |
Cheapest in | January |
Average price | $445 |
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 August 5, 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
Sun 9/6
9:10 am-10:45 pm
2 stops10h 35m
Islip Long Island
Sat 9/12
5:30 am-10:55 am
1 stop8h 25m
$417
Quickest round-trip
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Wed 8/26
10:30 pm-9:40 am
1 stop8h 10m
Islip Long Island
Sun 8/30
6:20 am-1:30 pm
1 stop10h 10m
$445
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Fri 10/9
11:10 pm-9:35 pm
1 stop19h 25m
Islip Long Island
Mon 10/12
6:00 am-9:03 am
1 stop30h 03m
$612
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Thu 11/5
12:46 pm-8:59 am
2 stops17h 13m
Islip Long Island
Sun 11/8
7:45 pm-11:09 am
3 stops18h 24m
$724
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Fri 10/9
10:30 am-9:35 pm
1 stop32h 05m
Islip Long Island
Mon 10/12
9:39 am-12:01 pm
2 stops29h 22m
$739
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Fri 8/28
12:18 pm-1:33 pm
2 stops22h 15m
Islip Long Island
Mon 8/31
8:43 pm-12:02 pm
2 stops18h 19m
$759
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Sat 10/3
12:36 pm-6:51 pm
1 stop27h 15m
Islip Long Island
Mon 10/12
9:39 am-12:01 pm
2 stops29h 22m
$789
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Tue 8/18
12:47 pm-1:33 pm
2 stops21h 46m
Islip Long Island
Fri 8/28
8:43 pm-11:37 am
2 stops17h 54m
$799
Cheapest one-way
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Fri 9/18
6:04 am-4:58 pm
2 stops31h 54m
$211
San FranciscoIslip
SFO - ISP
SFOISP
San Francisco
Thu 8/27
7:55 pm-9:40 am
2 stops10h 45m
$212
Showing 1-10 of 17 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 August.
| 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 August 5, 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.
Food
7.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
8.0
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.
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Other flights to Islip
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Popular flight searches
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 August 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$398 | Average$486 | FlexibilityNo cancel fee | On-time63% |