$188+ Cheap flights from San Francisco to Islip, NY (SFO - ISP)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ISP
Nov 29 — Dec 61
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
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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 October 30, 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 October 30, 2026.
This Southwest deal was found by Cheapflights users on 10/28. 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.
Wed 12/167:15 am -
2 stops11h 30m
Mon 12/214:55 pm -
2 stops11h 25m
Deal found 10/28![Southwest logo]()
$446
This Southwest deal was found by Cheapflights users on 10/28. 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 12/178:00 am -
2 stops12h 35m
Mon 12/214:55 pm -
2 stops11h 25m
Deal found 10/28![Southwest logo]()
$483
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/239:11 pm -
2 stops15h 34m
Thu 12/32:17 pm -
2 stops13h 31m
Deal found 10/27![Frontier logo]()
$546
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/269:11 pm -
2 stops15h 34m
Thu 12/32:17 pm -
2 stops13h 31m
Deal found 10/27![Frontier logo]()
$572
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/192:21 pm -
2 stops22h 24m
Mon 11/234:40 pm -
2 stops19h 21m
Deal found 10/28![Frontier logo]()
$588
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1810:20 pm -
2 stops16h 11m
Mon 11/234:40 pm -
2 stops19h 21m
Deal found 10/27![Frontier logo]()
$605
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1711:23 am -
2 stops20h 08m
Mon 12/2110:44 am -
3 stops16h 51m
Deal found 10/28![Multiple Airlines logo]()
$624
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 October 30, 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 October 30, 2026.
This Southwest deal was found by Cheapflights users on 10/28. 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.
Wed 12/167:15 am -
2 stops11h 30m
Mon 12/214:55 pm -
2 stops11h 25m
Deal found 10/28![Southwest logo]()
$446
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/156:30 pm -
2 stops13h 34m
Fri 2/1911:59 am -
2 stops15h 36m
Deal found 10/28![Frontier logo]()
$828
This Southwest deal was found by Cheapflights users on 10/28. 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 12/178:00 am -
2 stops12h 35m
Mon 12/214:55 pm -
2 stops11h 25m
Deal found 10/28![Southwest logo]()
$483
This Southwest deal was found by Cheapflights users on 10/27. 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.
Thu 11/1210:10 am -
2 stops10h 25m
Tue 12/16:05 am -
2 stops12h 45m
Deal found 10/27![Southwest logo]()
$647
This Southwest deal was found by Cheapflights users on 10/27. 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 12/239:25 pm -
1 stop11h 20m
Sun 1/34:55 pm -
2 stops10h 35m
Deal found 10/27![Southwest logo]()
$654
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/249:30 am -
2 stops11h 20m
Tue 12/16:05 am -
2 stops11h 50m
Deal found 10/25![Southwest logo]()
$855
Last-minute flights from San Francisco to IslipDiscover last-minute flight deals from San Francisco to Islip. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from San Francisco to Islip. Data last updated October 30, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1110:20 pm -
2 stops16h 11m
Thu 12/32:17 pm -
2 stops13h 31m
Deal found 10/27![Frontier logo]()
$655
This Southwest deal was found by Cheapflights users on 10/27. 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.
Thu 11/1210:10 am -
2 stops10h 25m
Tue 12/16:05 am -
2 stops12h 45m
Deal found 10/27![Southwest logo]()
$647
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1810:20 pm -
2 stops16h 11m
Mon 11/234:40 pm -
2 stops19h 21m
Deal found 10/27![Frontier logo]()
$605
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/192:21 pm -
2 stops22h 24m
Mon 11/234:40 pm -
2 stops19h 21m
Deal found 10/28![Frontier logo]()
$588
This Frontier deal was found by Cheapflights users on 10/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/192:21 pm -
2 stops22h 24m
Thu 12/32:17 pm -
2 stops13h 31m
Deal found 10/26![Frontier logo]()
$638
This Frontier deal was found by Cheapflights users on 10/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2211:26 pm -
2 stops13h 19m
Thu 12/32:17 pm -
2 stops13h 31m
Deal found 10/26![Frontier logo]()
$653
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/239:11 pm -
2 stops15h 34m
Thu 12/32:17 pm -
2 stops13h 31m
Deal found 10/27![Frontier logo]()
$546
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/249:23 pm -
2 stops15h 22m
Thu 12/32:17 pm -
2 stops13h 31m
Deal found 10/27![Frontier logo]()
$664
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/269:11 pm -
2 stops15h 34m
Thu 12/32:17 pm -
2 stops13h 31m
Deal found 10/27![Frontier logo]()
$572
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 October 30, 2026.
Search for one-way flight options from San Francisco to Islip. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 12/19:31 pm -
3 stops33h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$188
This Southwest deal was found by Cheapflights users on 10/29. 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 12/19:25 pm -
1 stop11h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Southwest logo]()
$242
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:30 pm -
2 stops18h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$266
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/78:00 am -
1 stop11h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![JetBlue logo]()
$297
This Southwest deal was found by Cheapflights users on 10/26. 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 12/189:30 am -
2 stops11h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Southwest logo]()
$300
This Frontier deal was found by Cheapflights users on 10/29. 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 2/106:30 pm -
2 stops13h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$302
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/224:11 pm -
2 stops15h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$307
This Southwest deal was found by Cheapflights users on 10/27. 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.
Sun 12/2710:45 pm -
2 stops9h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Southwest logo]()
$316
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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $446 (Southwest) |
One-way from | $188 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $544 |
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 7,457,451 searches. Data last updated October 30, 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 San Francisco - ISP Islip Long Island
SFOISP
San Francisco
Tue 12/1
9:31 pm-10:17 am
3 stops33h 46m
Islip Long Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$188
San FranciscoIslip
SFO San Francisco - ISP Islip Long Island
SFOISP
San Francisco
Tue 12/1
9:25 pm-11:45 am
1 stop11h 20m
Islip Long Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$242
San FranciscoIslip
SFO San Francisco - ISP Islip Long Island
SFOISP
San Francisco
Mon 12/7
8:00 am-10:04 pm
1 stop11h 04m
Islip Long Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$297
San FranciscoIslip
SFO San Francisco - ISP Islip Long Island
SFOISP
San Francisco
Fri 12/18
9:30 am-11:50 pm
2 stops11h 20m
Islip Long Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$300
Quickest round-trip
San FranciscoIslip
SFO San Francisco - ISP Islip Long Island
SFOISP
San Francisco
Sun 12/27
10:45 pm-11:30 am
2 stops9h 45m
Islip Long Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$316
San FranciscoIslip
SFO San Francisco - ISP Islip Long Island
SFOISP
San Francisco
Fri 2/12
3:30 pm-11:04 am
2 stops16h 34m
Islip Long Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$354
San FranciscoIslip
SFO San Francisco - ISP Islip Long Island
SFOISP
San Francisco
Tue 1/19
8:00 am-9:56 pm
1 stop10h 56m
Islip Long Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$355
San FranciscoIslip
SFO San Francisco - ISP Islip Long Island
SFOISP
San Francisco
Fri 12/18
9:23 pm-7:05 pm
3 stops42h 42m
Islip Long Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$386
San FranciscoIslip
SFO San Francisco - ISP Islip Long Island
SFOISP
San Francisco
Tue 12/1
8:00 am-10:40 pm
1 stop11h 40m
Islip Long Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$395
San FranciscoIslip
SFO San Francisco - ISP Islip Long Island
SFOISP
San Francisco
Thu 11/19
2:21 pm-3:45 pm
2 stops22h 24m
Islip Long Island
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$411
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 October.
| 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 October 30, 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.
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.4
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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San Francisco and Islip flights
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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 7,457,451 searches. Data last updated October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$398 | Average$475 | FlexibilityNo cancel fee | On-time63% |