$193+ Cheap flights from Islip, NY to San Francisco (ISP - SFO)
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 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SFO
Nov 15 — Nov 221
Round-trip
1 adult, Economy
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Find cheap flights from Islip to San Francisco 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 Islip to San Francisco
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Cheapest flights from Islip to San FranciscoExplore the most affordable flight options available from Islip to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 16, 2026.
Explore the most affordable flight options available from Islip to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 16, 2026.
This Southwest deal was found by Cheapflights users on 10/14. 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.
Wed 11/1112:30 pm -
2 stops14h 25m
Wed 11/186:10 am -
2 stops12h 35m
Deal found 10/14![Southwest logo]()
$435
This Southwest deal was found by Cheapflights users on 10/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/312:30 pm -
2 stops14h 25m
Fri 11/611:35 pm -
2 stops12h 20m
Deal found 10/12![Southwest logo]()
$545
This Southwest deal was found by Cheapflights users on 10/10. 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.
Fri 11/612:25 pm -
2 stops13h 20m
Sun 11/159:25 pm -
1 stop11h 20m
Deal found 10/10![Southwest logo]()
$554
This Mytrip deal was found by Cheapflights users on 10/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:55 pm -
2 stops26h 15m
Fri 10/3011:52 pm -
2 stops14h 39m
Deal found 10/11![Frontier logo]()
$609
This Southwest deal was found by Cheapflights users on 10/14. 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.
Thu 10/296:00 am -
2 stops9h 30m
Mon 11/29:40 am -
2 stops10h 50m
Deal found 10/14![Southwest logo]()
$647
Best flights from Islip to San FranciscoDiscover carefully curated flight deals from Islip to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 16, 2026.
Discover carefully curated flight deals from Islip to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 16, 2026.
This Southwest deal was found by Cheapflights users on 10/11. 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 2/165:35 am -
1 stop11h 25m
Mon 2/225:30 am -
2 stops9h 45m
Deal found 10/11![Southwest logo]()
$390
This Southwest deal was found by Cheapflights users on 10/14. 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.
Wed 11/1112:30 pm -
2 stops14h 25m
Wed 11/186:10 am -
2 stops12h 35m
Deal found 10/14![Southwest logo]()
$435
This Southwest deal was found by Cheapflights users on 10/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/312:30 pm -
2 stops14h 25m
Fri 11/611:35 pm -
2 stops12h 20m
Deal found 10/12![Southwest logo]()
$545
This Southwest deal was found by Cheapflights users on 10/10. 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.
Fri 11/612:25 pm -
2 stops13h 20m
Sun 11/159:25 pm -
1 stop11h 20m
Deal found 10/10![Southwest logo]()
$554
This Southwest deal was found by Cheapflights users on 10/14. 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.
Thu 10/296:00 am -
2 stops9h 30m
Mon 11/29:40 am -
2 stops10h 50m
Deal found 10/14![Southwest logo]()
$647
This Southwest deal was found by Cheapflights users on 10/15. 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 10/306:00 am -
1 stop11h 35m
Tue 11/39:25 pm -
1 stop11h 20m
Deal found 10/15![Southwest logo]()
$648
Last-minute flights from Islip to San FranciscoDiscover last-minute flight deals from Islip to San Francisco. Data last updated October 16, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to San Francisco. Data last updated October 16, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 10/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:55 pm -
2 stops26h 15m
Fri 10/3011:52 pm -
2 stops14h 39m
Deal found 10/11![Frontier logo]()
$609
This Southwest deal was found by Cheapflights users on 10/14. 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.
Thu 10/296:00 am -
2 stops9h 30m
Mon 11/29:40 am -
2 stops10h 50m
Deal found 10/14![Southwest logo]()
$647
This Southwest deal was found by Cheapflights users on 10/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/312:30 pm -
2 stops14h 25m
Fri 11/611:35 pm -
2 stops12h 20m
Deal found 10/12![Southwest logo]()
$545
This Southwest deal was found by Cheapflights users on 10/10. 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.
Fri 11/612:25 pm -
2 stops13h 20m
Sun 11/159:25 pm -
1 stop11h 20m
Deal found 10/10![Southwest logo]()
$554
This Southwest deal was found by Cheapflights users on 10/14. 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.
Wed 11/1112:30 pm -
2 stops14h 25m
Wed 11/186:10 am -
2 stops12h 35m
Deal found 10/14![Southwest logo]()
$435
One-way flights from Islip to San FranciscoSearch for one-way flight options from Islip to San Francisco. Find affordable one-way fares based on user searches. Data last updated October 16, 2026.
Search for one-way flight options from Islip to San Francisco. Find affordable one-way fares based on user searches. Data last updated October 16, 2026.
This Southwest deal was found by Cheapflights users on 10/13. 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 12/166:05 am -
1 stop10h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Southwest logo]()
$193
This Frontier deal was found by Cheapflights users on 10/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/62:45 pm -
2 stops21h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![Frontier logo]()
$328
This Frontier deal was found by Cheapflights users on 10/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/189:56 am -
2 stops17h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Frontier logo]()
$337
This Frontier deal was found by Cheapflights users on 10/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/32:44 pm -
2 stops13h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Frontier logo]()
$342
This Frontier deal was found by Cheapflights users on 10/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/234:40 pm -
2 stops19h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Frontier logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 10/11. 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.
Wed 10/2112:00 pm -
2 stops15h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Multiple Airlines logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 10/11. 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.
Thu 10/227:45 pm -
3 stops18h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Breeze Airways logo]()
$351
This Frontier deal was found by Cheapflights users on 10/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/214:43 pm -
2 stops19h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Frontier logo]()
$353
Find flight deals from Islip to San Francisco
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Francisco (SFO). 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 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $390 (Southwest) |
One-way from | $193 (Southwest) |
Popular in | June |
Cheapest in | January |
Average price | $510 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to San Francisco 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 16, 2026.
Use the filters below to find and compare flights from Islip to San Francisco that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
IslipSan Francisco
ISP Islip Long Island - SFO San Francisco
ISPSFO
Islip Long Island
Wed 12/16
6:05 am-1:50 pm
1 stop10h 45m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$193
IslipSan Francisco
ISP Islip Long Island - SFO San Francisco
ISPSFO
Islip Long Island
Mon 11/23
4:40 pm-9:01 am
2 stops19h 21m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$347
IslipSan Francisco
ISP Islip Long Island - SFO San Francisco
ISPSFO
Islip Long Island
Thu 3/18
2:25 pm-11:16 pm
1 stop11h 51m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$389
IslipSan Francisco
ISP Islip Long Island - SFO San Francisco
ISPSFO
Islip Long Island
Tue 2/16
5:35 am-2:00 pm
1 stop11h 25m
San Francisco
Mon 2/22
5:30 am-6:15 pm
2 stops9h 45m
$390
IslipSan Francisco
ISP Islip Long Island - SFO San Francisco
ISPSFO
Islip Long Island
Thu 10/22
6:13 pm-10:37 am
2 stops43h 24m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$392
IslipSan Francisco
ISP Islip Long Island - SFO San Francisco
ISPSFO
Islip Long Island
Sun 11/15
7:45 pm-11:09 am
3 stops18h 24m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$396
IslipSan Francisco
ISP Islip Long Island - SFO San Francisco
ISPSFO
Islip Long Island
Thu 11/12
7:45 pm-11:09 am
3 stops18h 24m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$426
IslipSan Francisco
ISP Islip Long Island - SFO San Francisco
ISPSFO
Islip Long Island
Sun 11/8
7:45 pm-11:09 am
3 stops18h 24m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$426
IslipSan Francisco
ISP Islip Long Island - SFO San Francisco
ISPSFO
Islip Long Island
Wed 11/11
12:30 pm-11:55 pm
2 stops14h 25m
San Francisco
Wed 11/18
6:10 am-9:45 pm
2 stops12h 35m
$435
IslipSan Francisco
ISP Islip Long Island - SFO San Francisco
ISPSFO
Islip Long Island
Thu 10/29
7:45 pm-11:09 am
3 stops18h 24m
San Francisco
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$446
Showing 1-10 of 15 resultsSorted by cheapest first
Compare providers for flights from Islip to San Francisco
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 Francisco in October.
| 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 Francisco 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 Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-San Francisco flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Islip, New York-San Francisco 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 Francisco 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 Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from Islip with our price prediction graph.
ISP-SFO
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.
Related info for your journey
Find useful and relevant information for your journey from Islip to San Francisco. 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 Francisco?
Book flights to San Francisco if you plan to visit one of these locationsSouth San Francisco
Santa Clara
Santa Cruz
Walnut Creek
Hayward
San Bruno
Emeryville
Burlingame
Roseville
Redwood City
Rancho Cordova
Cupertino
Newark
Fairfield
San Ramon
Manteca
San Carlos
Vallejo
Turlock
Davis
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