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$154+ Cheap flights from Islip, NY to San Francisco (ISP - SFO)

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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SFO
dic. 5 — dic. 121
vie. 12/5
vie. 12/12
1 adult, Economy
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Cheap 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 noviembre 5, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$444
(Southwest)

One-way from

$154
(JetBlue)

Popular in

December

Cheapest in

February

Average price

$422
Provider with most accurate pricing for Islip Long Island-San Francisco flight deals.
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Provider most trusted by Cheapflights users for Islip Long Island-San Francisco flights.
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From Islip Long Island to San Francisco
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One-way flight from Islip Long Island to San Francisco
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Highest demand for flights based on searches. 8% potential increase in price ($35 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Islip to San Francisco

Cheapest flights from Islip to San Francisco
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 noviembre 5, 2025.

This Southwest deal was found by Cheapflights users on 11/5. 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.
jue. 12/1810:55 amISP - SFO
1 stop10h 25mSouthwest
dom. 12/287:00 pmSFO - ISP
2 stops13h 55mSouthwest
Deal found 11/5$444
This JetBlue deal was found by Cheapflights users on 11/4. 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.
vie. 11/141:55 pmISP - SFO
1 stop12h 36mJetBlue
lun. 11/179:44 pmSFO - ISP
1 stop11h 34mJetBlue
Deal found 11/4$494
This JetBlue deal was found by Cheapflights users on 11/5. 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.
sáb. 11/151:50 pmISP - SFO
1 stop12h 41mJetBlue
vie. 12/59:44 pmSFO - ISP
1 stop10h 21mJetBlue
Deal found 11/5$498
This JetBlue deal was found by Cheapflights users on 11/4. 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.
sáb. 11/2212:09 pmISP - SFO
1 stop14h 14mJetBlue
mar. 12/29:44 pmSFO - ISP
1 stop10h 21mJetBlue
Deal found 11/4$509
This JetBlue deal was found by Cheapflights users on 11/4. 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.
mié. 11/121:15 pmISP - SFO
1 stop13h 16mJetBlue
dom. 11/169:44 pmSFO - ISP
1 stop12h 07mJetBlue
Deal found 11/4$670
This Priceline deal was found by Cheapflights users on 11/4. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/191:15 pmISP - SFO
1 stop13h 16mJetBlue
dom. 11/2311:00 pmSFO - ISP
1 stop13h 14mJetBlue
Deal found 11/4$745
This Southwest deal was found by Cheapflights users on 11/4. 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.
vie. 11/1411:05 amISP - SFO
1 stop10h 15mSouthwest
vie. 11/217:45 amSFO - ISP
2 stops13h 05mSouthwest
Deal found 11/4$833
This JetBlue deal was found by Cheapflights users on 11/4. 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.
sáb. 11/2212:09 pmISP - SFO
1 stop12h 36mJetBlue
lun. 12/111:00 pmSFO - ISP
1 stop9h 05mJetBlue
Deal found 11/4$866

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 2,558,603 searches. Data last updated noviembre 5, 2025.
Use the filters below to find and compare flights from Islip to San Francisco that are best for you.

Fly from

Islip

Fly to

San Francisco

Route

Depart

Return

Price

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

jue. 12/18

10:55 am-6:20 pm

1 stop10h 25m

San Francisco

dom. 12/28

7:00 pm-11:55 am

2 stops13h 55m

$444

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

sáb. 11/15

1:50 pm-11:31 pm

1 stop12h 41m

San Francisco

vie. 12/5

9:44 pm-11:05 am

1 stop10h 21m

$498

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

sáb. 11/22

12:09 pm-11:23 pm

1 stop14h 14m

San Francisco

mar. 12/2

9:44 pm-11:05 am

1 stop10h 21m

$509

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

mié. 11/19

1:15 pm-11:31 pm

1 stop13h 16m

San Francisco

dom. 11/23

11:00 pm-3:14 pm

1 stop13h 14m

$745

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

sáb. 11/22

12:09 pm-9:45 pm

1 stop12h 36m

San Francisco

lun. 12/1

11:00 pm-11:05 am

1 stop9h 05m

$866

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

jue. 11/20

7:36 pm-12:02 pm

3 stops19h 26m

San Francisco

lun. 11/24

12:47 pm-6:56 pm

3 stops27h 09m

$1,028

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

jue. 11/20

12:40 pm-10:50 pm

1 stop13h 10m

San Francisco

lun. 11/24

5:59 pm-11:04 am

2 stops14h 05m

$1,218

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

mar. 1/20

12:25 pm-11:30 pm

1 stop14h 05m

$154

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

mar. 1/13

12:25 pm-11:30 pm

1 stop14h 05m

$154

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

lun. 1/12

12:25 pm-11:30 pm

1 stop14h 05m

$154

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 18 results
1
2

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-San Francisco flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-San Francisco flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.
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.

Cheapflights Insights

Everything you need to know about your flight from Islip to San Francisco

What is the cheapest month to book a flight from Islip, New York to San Francisco?

Currently, February is the cheapest month in which you can book a flight from Islip, New York to San Francisco (average of $71). Flying from Islip, New York to San Francisco in July is currently the most expensive (average of $190). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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.

  • How long is the flight from Islip, New York to San Francisco?

    A quick flight from Islip, New York to San Francisco can take about 10h 25m. Southwest provides one of the quickest options available for as low as $444. The distance from Islip, New York to San Francisco is about 2611 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Islip to San Francisco that include hotel bookings?

    Yes. In addition to deals on Islip to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to San Francisco.

  • Can I find deals for business class flights from Islip to San Francisco?

    Yes. Cheapflights offers flight deals from Islip to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to San Francisco?

    Currently, February is the cheapest month in which you can book a flight from Islip, New York to San Francisco (average of $71). Flying from Islip, New York to San Francisco in July is currently the most expensive (average of $190). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
South San Francisco
Santa Cruz
Livermore
Turlock
Manteca
Watsonville
Sunnyvale
Santa Clara
Vallejo
Hollister
San Bruno
Foster City
Redwood City
Union City
Burlingame
Lodi
San Mateo
Vacaville
Lathrop

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