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San Francisco Bay Area

$157+ Cheap flights from Islip, NY (ISP) to San Francisco Bay Area

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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SFO
Aug 17 — Aug 241
Sun 8/17
Sun 8/24
1 adult, Economy
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Cheap flight deals from Islip to San Francisco Bay Area

Keep the following information in mind while searching for Islip to San Francisco Bay Area flight deals. Data was last updated August 12, 2025.

Round-trip from

$330
(Southwest)

One-way from

$157
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$434
From Islip Long Island to San Francisco Bay Area
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One-way flight from Islip Long Island to San Francisco Bay Area
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Highest demand for flights based on searches. 7% potential increase in price ($34 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Islip to San Francisco Bay Area

Cheapest flights from Islip to San Francisco Bay Area
Explore the most affordable flight options available from Islip to San Francisco Bay Area. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 12, 2025.

This Southwest deal was found by Cheapflights users on 8/11. 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.
Sat 10/411:55 amISP - SFO
1 stop10h 50mSouthwest
Sat 10/119:05 pmSFO - ISP
1 stop12h 05mSouthwest
Deal found 8/11$330
This CheapOair deal was found by Cheapflights users on 8/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/168:37 pmISP - SFO
1 stop16h 48mFrontier
Mon 8/188:53 pmSFO - ISP
1 stop24h 06mFrontier
Deal found 8/12$335
This Southwest deal was found by Cheapflights users on 8/11. 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.
Thu 9/2512:10 pmISP - SFO
1 stop11h 00mSouthwest
Mon 11/39:25 pmSFO - ISP
1 stop11h 50mSouthwest
Deal found 8/11$336
This Southwest deal was found by Cheapflights users on 8/10. 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.
Sat 11/1511:55 amISP - SFO
1 stop11h 10mSouthwest
Thu 11/209:25 amSFO - ISP
2 stops9h 40mSouthwest
Deal found 8/10$381
This FlightHub deal was found by Cheapflights users on 8/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/111:35 amISP - SFO
2 stops38h 27mFrontier
Sat 10/411:00 pmSFO - ISP
2 stops32h 40mFrontier
Deal found 8/11$384
This FlightHub deal was found by Cheapflights users on 8/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2511:40 amISP - SFO
2 stops14h 22mFrontier
Mon 11/39:19 pmSFO - ISP
2 stops34h 18mFrontier
Deal found 8/11$385
This Frontier deal was found by Cheapflights users on 8/11. 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 9/411:45 amISP - SFO
2 stops14h 17mFrontier
Fri 9/51:15 pmSFO - ISP
2 stops18h 40mFrontier
Deal found 8/11$391
This Frontier deal was found by Cheapflights users on 8/11. 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 9/411:45 amISP - SFO
2 stops14h 17mFrontier
Sat 9/62:10 pmSFO - ISP
2 stops17h 40mFrontier
Deal found 8/11$394
This Frontier deal was found by Cheapflights users on 8/11. 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 8/286:05 amISP - SFO
2 stops19h 45mFrontier
Mon 9/810:45 amSFO - ISP
2 stops20h 55mFrontier
Deal found 8/11$396
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/262:19 pmISP - SJC
2 stops11h 19mMultiple Airlines
Sat 10/47:50 pmSJC - ISP
2 stops12h 08mMultiple Airlines
Deal found 8/10$984
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/102:19 pmISP - SJC
2 stops11h 41mMultiple Airlines
Fri 11/147:47 pmSJC - ISP
2 stops12h 11mMultiple Airlines
Deal found 8/10$994
This Southwest deal was found by Cheapflights users on 8/9. 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 8/1212:30 pmISP - SJC
1 stop8h 05mSouthwest
Fri 8/158:55 pmSJC - ISP
1 stop12h 10mSouthwest
Deal found 8/9$1,032

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to San Francisco Bay Area 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 12, 2025.
Use the filters below to find and compare flights from Islip to San Francisco Bay Area that are best for you.

Fly from

Islip

Fly to

San Francisco Bay Area

Route

Depart

Return

Price

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Sat 10/4

11:55 am-7:45 pm

1 stop10h 50m

San Francisco

Sat 10/11

9:05 pm-12:10 pm

1 stop12h 05m

$330

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Sat 8/16

8:37 pm-10:25 am

1 stop16h 48m

San Francisco

Mon 8/18

8:53 pm-11:59 pm

1 stop24h 06m

$335

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 9/25

12:10 pm-8:10 pm

1 stop11h 00m

San Francisco

Mon 11/3

9:25 pm-12:15 pm

1 stop11h 50m

$336

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 10/1

11:35 am-11:02 pm

2 stops38h 27m

San Francisco

Sat 10/4

11:00 pm-10:40 am

2 stops32h 40m

$384

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 9/25

11:40 am-11:02 pm

2 stops14h 22m

San Francisco

Mon 11/3

9:19 pm-10:37 am

2 stops34h 18m

$385

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 9/4

11:45 am-11:02 pm

2 stops14h 17m

San Francisco

Fri 9/5

1:15 pm-10:55 am

2 stops18h 40m

$391

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 9/4

11:45 am-11:02 pm

2 stops14h 17m

San Francisco

Sat 9/6

2:10 pm-10:50 am

2 stops17h 40m

$394

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 8/28

6:05 am-10:50 pm

2 stops19h 45m

San Francisco

Mon 9/8

10:45 am-10:40 am

2 stops20h 55m

$396

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 8/15

8:37 pm-10:25 am

1 stop16h 48m

San Francisco

Mon 8/18

8:53 pm-11:59 pm

1 stop24h 06m

$397

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Fri 9/26

2:19 pm-10:38 pm

2 stops11h 19m

San Jose

Sat 10/4

7:50 pm-10:58 am

2 stops12h 08m

$984

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 36 results
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Best time to book a flight from Islip to San Francisco Bay Area

Have a flexible travel schedule? Discover the best time to fly to San Francisco Bay Area 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 Bay Area

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

Currently, January is the cheapest month in which you can book a flight from Islip, New York to San Francisco Bay Area (average of $276). Flying from Islip, New York to San Francisco Bay Area in June is currently the most expensive (average of $358). 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 Bay Area. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Islip to San Francisco Bay Area?

    Most people fly from Islip Long Island (ISP) if they book a flight from Islip to San Francisco Bay Area. Islip Long Island is conveniently located just 7.2 mi from Islip’s city center.

  • What are the most popular routes from Islip, New York to San Francisco Bay Area?

    Most travelers choose Islip Long Island - San Francisco, Islip Long Island - San Jose or Islip Long Island - Oakland when deciding on the best route from Islip, New York to San Francisco Bay Area.

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

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

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

    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 Bay Area.

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

    Yes. Cheapflights offers flight deals from Islip to San Francisco Bay Area 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 Bay Area?

    Currently, January is the cheapest month in which you can book a flight from Islip, New York to San Francisco Bay Area (average of $276). Flying from Islip, New York to San Francisco Bay Area in June is currently the most expensive (average of $358). 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

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