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San Francisco Bay Area

$188+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SFO
Mar 19 — Mar 261
Thu 3/19
Thu 3/26
1 adult, Economy
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Cheap 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 February 17, 2026.

This Southwest deal was found by Cheapflights users on 2/13. 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.
Mon 3/165:55 pm
ISP
-
SFO
1 stop8h 45m
Southwest
Tue 3/2410:55 pm
SFO
-
ISP
2 stops9h 45m
Southwest
Deal found 2/13$385
This Southwest deal was found by Cheapflights users on 2/13. 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 4/154:10 pm
ISP
-
SFO
1 stop8h 15m
Southwest
Sun 4/1911:25 pm
SFO
-
ISP
2 stops9h 25m
Southwest
Deal found 2/13$412
This Southwest deal was found by Cheapflights users on 2/12. 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.
Fri 4/104:30 pm
ISP
-
SFO
1 stop9h 50m
Southwest
Mon 4/279:15 pm
SFO
-
ISP
1 stop11h 40m
Southwest
Deal found 2/12$425
This Southwest deal was found by Cheapflights users on 2/13. 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.
Tue 6/3012:25 pm
ISP
-
SFO
1 stop10h 25m
Southwest
Wed 7/19:10 pm
SFO
-
ISP
1 stop8h 10m
Southwest
Deal found 2/13$467
This Southwest deal was found by Cheapflights users on 2/13. 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 4/1512:30 pm
ISP
-
OAK
2 stops10h 50m
Southwest
Sun 4/1911:55 pm
OAK
-
ISP
2 stops8h 55m
Southwest
Deal found 2/13$489
This Southwest deal was found by Cheapflights users on 2/13. 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.
Mon 7/612:30 pm
ISP
-
SFO
1 stop8h 00m
Southwest
Wed 7/88:25 am
SFO
-
ISP
2 stops11h 10m
Southwest
Deal found 2/13$508
This Southwest deal was found by Cheapflights users on 2/13. 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.
Sat 2/285:30 am
ISP
-
SFO
1 stop11h 20m
Southwest
Wed 3/47:40 am
SFO
-
ISP
2 stops11h 15m
Southwest
Deal found 2/13$572
This Southwest deal was found by Cheapflights users on 2/15. 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.
Sun 3/15:35 am
ISP
-
SFO
2 stops11h 45m
Southwest
Thu 3/510:55 pm
SFO
-
ISP
2 stops9h 45m
Southwest
Deal found 2/15$577
This Southwest deal was found by Cheapflights users on 2/15. 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.
Sun 3/11:10 pm
ISP
-
SJC
2 stops12h 30m
Southwest
Thu 3/510:10 am
SJC
-
ISP
2 stops10h 45m
Southwest
Deal found 2/15$601
This Southwest deal was found by Cheapflights users on 2/13. 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.
Thu 4/1612:30 pm
ISP
-
OAK
2 stops10h 35m
Southwest
Sun 4/1911:55 pm
OAK
-
ISP
2 stops8h 55m
Southwest
Deal found 2/13$601
This Southwest deal was found by Cheapflights users on 2/13. 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.
Tue 6/306:00 am
ISP
-
SJC
1 stop9h 20m
Southwest
Wed 7/110:55 pm
SJC
-
ISP
2 stops9h 55m
Southwest
Deal found 2/13$677
This Southwest deal was found by Cheapflights users on 2/14. 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 5/144:30 pm
ISP
-
SJC
2 stops10h 25m
Southwest
Thu 5/2111:00 am
SJC
-
ISP
2 stops9h 30m
Southwest
Deal found 2/14$757

Find 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 February 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$385
(Southwest)

One-way from

$188
(JetBlue)

Popular in

December

Cheapest in

January

Average price

$377
Provider with most accurate pricing for New York (NYC)-San Francisco flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-San Francisco flights.
Search Deals
From Islip Long Island to San Francisco Bay Area
Search Deals
One-way flight from Islip Long Island to San Francisco Bay Area
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 17, 2026.
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

Mon 3/16

5:55 pm-11:40 pm

1 stop8h 45m

San Francisco

Tue 3/24

10:55 pm-11:40 am

2 stops9h 45m

$385

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Wed 4/15

4:10 pm-9:25 pm

1 stop8h 15m

San Francisco

Sun 4/19

11:25 pm-11:50 am

2 stops9h 25m

$412

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Thu 4/16

4:30 pm-11:20 pm

1 stop9h 50m

San Francisco

Sun 4/19

11:25 pm-11:50 am

2 stops9h 25m

$425

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 4/17

4:30 pm-11:20 pm

1 stop9h 50m

San Francisco

Mon 4/20

11:25 pm-11:55 am

2 stops9h 30m

$425

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Fri 4/10

4:30 pm-11:20 pm

1 stop9h 50m

San Francisco

Mon 4/27

10:55 pm-11:55 am

2 stops10h 00m

$425

IslipOakland

ISP - OAK

ISPOAK

Islip Long Island

Wed 4/15

12:30 pm-8:20 pm

2 stops10h 50m

Oakland

Sun 4/19

11:55 pm-11:50 am

2 stops8h 55m

$489

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Sun 3/1

1:10 pm-10:40 pm

2 stops12h 30m

San Jose

Thu 3/5

10:10 am-11:55 pm

2 stops10h 45m

$601

IslipOakland

ISP - OAK

ISPOAK

Islip Long Island

Thu 4/16

12:30 pm-8:05 pm

2 stops10h 35m

Oakland

Sun 4/19

11:55 pm-11:50 am

2 stops8h 55m

$601

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Thu 5/14

4:30 pm-11:55 pm

2 stops10h 25m

San Jose

Thu 5/21

11:00 am-11:30 pm

2 stops9h 30m

$757

IslipSan Francisco

ISP - SFO

ISPSFO

Islip Long Island

Tue 3/10

1:25 pm-11:59 pm

1 stop13h 34m

$188

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/16

Showing 1-10 of 22 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, December is the cheapest month in which you can book a flight from Islip, New York to San Francisco Bay Area (average of $113). Flying from Islip, New York to San Francisco Bay Area 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 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.

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

    Airlines like Southwest fly from Islip, New York to San Francisco Bay Area in about 8h 45m. The time it takes to get you to your destination can typically vary by up to . The distance from Islip, New York to San Francisco Bay Area is about 2611 mi.

  • 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, December is the cheapest month in which you can book a flight from Islip, New York to San Francisco Bay Area (average of $113). Flying from Islip, New York to San Francisco Bay Area 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Islip to San Francisco Bay Area

See prices for flight routes from nearby airports that may be better suited for you.
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