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$150+ Cheap flights from San Francisco to Islip, NY (SFO - ISP)

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 7/13. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ISP
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap 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 June 12, 2025.

Round-trip from

$348
(Southwest)

One-way from

$150
(JetBlue)

Popular in

December

Cheapest in

February

Average price

$477
From San Francisco to Islip Long Island
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One-way flight from San Francisco to Islip Long Island
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Highest demand for flights based on searches. 4% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from San Francisco to Islip

Cheapest flights from San Francisco to Islip
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 June 12, 2025.

This Southwest deal was found by Cheapflights users on 6/10. 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.
Wed 8/275:55 amSFO - ISP
2 stops12h 10mSouthwest
Sat 8/3012:20 pmISP - SFO
1 stop9h 00mSouthwest
Deal found 6/10$348
This JetBlue deal was found by Cheapflights users on 6/11. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1011:59 pmSFO - ISP
1 stop9h 21mJetBlue
Tue 11/181:15 pmISP - SFO
1 stop12h 33mJetBlue
Deal found 6/11$404
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/148:53 pmSFO - ISP
1 stop19h 43mFrontier
Sat 6/218:21 pmISP - SFO
1 stop16h 58mFrontier
Deal found 6/10$456
This FlightHub deal was found by Cheapflights users on 6/11. 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 8/2012:24 pmSFO - ISP
3 stops27h 35mBreeze Airways
Mon 8/2510:36 amISP - SFO
2 stops28h 12mBreeze Airways
Deal found 6/11$662
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/148:53 pmSFO - ISP
1 stop19h 43mMultiple Airlines
Sun 6/227:39 pmISP - SFO
3 stops19h 05mMultiple Airlines
Deal found 6/10$676

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 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from San Francisco to Islip that are best for you.

Fly from

San Francisco

Fly to

Islip

Route

Depart

Return

Price

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 8/27

5:55 am-9:05 pm

2 stops12h 10m

Islip Long Island

Sat 8/30

12:20 pm-6:20 pm

1 stop9h 00m

$348

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Mon 11/10

11:59 pm-12:20 pm

1 stop9h 21m

Islip Long Island

Tue 11/18

1:15 pm-10:48 pm

1 stop12h 33m

$404

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 8/20

6:50 am-11:41 pm

2 stops13h 51m

Islip Long Island

Mon 8/25

8:59 am-9:21 pm

2 stops15h 22m

$457

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 8/20

12:24 pm-6:59 pm

3 stops27h 35m

Islip Long Island

Mon 8/25

10:36 am-11:48 am

2 stops28h 12m

$662

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 6/25

11:59 pm-9:56 am

3 stops30h 57m

Islip Long Island

Sun 6/29

7:39 pm-10:53 pm

3 stops30h 14m

$1,219

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Sun 7/13

9:14 pm-10:51 am

1 stop10h 37m

$150

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 7/9

9:00 pm-9:25 am

1 stop9h 25m

$195

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Thu 7/17

8:53 pm-7:42 pm

1 stop19h 49m

$251

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 8/20

12:24 pm-6:59 pm

3 stops27h 35m

$378

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 7/9

12:30 am-8:01 pm

3 stops16h 31m

$434

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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.
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 San Francisco to Islip

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

Currently, January is the cheapest month in which you can book a flight from San Francisco to Islip, New York (average of $108). Flying from San Francisco to Islip, New York in November is currently the most expensive (average of $213). 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.

What is the cheapest time of day to fly from SFO to ISP?

Find hourly flight availability from San Francisco to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

A simple way to save on the total cost of your ticket is to fly from San Francisco to Islip, New York at noon. If you’re flexible enough to do this you can expect to save up to 35% on your trip compared to booking a flight in the afternoon.

Rainfall in Islip by month

Plan your trip to Islip by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

Temperature in Islip by month

Plan your trip to Islip by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 June 12, 2025.
Get a feel of what it's like to fly with Breeze Airways, Southwest and JetBlue from San Francisco to Islip by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Breeze Airways
8.1
Very good
178 reviews

Overall

8.1

Entertainment

6.6

Comfort

8.2

Food

6.7

Boarding

8.3

Crew

8.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Breeze Airways
8.1
Very good
178 reviews
Breeze Airways
8.1
Very good
178 reviews

Overall

8.1

Entertainment

6.6

Comfort

8.2

Food

6.7

Boarding

8.3

Crew

8.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Southwest
8.0
Very good
4,287 reviews
Breeze Airways
8.1
Very good
178 reviews

Overall

8.1

Entertainment

6.6

Comfort

8.2

Food

6.7

Boarding

8.3

Crew

8.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
JetBlue
7.3
Good
2,925 reviews
Breeze Airways
8.1
Very good
178 reviews

Overall

8.1

Entertainment

6.6

Comfort

8.2

Food

6.7

Boarding

8.3

Crew

8.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Frontier
6.0
Okay
3,295 reviews
Breeze Airways
8.1
Very good
178 reviews

Overall

8.1

Entertainment

6.6

Comfort

8.2

Food

6.7

Boarding

8.3

Crew

8.8

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

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.

  • What are the cheapest airlines flying from San Francisco to Islip, New York round-trip?

    Currently priced at $348, Southwest will fly you from San Francisco to Islip, New York and back. In addition to Southwest, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from JetBlue and Frontier - these airlines can fly you to your destination from $404 and $457, respectively.

  • What are the cheapest airlines to fly from San Francisco to Islip, New York one-way?

    For one-way options, check prices for JetBlue. According to our data, you can fly for as low as $150. Users have also found prices from $195 and $251 on Southwest and Frontier, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Islip 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 San Francisco to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from San Francisco to Islip, New York (average of $108). Flying from San Francisco to Islip, New York in November is currently the most expensive (average of $213). 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
Southampton
Riverhead

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Alternative routes for San Francisco to Islip

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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 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$323Average$558FlexibilityNo cancel feeOn-time63%

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