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Islip

$146+ 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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ISP
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$338
(CheapOair)

One-way from

$146
(CheapOair)

Popular in

December

Cheapest in

February

Average price

$437
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. 6% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 29, 2025.

This CheapOair deal was found by Cheapflights users on 7/29. 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.
Thu 8/148:53 pmSFO - ISP
1 stop19h 49mFrontier
Sat 8/168:37 pmISP - SFO
1 stop16h 48mFrontier
Deal found 7/29$338
This JetBlue deal was found by Cheapflights users on 7/29. 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.
Thu 10/2310:15 pmSFO - ISP
1 stop9h 35mJetBlue
Mon 10/2712:15 pmISP - SFO
1 stop14h 09mJetBlue
Deal found 7/29$410
This Southwest deal was found by Cheapflights users on 7/28. 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 9/256:20 amSFO - ISP
2 stops13h 35mSouthwest
Sun 9/286:00 amISP - SFO
1 stop12h 40mSouthwest
Deal found 7/28$438
This FlightHub deal was found by Cheapflights users on 7/27. 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 8/148:53 pmSFO - ISP
1 stop19h 49mMultiple Airlines
Sun 8/177:39 pmISP - SFO
3 stops19h 05mMultiple Airlines
Deal found 7/27$592
This KAYAK deal was found by Cheapflights users on 7/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/912:50 pmSFO - ISP
2 stops27h 51mBreeze Airways
Mon 9/158:47 pmISP - SFO
2 stops18h 18mBreeze Airways
Deal found 7/26$683

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 July 29, 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

Thu 8/14

8:53 pm-7:42 pm

1 stop19h 49m

Islip Long Island

Sat 8/16

8:37 pm-10:25 am

1 stop16h 48m

$338

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Thu 10/23

10:15 pm-10:50 am

1 stop9h 35m

Islip Long Island

Mon 10/27

12:15 pm-11:24 pm

1 stop14h 09m

$410

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Thu 9/25

6:20 am-10:55 pm

2 stops13h 35m

Islip Long Island

Sun 9/28

6:00 am-3:40 pm

1 stop12h 40m

$438

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Thu 8/14

8:53 pm-7:42 pm

1 stop19h 49m

Islip Long Island

Sun 8/17

7:39 pm-11:44 am

3 stops19h 05m

$592

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Tue 9/9

12:50 pm-7:41 pm

2 stops27h 51m

Islip Long Island

Mon 9/15

8:47 pm-12:05 pm

2 stops18h 18m

$683

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 8/13

8:53 pm-11:47 pm

1 stop23h 54m

$146

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Mon 8/25

9:25 pm-11:41 am

1 stop11h 16m

$150

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 9/17

7:50 am-10:05 pm

2 stops11h 15m

$172

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 9/3

12:39 pm-1:39 pm

1 stop22h 00m

$376

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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 July 29, 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.

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 July 29, 2025.
Peruse reviews from past customers who have flown with Southwest, Breeze Airways, and JetBlue from San Francisco to Islip to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Breeze Airways
8.0
Very good
190 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
JetBlue
7.3
Good
2,913 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Frontier
5.9
Fair
3,238 reviews
Southwest
8.0
Very good
4,238 reviews

Comfort

8.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Food

7.0

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 $338, Frontier will fly you from San Francisco to Islip, New York and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from JetBlue and Southwest - these airlines can fly you to your destination from $410 and $438, respectively.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $146. Users have also found prices from $150 and $172 on JetBlue and Southwest, 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 Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

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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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$323Average$558FlexibilityNo cancel feeOn-time63%

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