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Islip

$139+ 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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ISP
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$259
(JetBlue)

One-way from

$139
(Frontier)

Popular in

June

Cheapest in

February

Average price

$373
Provider with most accurate pricing for San Francisco-Islip Long Island flight deals.
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Provider most trusted by Cheapflights users for San Francisco-Islip Long Island flights.
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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. 15% potential increase in price ($78 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 26, 2025.

This JetBlue deal was found by Cheapflights users on 3/25. 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.
Sat 5/108:00 amSFO - ISP
1 stop10h 28mJetBlue
Tue 5/206:00 amISP - SFO
1 stop9h 44mJetBlue
Deal found 3/25$259
This Frontier deal was found by Cheapflights users on 3/25. 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.
Fri 4/410:17 pmSFO - ISP
1 stop13h 11mFrontier
Sun 4/69:00 amISP - SFO
1 stop15h 30mFrontier
Deal found 3/25$288
This Southwest deal was found by Cheapflights users on 3/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1110:45 pmSFO - ISP
2 stops9h 50mSouthwest
Wed 7/169:55 amISP - SFO
1 stop10h 55mSouthwest
Deal found 3/26$432
This Mytrip deal was found by Cheapflights users on 3/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/96:00 pmSFO - ISP
2 stops21h 45mMultiple Airlines
Sun 4/1312:56 pmISP - SFO
3 stops31h 11mMultiple Airlines
Deal found 3/25$960
This KAYAK deal was found by Cheapflights users on 3/25. 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.
Mon 5/1212:29 pmSFO - ISP
3 stops21h 43mBreeze Airways
Sun 5/187:39 pmISP - SFO
3 stops19h 05mBreeze Airways
Deal found 3/25$1,047

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 March 26, 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

Sat 5/10

8:00 am-9:28 pm

1 stop10h 28m

Islip Long Island

Tue 5/20

6:00 am-12:44 pm

1 stop9h 44m

$259

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Thu 5/8

9:57 pm-10:12 am

1 stop9h 15m

Islip Long Island

Tue 5/20

6:48 pm-12:58 pm

1 stop21h 10m

$298

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Fri 7/11

10:45 pm-11:35 am

2 stops9h 50m

Islip Long Island

Wed 7/16

9:55 am-5:50 pm

1 stop10h 55m

$432

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 4/9

6:00 pm-6:45 pm

2 stops21h 45m

Islip Long Island

Sun 4/13

12:56 pm-5:07 pm

3 stops31h 11m

$960

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Mon 5/12

12:29 pm-1:12 pm

3 stops21h 43m

Islip Long Island

Sun 5/18

7:39 pm-11:44 am

3 stops19h 05m

$1,047

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Sun 5/11

9:57 pm-10:12 am

1 stop9h 15m

$139

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Tue 5/6

8:00 am-9:28 pm

1 stop10h 28m

$140

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Fri 5/23

5:25 am-5:25 pm

2 stops9h 00m

$269

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Tue 5/6

12:33 pm-1:45 pm

2 stops22h 12m

$461

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Fri 5/23

6:09 pm-6:59 pm

3 stops45h 50m

$639

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Compare providers for flights from San Francisco to Islip

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 San Francisco to Islip in March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
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 San Francisco-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Francisco-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Francisco-Islip, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Francisco-Islip, New York flights, Cheapflights users trust FlightHub the most. FlightHub 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 San Francisco-Islip, New York 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 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 March 26, 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 March 26, 2025.
Get a feel of what it's like to fly with Southwest, Breeze Airways 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.
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.1

Comfort

8.1

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
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.1

Comfort

8.1

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
156 reviews
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.1

Comfort

8.1

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
2,923 reviews
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.1

Comfort

8.1

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
6.0
Okay
3,272 reviews
Southwest
8.1
Very good
4,274 reviews

Crew

8.6

Entertainment

7.6

Food

7.1

Boarding

8.2

Overall

8.1

Comfort

8.1

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 $259, JetBlue will fly you from San Francisco to Islip, New York and back. In addition to JetBlue, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and Southwest - these airlines can fly you to your destination from $298 and $432, 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 $139. Users have also found prices from $140 and $461 on JetBlue and Breeze Airways, 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?

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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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$323Average$576FlexibilityNo cancel feeOn-time63%
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