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Islip

$131+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — ISP
Apr 13 — Apr 201
Mon 4/13
Mon 4/20
1 adult, Economy
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Cheap 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 14, 2026.

This Expedia deal was found by Cheapflights users on 3/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/111:59 pm
SFO
-
ISP
1 stop30h 09m
Frontier
Sun 8/910:03 am
ISP
-
SFO
1 stop15h 49m
Frontier
Deal found 3/9$330
This CheapOair deal was found by Cheapflights users on 3/12. 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.
Thu 7/3011:59 pm
SFO
-
ISP
1 stop30h 09m
Frontier
Tue 8/410:03 am
ISP
-
SFO
1 stop15h 49m
Frontier
Deal found 3/12$350
This CheapOair deal was found by Cheapflights users on 3/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/218:44 pm
SFO
-
ISP
1 stop10h 21m
Frontier
Tue 5/266:02 pm
ISP
-
SFO
1 stop19h 39m
Frontier
Deal found 3/13$415
This Southwest deal was found by Cheapflights users on 3/11. 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.
Sun 4/199:15 pm
SFO
-
ISP
1 stop11h 35m
Southwest
Tue 4/214:10 pm
ISP
-
SFO
1 stop8h 15m
Southwest
Deal found 3/11$422
This Southwest deal was found by Cheapflights users on 3/9. 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.
Sat 8/19:30 pm
SFO
-
ISP
1 stop11h 15m
Southwest
Sat 8/85:30 am
ISP
-
SFO
1 stop8h 25m
Southwest
Deal found 3/9$452
This Southwest deal was found by Cheapflights users on 3/9. 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.
Sat 8/111:40 pm
SFO
-
ISP
2 stops12h 15m
Southwest
Sun 8/96:20 am
ISP
-
SFO
1 stop9h 50m
Southwest
Deal found 3/9$474
This Southwest deal was found by Cheapflights users on 3/10. 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.
Thu 4/98:50 am
SFO
-
ISP
2 stops11h 40m
Southwest
Thu 4/164:30 pm
ISP
-
SFO
1 stop9h 50m
Southwest
Deal found 3/10$478

Find 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 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$330
(Expedia)

One-way from

$131
(CheapOair)

Popular in

December

Cheapest in

January

Average price

$347
Provider with most accurate pricing for San Francisco-Islip Long Island flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-Islip Long Island flights.
Search Deals
From San Francisco to Islip Long Island
Search Deals
One-way flight from San Francisco to Islip Long Island
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($18 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 March 2026
Search Deals

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 14, 2026.
Use the filters below to find and compare flights from San Francisco to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Sat 8/1

9:30 pm-11:45 am

1 stop11h 15m

Islip Long Island

Sat 8/8

5:30 am-10:55 am

1 stop8h 25m

$452

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Sat 8/1

11:40 pm-2:55 pm

2 stops12h 15m

Islip Long Island

Sun 8/9

6:20 am-1:10 pm

1 stop9h 50m

$474

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Thu 4/9

8:50 am-11:30 pm

2 stops11h 40m

Islip Long Island

Thu 4/16

4:30 pm-11:20 pm

1 stop9h 50m

$478
Quickest round-trip

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Thu 6/25

9:10 pm-8:20 am

1 stop8h 10m

Islip Long Island

Mon 6/29

12:30 pm-8:40 pm

2 stops11h 10m

$532

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Sat 3/28

5:55 pm-11:05 am

2 stops14h 10m

Islip Long Island

Sat 4/4

5:50 pm-11:55 pm

1 stop9h 05m

$568

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Wed 6/17

8:25 am-10:35 pm

2 stops11h 10m

Islip Long Island

Sun 6/21

3:30 pm-11:30 pm

2 stops11h 00m

$580

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Thu 3/26

9:25 am-11:55 pm

2 stops11h 30m

Islip Long Island

Mon 3/30

6:00 am-3:25 pm

2 stops12h 25m

$624
Cheapest one-way

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Sat 5/30

8:44 pm-10:05 am

1 stop10h 21m

$175

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Fri 5/1

10:55 pm-11:35 am

2 stops9h 40m

$239

San FranciscoIslip

SFO - ISP

SFOISP

San Francisco

Sun 6/14

11:40 pm-11:50 am

2 stops9h 10m

$239

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/13

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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, July is the cheapest month in which you can book a flight from San Francisco to Islip, New York (average of $119). Flying from San Francisco to Islip, New York in June is currently the most expensive (average of $203). 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.

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 14, 2026.
Peruse reviews from past customers who have flown with Southwest 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
4,317 reviews

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,317 reviews
Southwest
8.0
Very good
4,317 reviews

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

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.

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

    Airlines like Southwest fly from San Francisco to Islip, New York in about 11h 15m. The time it takes to get you to your destination can typically vary by up to . There are 2611 mi between San Francisco and Islip, New York.

  • What is the cheapest airline to fly from San Francisco to Islip, New York round-trip?

    Currently priced at $318, 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.

  • 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, July is the cheapest month in which you can book a flight from San Francisco to Islip, New York (average of $119). Flying from San Francisco to Islip, New York in June is currently the most expensive (average of $203). 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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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 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$318Average$558FlexibilityNo cancel feeOn-time63%

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