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$563+ Cheap flights from Islip, NY to San Jose, CA (ISP - SJC)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SJC
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Islip to San Jose

Cheapest flights from Islip to San Jose
Explore the most affordable flight options available from Islip to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This Expedia deal was found by Cheapflights users on 12/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/289:59 amISP - SJC
2 stops15h 40mMultiple Airlines
Thu 1/15:57 pmSJC - ISP
2 stops14h 08mMultiple Airlines
Deal found 12/13$2,784

Find flight deals from Islip to San Jose

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Jose (SJC). 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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$563
(Southwest)

Popular in

November

Cheapest in

January

Average price

$422
Provider with most accurate pricing for Islip Long Island-San Jose flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-San Jose flights.
Search Deals
From Islip Long Island to San Jose
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to San Jose 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 December 15, 2025.
Use the filters below to find and compare flights from Islip to San Jose that are best for you.

Fly from

Islip

Fly to

San Jose

Route

Depart

Return

Price

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Fri 1/9

12:40 pm-9:55 pm

2 stops12h 15m

San Jose

Sun 1/11

6:40 am-10:20 pm

2 stops12h 40m

$563

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

Sun 12/28

9:59 am-10:39 pm

2 stops15h 40m

San Jose

Thu 1/1

5:57 pm-11:05 am

2 stops14h 08m

$2,784

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Compare providers for flights from Islip to San Jose

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 Islip to San Jose in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
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 Islip, New York-San Jose, California flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-San Jose, California flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Islip, New York-San Jose, California flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-San Jose, California flights, Cheapflights users trust eDreams the most. eDreams 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 Islip, New York-San Jose, California 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 Islip to San Jose

Have a flexible travel schedule? Discover the best time to fly to San Jose 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 Jose

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

Currently, February is the cheapest month in which you can book a flight from Islip, New York to San Jose, California (average of $71). Flying from Islip, New York to San Jose, California 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 Jose. 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 Islip, New York to San Jose, California?

    There are many flights that can get you from Islip, New York to San Jose, California in 12h 15m. Fly via Southwest to get the fastest option. Islip, New York and San Jose, California are separated by a distance of 2594 mi.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to San Jose 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 Jose, California?

    Currently, February is the cheapest month in which you can book a flight from Islip, New York to San Jose, California (average of $71). Flying from Islip, New York to San Jose, California 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

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