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$390+ Cheap flights from Islip to San Jose (ISP - SJC)

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SJC
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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Cheap 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 septiembre 11, 2025.

Round-trip from

$659
(Southwest)

One-way from

$390
(Cheapflightsfares)

Popular in

December

Cheapest in

January

Average price

$359
From Islip Long Island to San Jose
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One-way flight from Islip Long Island to San Jose
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Highest demand for flights based on searches. 1% potential increase in price ($5 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 September 2025
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Find 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 septiembre 11, 2025.

This Southwest deal was found by Cheapflights users on 9/10. 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.
vie. 10/105:30 amISP - SJC
1 stop13h 30mSouthwest
dom. 10/128:55 pmSJC - ISP
1 stop11h 55mSouthwest
Deal found 9/10$659
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/142:19 pmISP - SJC
2 stops11h 41mMultiple Airlines
lun. 11/177:47 pmSJC - ISP
2 stops12h 11mMultiple Airlines
Deal found 9/9$826
This Southwest deal was found by Cheapflights users on 9/9. 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.
dom. 11/2311:05 amISP - SJC
2 stops13h 00mSouthwest
dom. 11/308:10 amSJC - ISP
2 stops11h 00mSouthwest
Deal found 9/9$917
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/262:19 pmISP - SJC
2 stops11h 19mMultiple Airlines
sáb. 10/47:50 pmSJC - ISP
2 stops12h 08mMultiple Airlines
Deal found 9/10$932
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/52:19 pmISP - SJC
2 stops11h 41mMultiple Airlines
mar. 10/76:59 pmSJC - ISP
2 stops12h 59mMultiple Airlines
Deal found 9/9$1,776

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 septiembre 11, 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

vie. 10/10

5:30 am-4:00 pm

1 stop13h 30m

San Jose

dom. 10/12

8:55 pm-11:50 am

1 stop11h 55m

$659

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

vie. 11/14

2:19 pm-11:00 pm

2 stops11h 41m

San Jose

lun. 11/17

7:47 pm-10:58 am

2 stops12h 11m

$826

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

dom. 11/23

11:05 am-9:05 pm

2 stops13h 00m

San Jose

dom. 11/30

8:10 am-10:10 pm

2 stops11h 00m

$917

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

vie. 9/26

2:19 pm-10:38 pm

2 stops11h 19m

San Jose

sáb. 10/4

7:50 pm-10:58 am

2 stops12h 08m

$932

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

dom. 10/5

2:19 pm-11:00 pm

2 stops11h 41m

San Jose

mar. 10/7

6:59 pm-10:58 am

2 stops12h 59m

$1,776

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

mar. 12/9

2:19 pm-10:59 pm

2 stops11h 40m

$390

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

dom. 12/7

2:19 pm-10:59 pm

2 stops11h 40m

$425

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

lun. 12/8

2:19 pm-10:59 pm

2 stops11h 40m

$425

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

vie. 11/14

2:19 pm-11:00 pm

2 stops11h 41m

$425

IslipSan Jose

ISP - SJC

ISPSJC

Islip Long Island

jue. 9/18

2:19 pm-10:38 pm

2 stops11h 19m

$431

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 12 results
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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 to San Jose?

Currently, September is the cheapest month in which you can book a flight from Islip to San Jose (average of $255). Flying from Islip to San Jose in June is currently the most expensive (average of $358). 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 to San Jose?

    Departing from Islip to San Jose will take you 13h 30m. Airlines will cover 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 to San Jose?

    Currently, September is the cheapest month in which you can book a flight from Islip to San Jose (average of $255). Flying from Islip to San Jose in June is currently the most expensive (average of $358). 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

Browse thousands of different options on Cheapflights for your next trip

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