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Islip

$484+ Cheap flights from San José (SJO) to Islip (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 1/3. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — ISP
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from San José to Islip

Discover tips and strategies to find the most affordable flight options for your journey from San José (SJO) 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 September 17, 2025.

Popular in

April

Cheapest in

September

Average price

$312
Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 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 San José to Islip

One-way flights from San José to Islip
Search for one-way flight options from San José to Islip. Find affordable one-way fares based on user searches. Data last updated September 17, 2025.

This Frontier deal was found by Cheapflights users on 9/17. 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.
Sat 1/310:41 amSJO - ISP
1 stop8h 33mFrontier
Deal found 9/17$484
This JetBlue deal was found by Cheapflights users on 9/16. 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.
Sun 1/410:00 amSJO - ISP
1 stop7h 44mJetBlue
Deal found 9/16$1,520

Cheapflights Fare Finder

 
Customize your flight search to find flights from San José 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 September 17, 2025.
Use the filters below to find and compare flights from San José to Islip that are best for you.

Fly from

San José

Fly to

Islip

Route

Depart

Return

Price

San JoséIslip

SJO - ISP

SJOISP

San José Juan Santamaria Intl

Sat 1/3

10:41 am-8:14 pm

1 stop8h 33m

$484

San JoséIslip

SJO - ISP

SJOISP

San José Juan Santamaria Intl

Sun 1/4

10:00 am-6:44 pm

1 stop7h 44m

$1,520

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Best time to book a flight from San José to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from San José 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 José to Islip

What is the cheapest month to book a flight from San José, San José Province to Islip?

Currently, January is the cheapest month in which you can book a flight from San José, San José Province to Islip (average of $108). Flying from San José, San José Province to Islip 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.

Related info for your journey

Find useful and relevant information for your journey from San José to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San José 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 José, San José Province to Islip?

    Currently, January is the cheapest month in which you can book a flight from San José, San José Province to Islip (average of $108). Flying from San José, San José Province to Islip 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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