$110 Cheap Flights from Islip (ISP) to San José (SJO)

View $110 flight on Mon, Feb 9, 2026Opens in a new window

Popular airlines from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO)

Cheap Flights from Islip to San José (ISP-SJO)

Prices were available within the past 7 days and start at $110 for one-way flights and $319 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Mon, Dec 15 - Wed, Dec 31
ISP
Islip
SJO
San José
$319 Roundtrip, found 2 days ago
$319
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Dec 15 from Islip to San José, returning Wed, Dec 31, priced at $319 found 2 days ago
JetBlue Airways
Mon, Dec 8 - Mon, Dec 15
ISP
Islip
SJO
San José
$326 Roundtrip, found 1 day ago
$326
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Mon, Dec 8 from Islip to San José, returning Mon, Dec 15, priced at $326 found 1 day ago
JetBlue Airways
Fri, Feb 6 - Tue, Feb 17
ISP
Islip
SJO
San José
$330 Roundtrip, found 4 days ago
$330
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Fri, Feb 6 from Islip to San José, returning Tue, Feb 17, priced at $330 found 4 days ago
JetBlue Airways
Mon, Nov 17 - Fri, Dec 5
ISP
Islip
SJO
San José
$336 Roundtrip, found 1 day ago
$336
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Mon, Nov 17 from Islip to San José, returning Fri, Dec 5, priced at $336 found 1 day ago
JetBlue Airways
Mon, Nov 17 - Thu, Dec 4
ISP
Islip
SJO
San José
$341 Roundtrip, found 1 day ago
$341
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Mon, Nov 17 from Islip to San José, returning Thu, Dec 4, priced at $341 found 1 day ago
JetBlue Airways
Mon, Dec 8 - Wed, Dec 24
ISP
Islip
SJO
San José
$344 Roundtrip, found 5 days ago
$344
Roundtrip
found 5 days ago
Select JetBlue Airways flight, departing Mon, Dec 8 from Islip to San José, returning Wed, Dec 24, priced at $344 found 5 days ago
JetBlue Airways
Wed, Nov 19 - Fri, Dec 5
ISP
Islip
SJO
San José
$346 Roundtrip, found 1 day ago
$346
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Wed, Nov 19 from Islip to San José, returning Fri, Dec 5, priced at $346 found 1 day ago
JetBlue Airways
Mon, Feb 9 - Wed, Feb 11
ISP
Islip
SJO
San José
$351 Roundtrip, found 4 days ago
$351
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Mon, Feb 9 from Islip to San José, returning Wed, Feb 11, priced at $351 found 4 days ago
Frontier Airlines
Fri, Dec 5 - Sat, Dec 20
ISP
Islip
SJO
San José
$478 Roundtrip, found 1 day ago
$478
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Dec 5 from Islip to San José, returning Sat, Dec 20, priced at $478 found 1 day ago
Southwest Airlines
Sat, Jan 17 - Sun, Jan 25
ISP
Islip
SJO
San José
$578 Roundtrip, found 16 hours ago
$578
Roundtrip
found 16 hours ago
Select Southwest Airlines flight, departing Sat, Jan 17 from Islip to San José, returning Sun, Jan 25, priced at $578 found 16 hours ago

Alternative airports near San José

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Juan Santamaria Intl. SJO. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $442
SJO
Juan Santamaria Intl.
Cheapest
Average driving time to city center20 min
Flights from $442

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO) cost?
Secure a cheap one-way flight from $110 or cheap return flight from $319 from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO)?
The cheapest month to fly from ISP to SJO is December, when demand is low. Off-peak season is typically when airlines offer better prices between these airports.
Which airlines fly direct from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO)?
You can't fly direct to Juan Santamaria Intl. Airport (SJO) from Islip, NY (ISP-MacArthur). However, you can seamlessly travel to San José without any layovers by departing from John F. Kennedy Intl. Airport (JFK).
What is the cheapest airline that flies from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll fly you from ISP to SJO. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO)?
You'll have to take a flight with a layover if you're traveling from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from ISP to SJO?
Typically you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* However, this can vary based on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO)?
To avoid possible delays on the MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO) route, travel before 3 PM. Later departures have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO) last-minute?
Booking your flight from ISP to SJO right before your trip is typically more expensive. But if there's some wiggle room with your departure dates and times, you could land a cheap last-minute fare.
Is it cheaper to book an ISP to SJO flight and hotel package?
You'll typically save money by booking an ISP to SJO flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've chosen your ideal flights and accommodations, consider adding extras such as activities, car rentals and tours.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Juan Santamaria Intl. Airport (SJO)?
If you reserved your ISP to SJO flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

Travel information

Origin airport
MacArthur
Destination airport
Juan Santamaría Intl.
Airlines serving
JetBlue Airways, Southwest Airlines
Roundtrip price
$319
Distance
2233 mi

Book with confidence

Islip to San José Flights

The cheapest times to fly from Islip to San José

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Islip to San José are during the month of December. You can find some of the cheapest flights from Islip to San José with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to San José

Sunday is one of the best days to book for cheap flights from Islip to San José: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Islip to San José

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Islip to San José in 2025. You can also book with separate airlines for your outbound and return journeys, from $110 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Islip to San José flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Islip to San José airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Islip to San José Flights

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*Available to One Key members.