Cheap Flights from Islip to San Juan

Compare Islip to San Juan flight deals

Find the cheapest month or even day of the year to fly to San Juan

Book the best San Juan fare with no extra fees

Flight deals from Islip to San Juan

Looking for a cheap last-minute deal or the best return flight from Islip Airport to San Juan? If you want to travel next month, return fares start from ر.ق.‏ 1,223. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Islip to San Juan

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Islip to San Juan flights are currently cheapest in June.

Islip to San Juan: Flight information

The things to know before you go.
Cheapest flight foundر.ق.‏ 703
Cheapest month to flyJune

Finding cheap flights from Islip to San Juan: Frequently asked questions

There are 6 airports in San Juan: San Juan Isla Grande, San Juan Luis Munoz Marin, Roosevelt Roads, Ponce, Vieques, and Culebra.
The best price we found for a return flight from Islip to San Juan is ر.ق.‏ 1,226. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Islip to San Juan. But we found flights with one or more stops from ر.ق.‏ 1,226.
As of June 2026, there are no flights flying from Islip to San Juan.
The cheapest month to fly from Islip to San Juan is usually July.
If you're flying from Islip Airport, the cheapest airport near San Juan is San Juan Luis Munoz Marin – which is 11.3 km away from the centre of San Juan. We've found flights into this airport from ر.ق.‏ 1,226.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Islip Airport to San Juan on Wednesday, 1 July 2026.
No airlines currently offer direct flights between Islip Airport and San Juan. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Juan but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Juan is around 40 days in advance, so don’t leave your flight to the last minute.
In June, the average temperature is usually around 27°C. August is typically the warmest month in San Juan, when it usually averages around 29°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging 23°C. The rainiest month is September.
Currently, Frontier Airlines offers the cheapest flight tickets to San Juan.

Flying from Long Island MacArthur Airport (ISP) to San Juan: what you need to know

  • The timezone in San Juan is UTC-4. The city is one hour ahead of Islip, where Long Island MacArthur Airport is located.

  • For hassle-free travel, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This will give you plenty of time to board your ISP to San Juan flight.

  • You'll likely experience longer lines during popular months like February. Arriving up to four hours ahead of an international flight and two hours for a domestic departure is a good idea.

  • We make it simple to book plane tickets from ISP to San Juan with a stopover. To see all your options, uncheck 'Direct flights only.' Next, select a flight offering a stop long enough to explore the city of your choice. Some popular stopovers include:

    • Miami International Airport (MIA)

    • Baltimore Washington International Airport (BWI)

    • Raleigh-Durham International Airport (RDU)

  • Travelling from central Islip to ISP takes around 30 minutes on public transport. If you drive, ride-share or get a taxi, you'll cover the 11 kilometres in 10 minutes or so, depending on traffic conditions.

  • Have an early flight from Long Island MacArthur Airport to San Juan? Avoid the last-minute rush to the airport (and sneak in some extra snooze time) by choosing one of these stays near ISP:

  • When it comes to the on-time performance of Long Island MacArthur Airport, 76% of flights arrive within the scheduled time frame.

  • ISP is located at 100 Arrivals Avenue.

How to find the cheapest flights from Long Island MacArthur Airport (ISP) to San Juan

  • ر.ق.‏ 703 is currently the best price for a one-way Long Island MacArthur Airport to San Juan flight. A return plane ticket starts at ر.ق.‏ 1,226. These fares may change depending on demand.

  • Don't leave everything to the last minute. You're more likely to pick up cheap flights from ISP to San Juan if you book in advance. Airlines often have some amazing early bird deals.

  • The 'Whole month' tool will show you the cheapest tickets from Long Island MacArthur Airport to San Juan throughout the entire month. It's an easy way to snap up a bargain if your travel dates are flexible.

  • Finding a cheap flight from ISP to San Juan is easy with Price Alerts. All you need to do is create one of these automatic notifications and we'll get in touch as soon as the price has dropped.

  • Tailor your trip with filters. Choose your ideal arrival and departure times, airlines and total journey duration. You can also sort results by 'Best,' 'Cheapest' or 'Fastest' flights from Long Island MacArthur Airport to San Juan.

Airports in San Juan

Luis Munoz Marin International Airport (SJU)

  • Luis Munoz Marin International Airport (SJU) is around 11 kilometres from the centre of San Juan. If you're catching a taxi or a ride-share, the drive will take roughly 20 minutes.

  • When travelling on public transport, expect a journey time of around 1 hour.

  • Consider staying in a hotel close to SJU if you're coming in on a late flight from Long Island MacArthur Airport to San Juan. Pick one of these accommodation options and make your arrival easier:

  • To get the lowest price, reserve your vehicle from Luis Munoz Marin International Airport about two weeks in advance of your flight from ISP to San Juan.

Best time to go to San Juan

  • It's time to figure out your travel dates for your flight from Long Island MacArthur Airport to San Juan. March is the most popular month to visit San Juan. If you prefer a more peaceful vibe, go in December.

  • The warmest month in San Juan is August, with temperatures ranging between 24ºC and 32ºC. Lock in your Long Island MacArthur Airport to San Juan plane ticket then if that's your ideal forecast.

  • February sees average temperatures of between 21ºC and 28ºC. Search for a cheap ticket from ISP to San Juan around that time if you like travelling in cooler conditions.

More about San Juan

  • When it comes to looking for somewhere to lay your head, you'll find the best stays in San Juan right here. Explore these hotels as soon as you've booked your flight from Long Island MacArthur Airport to San Juan:

  • All great adventures should include some sightseeing. Esperanza Beach, Balneario El Escambron and Escambron Green are attractions you won't want to skip in San Juan.

Explore more of Puerto Rico

  • San Juan is easy to fall in love with, but there are so many other parts of Puerto Rico waiting to be explored. Around 113 kilometres west of San Juan, a trip to Aguadilla will keep you busy. Start with leading sights like Silla Aguadilla, Bridges Surf Beach and Playa Rompe Olas.

  • If you're eager to discover another side of Puerto Rico, head for Isabela, roughly 105 kilometres west of San Juan. Playa montones, Shore Island Beach and Guajataca Forest Reserve are key reasons to visit.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.