$137 Cheap Flights from San Juan (SJU) to Islip (ISP)

View $137 flight on Fri, Jan 23, 2026Opens in a new window

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP)

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Cheap Flights from San Juan to Islip (SJU-ISP)

Prices were available within the past 7 days and start at $137 for one-way flights and $256 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Jan 15 - Sun, Jan 18
SJU
San Juan
ISP
Islip
$256 Roundtrip, found 1 day ago
$256
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Jan 15 from San Juan to Islip, returning Sun, Jan 18, priced at $256 found 1 day ago
Frontier Airlines
Fri, Dec 19 - Sun, Dec 21
SJU
San Juan
ISP
Islip
$264 Roundtrip, found 2 days ago
$264
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, Dec 19 from San Juan to Islip, returning Sun, Dec 21, priced at $264 found 2 days ago
Frontier Airlines
Thu, Jan 15 - Sun, Jan 18
SJU
San Juan
ISP
Islip
$270 Roundtrip, found 1 day ago
$270
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Jan 15 from San Juan to Islip, returning Sun, Jan 18, priced at $270 found 1 day ago
JetBlue Airways
Thu, Dec 18 - Tue, Dec 23
SJU
San Juan
ISP
Islip
$274 Roundtrip, found 2 days ago
$274
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Thu, Dec 18 from San Juan to Islip, returning Tue, Dec 23, priced at $274 found 2 days ago
JetBlue Airways
Tue, Dec 16 - Tue, Dec 23
SJU
San Juan
ISP
Islip
$279 Roundtrip, found 2 days ago
$279
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Dec 16 from San Juan to Islip, returning Tue, Dec 23, priced at $279 found 2 days ago
Frontier Airlines
Fri, Dec 19 - Tue, Dec 23
SJU
San Juan
ISP
Islip
$281 Roundtrip, found 2 days ago
$281
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, Dec 19 from San Juan to Islip, returning Tue, Dec 23, priced at $281 found 2 days ago
JetBlue Airways
Mon, Dec 15 - Tue, Dec 23
SJU
San Juan
ISP
Islip
$293 Roundtrip, found 2 days ago
$293
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Dec 15 from San Juan to Islip, returning Tue, Dec 23, priced at $293 found 2 days ago
Frontier Airlines
Thu, Dec 25 - Sat, Jan 10
SJU
San Juan
ISP
Islip
$300 Roundtrip, found 2 days ago
$300
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Dec 25 from San Juan to Islip, returning Sat, Jan 10, priced at $300 found 2 days ago
Frontier Airlines
Wed, Dec 17 - Sun, Dec 21
SJU
San Juan
ISP
Islip
$302 Roundtrip, found 2 days ago
$302
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Dec 17 from San Juan to Islip, returning Sun, Dec 21, priced at $302 found 2 days ago
Southwest Airlines
Thu, Oct 30 - Mon, Nov 3
SJU
San Juan
ISP
Islip
$563 Roundtrip, found 1 hour ago
$563
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Thu, Oct 30 from San Juan to Islip, returning Mon, Nov 3, priced at $563 found 1 hour ago

Find the cheapest month to fly from San Juan (SJU) to Islip (ISP)

January is typically the cheapest month to fly

From $125 - $911 per traveler.

Alternative airports near Islip

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

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $333
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $333

Frequently asked questions

How much does a flight from Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP) cost?
Get a cheap one-way flight from $137 or cheap return flight from $256 from Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP)?
Traveling in January may help you find better deals, as it's the cheapest month for flights between SJU and ISP. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll fly you from SJU to ISP. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP)?
There are no daily nonstop flights available from Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from SJU to ISP?
Generally you'll find the largest variety of flight choices 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 Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP)?
To avoid potential delays on the Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP) route, travel before 3 PM. Departures after this time 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.
What airports do you fly into for Islip from Luis Munoz Marin Intl. Airport (SJU)?
Luis Munoz Marin Intl. Airport (SJU) has direct flights to Islip. Here are some of the airports you can fly to without detours:

  • John F. Kennedy Intl. Airport (JFK)
  • Westchester County Airport (HPN)
  • Tweed - New Haven Regional Airport (HVN)

Is it cheaper to buy a plane ticket from Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP) last-minute?
Last-minute bookings from SJU to ISP are usually more expensive. To lock in the best prices, start searching for flights as early as possible. That being said, if you're flexible with your travel dates, you may find a cheap ticket right before your journey.
Is it cheaper to book a SJU to ISP flight and hotel package?
Securing a SJU to ISP flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our wide range of hotels and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to MacArthur Airport (ISP)?
Typically, you can modify or cancel your SJU to ISP flight. However, there may be additional fees, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want further information, go to our Customer Service portal.

Travel information

Origin airport
Luis Munoz Marin Intl.
Destination airport
MacArthur
Airlines serving
Frontier Airlines, JetBlue Airways, Southwest Airlines
Roundtrip price
$256
Distance
1600 mi

Book with confidence

San Juan to Islip Flights

The cheapest times to fly from San Juan to Islip

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 San Juan to Islip are during the month of January. You can find some of the cheapest flights from San Juan to Islip with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from San Juan to Islip: 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 San Juan to Islip

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 San Juan to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $137 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 San Juan to Islip 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 San Juan to Islip 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.

 

San Juan to Islip Flights

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*Available to One Key members.