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ISP - SJU

$135 Find cheap flights from Islip, New York to San Juan Luis Munoz Marin Intl Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to San Juan departing on 6/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
lun. 5/27
lun. 6/3

Search hundreds of travel sites at once for deals on flights to San Juan

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to San Juan, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to San Juan, as well as popular online travel agencies
In the last 7 days travelers have searched 44,335,567 times on KAYAK, and here is why:

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Cheap flight deals from Islip to San Juan (ISP-SJU)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to San Juan that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
6:05 pm - 2:15 amISP-SJU
8h 10m1 stop
3:09 am - 8:43 amSJU-ISP
29h 34m1 stop
$150Frontier
Find Deal
jue., may. 9 - vie., may. 10
5:25 pm - 2:03 amISP-SJU
8h 38m1 stop
8:09 pm - 8:26 amSJU-ISP
12h 17m1 stop
$170Frontier
Find Deal
mar., sep. 10 - mar., sep. 17
9:50 pm - 10:38 amISP-SJU
12h 48m1 stop
8:15 pm - 10:05 amSJU-ISP
13h 50m1 stop
$193Frontier
Find Deal
mar., may. 7 - mié., may. 8
9:50 pm - 10:24 amISP-SJU
12h 34m1 stop
8:11 pm - 8:43 amSJU-ISP
12h 32m1 stop
$218Frontier
Find Deal
jue., may. 9 - sáb., may. 11
6:05 pm - 10:24 amISP-SJU
16h 19m1 stop
3:09 am - 8:43 amSJU-ISP
29h 34m1 stop
$219Frontier
Find Deal
jue., may. 9 - vie., may. 10
9:50 pm - 10:38 amISP-SJU
12h 48m1 stop
8:15 pm - 10:05 amSJU-ISP
13h 50m1 stop
$233Frontier
Find Deal
mar., may. 7 - mié., may. 8
4:46 pm - 2:00 amISP-SJU
9h 14m1 stop
10:23 pm - 8:26 amSJU-ISP
10h 03m1 stop
$270Frontier
Find Deal
lun., jun. 17 - lun., jul. 15
4:49 pm - 1:58 amISP-SJU
9h 09m1 stop
2:49 am - 11:39 amSJU-ISP
8h 50m1 stop
$278Frontier
Find Deal
lun., may. 20 - mié., may. 22
1:05 pm - 11:30 pmISP-SJU
34h 25m3 stops
2:14 pm - 12:25 pmSJU-ISP
22h 11m3 stops
$665
Find Deal
jue., may. 9 - sáb., may. 11
1:05 pm - 2:10 amISP-SJU
13h 05m2 stops
2:14 pm - 12:25 pmSJU-ISP
22h 11m3 stops
$724
Find Deal
jue., may. 9 - sáb., may. 11

Flights from Islip to San Juan - Travel Insights & Trends

Get data-powered insights and trends into flights from Islip to San Juan to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Islip, New York to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Islip, New York to San Juan Luis Munoz Marin Intl Airport is September, where tickets cost $202 on average. On the other hand, the most expensive months are December and April, where the average cost of tickets is $455 and $427 respectively.

How far in advance should I book a flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Islip, New York to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 30 days before departure.

Good to know

Low season

May

High season

August

Cheapest flight

$135
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly and prices are also 25% lower on average.
Flight from Islip to San Juan

When to book flights from Islip to San Juan

Are your dates flexible? Find out the best times to travel from Islip to San Juan based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Islip to San Juan flights

  • What is the cheapest flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

    In the last 3 days, the lowest price for a flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport was $135 for a one-way ticket and $150 for a round-trip.

  • Do I need a passport to fly between Islip and San Juan?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Islip and on arrival in San Juan.

  • Which airports will I be using when flying from Islip to San Juan?

    Islip airport is called Islip Long Island and the only airport in San Juan is San Juan Luis Munoz Marin Intl.

  • Which aircraft models fly most regularly from Islip to San Juan?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Islip to San Juan?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to San Juan.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to San Juan?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Islip is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to San Juan?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Juan with an airline and back to Islip with another airline. Booking your flights between Islip and SJU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to San Juan?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Juan from Islip up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from Islip to San Juan

 
See real verified KAYAK customer reviews for airlines flying from Islip to San Juan. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Islip to San Juan? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.3
FrontierOverall score based on 4132 reviews
5.8comfort
4.9entertainment
7.1crew
5.2food
6.6boarding
Airline reviews

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

2.0 Mediocrejohn, Apr 2024IAH - MCO
Read more about Frontier reviews

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight was OK. Seats were good no cell phone charges on the plane no TVs or entertainment.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

Flight cancelled and was told by a rude gate agent that they don’t accommodate on other airlines. Had to wait 5 hours for a connecting flight that had a 7 hour layover. Would not allow bags to be checked early so we couldn’t go through security .Had to rent a car for the afternoon to store bags and get a meal. Also incurred a hotel fee. No apology or reason given for the cancellation- just rudeness.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Not have to pay for every single item to take a flight. Seating and delays sucked.

Flight was cancelled and I had to spend the night in the airport lugging my suitcase around

If you don’t check in 24 hours in advance, they will charge you $110 to check your bag instead of the $30. I did not get an email with this information and did not check in. In addition, my flight home was cancelled at layover and I had to spend the night in the airport, and then have another layover at another airport before making it home. Will not fly frontier again.

Book cheap flights from Islip to San Juan

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Islip to San Juan found on KAYAK in the last 72 hours.
6/15sáb.
1 stopFrontier
9h 14mISP-SJU
$135
6/13jue.
1 stopFrontier
13h 11mISP-SJU
$159
7/11jue.
1 stopFrontier
8h 38mISP-SJU
$164
6/14vie.
1 stopFrontier
9h 14mISP-SJU
$249
6/12mié.
1 stopFrontier
9h 14mISP-SJU
$289

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Islip - San Juan Flights

Departure:

Islip (ISP)United States

Destination:

San Juan (SJU)Puerto Rico

Return flight deals:

San Juan - Islip

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