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ISP - SJU

$135 Find cheap flights from Islip to San Juan

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 6/25. 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
Sat 6/8
Sat 6/15

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 43,968,530 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

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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
5:25 pm - 2:03 amISP-SJU
8h 38m1 stop
8:09 pm - 8:26 amSJU-ISP
12h 17m1 stop
$264Frontier
Find Deal
Thu, Aug 22 - Mon, Aug 26
4:46 pm - 2:05 amISP-SJU
9h 19m1 stop
3:08 am - 7:40 amSJU-ISP
28h 32m1 stop
$281Frontier
Find Deal
Sun, Jun 16 - Wed, Jun 19
4:49 pm - 2:09 amISP-SJU
9h 20m1 stop
8:32 pm - 8:13 amSJU-ISP
11h 41m1 stop
$288Frontier
Find Deal
Tue, May 21 - Tue, May 28
5:25 pm - 2:03 amISP-SJU
8h 38m1 stop
10:23 pm - 8:26 amSJU-ISP
10h 03m1 stop
$294Frontier
Find Deal
Fri, Jul 12 - Mon, Jul 15
4:46 pm - 1:53 amISP-SJU
9h 07m1 stop
3:08 am - 7:40 amSJU-ISP
28h 32m1 stop
$298Frontier
Find Deal
Thu, Jun 27 - Mon, Jul 1
9:55 am - 9:45 amISP-SJU
23h 50m1 stop
3:08 am - 8:26 amSJU-ISP
29h 18m1 stop
$303Frontier
Find Deal
Fri, Jul 12 - Sun, Jul 14
4:46 pm - 2:05 amISP-SJU
9h 19m1 stop
9:45 am - 10:29 amSJU-ISP
24h 44m1 stop
$305Frontier
Find Deal
Sun, Jun 16 - Thu, Jun 20
9:42 pm - 10:47 amISP-SJU
13h 05m1 stop
3:08 am - 1:57 pmSJU-ISP
10h 49m1 stop
$328Frontier
Find Deal
Tue, May 21 - Sat, Jul 13
5:47 pm - 9:12 pmISP-SJU
27h 25m3 stops
2:30 am - 5:07 pmSJU-ISP
14h 37m2 stops
Fri, Jul 12 - Sun, Jul 14
1:57 pm - 11:41 amISP-SJU
21h 44m2 stops
2:30 am - 5:07 pmSJU-ISP
14h 37m2 stops
Fri, Jul 12 - Sun, Jul 14

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 February, where the average cost of tickets is $452 and $370 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

November

High season

August

Cheapest flight

$135
Best time to beat the crowds with an average 59% drop in price.
Most popular time to fly and prices are also 23% 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 $264 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.
6.2
FrontierOverall score based on 4088 reviews
5.8Comfort
6.6Boarding
4.9Entertainment
7.1Crew
5.2Food
Airline reviews

I checked a bag because it was $5 less than carry on. They managed to lose my bag on a 2.5 hr direct flight! Frontier has no airport staff at baggage claim to help. As soon as I got home around 11 pm I tried to use their online system to file the claim for lost bag - system wouldn't take the # on my baggage claim ticket - said it was not the correct number. Also said that I had not checked a bag, which wasn't true - even my online boarding pass showed that I had checked a bag. Wasted about an hour on that process with no luck. Tried again in the morning - same thing. So tried online chat with Frontier bot - waited 35-40" twice to be connected to a baggage agent and it never happened. Eventually drove to PDX after work and waited 2 hrs for the Frontier ticket agents to arrive prior to the next Frontier flight out of PDX and FINALLY got some help from one of them, to take me to lost luggage area where I was able to retrive my bag. Probably took 4-5 hrs. of my time and endless frustration to get my bag. This was my first -- and LAST -- experience flying Frontier Airlines. Check-in was also extremely difficult and time consuming. The flight itself (and staff) were fine but everything else about the experience was a total disaster! The fact that Frontier literally has NO WAY to connect to a human voice for customer service (in this case for lost luggage) is the WORST!!!!!

2.0 MediocreJudi, May 2024PHX - PDX
Read more about Frontier reviews

I checked a bag because it was $5 less than carry on. They managed to lose my bag on a 2.5 hr direct flight! Frontier has no airport staff at baggage claim to help. As soon as I got home around 11 pm I tried to use their online system to file the claim for lost bag - system wouldn't take the # on my baggage claim ticket - said it was not the correct number. Also said that I had not checked a bag, which wasn't true - even my online boarding pass showed that I had checked a bag. Wasted about an hour on that process with no luck. Tried again in the morning - same thing. So tried online chat with Frontier bot - waited 35-40" twice to be connected to a baggage agent and it never happened. Eventually drove to PDX after work and waited 2 hrs for the Frontier ticket agents to arrive prior to the next Frontier flight out of PDX and FINALLY got some help from one of them, to take me to lost luggage area where I was able to retrive my bag. Probably took 4-5 hrs. of my time and endless frustration to get my bag. This was my first -- and LAST -- experience flying Frontier Airlines. Check-in was also extremely difficult and time consuming. The flight itself (and staff) were fine but everything else about the experience was a total disaster! The fact that Frontier literally has NO WAY to connect to a human voice for customer service (in this case for lost luggage) is the WORST!!!!!

Frontier is a crappy airline nothing about it is honest

I didn't get to do this flight l, hard to review

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

Didn't like anything!! Horrible flight. Small seating area and hard seats. Butt was sore after 2 hour flight to Seattle No entertainment or free refreshments No wifi or USB charging receptacles to charge phone entoute like other airliners Luggage rates were 3 times as much as competitors. Difficult to navigate online luggue process to pre pay before flight Overall bad experience WILL NEVER RIDE OR RECOMMEND FRONTIER TO FRIENDS OR FAMILY MEMBERS!!! THIS IS A SHAME!! MOST MESERIBLE FLIGHT OF MY LIFE!! AND I THOUGHT SPIRIT WAS 👎 YOU GOT THEM BEAD HANDS DOWN!!

Flight was a little late taking off. Seats are too upright, no ports to charge devices, no wifi, no entertainment

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

Flight was canceled with little warning. Flight was rebooked through Ontario, California and connecting flight was delayed by over three hours. Frontier is living up to their Greyhound of the skies reputation for sure.

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.

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.
6/25Tue
1 stopFrontier
10h 29mISP-SJU
$135
8/4Sun
1 stopFrontier
12h 43mISP-SJU
$159
6/22Sat
1 stopFrontier
9h 13mISP-SJU
$219
5/28Tue
1 stopFrontier
13h 05mISP-SJU
$249
6/29Sat
1 stopFrontier
9h 13mISP-SJU
$289
11/1Fri
1 stopFrontier
8h 38mISP-SJU
$339
6/19Wed
1 stopFrontier
9h 13mISP-SJU
$694

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Last minute flights from Islip to San Juan

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Islip to San Juan that are departing in the next 10 days.
5/14Tue
multi-stopFrontier
12h 48mISP-SJU
5/15Wed
multi-stopFrontier
12h 02mSJU-ISP
$179
5/14Tue
multi-stopFrontier
7h 51mISP-SJU
5/18Sat
multi-stopFrontier
11h 55mSJU-ISP
$244
5/13Mon
multi-stopFrontier
13h 43mISP-SJU
5/17Fri
multi-stopFrontier
12h 25mSJU-ISP
$248
5/14Tue
multi-stopFrontier
12h 48mISP-SJU
5/15Wed
multi-stopFrontier
12h 02mSJU-ISP
$253
5/12Sun
multi-stopFrontier
11h 57mISP-SJU
5/19Sun
multi-stopFrontier
11h 41mSJU-ISP
$278
5/14Tue
multi-stopFrontier
29h 45mISP-SJU
5/17Fri
multi-stopFrontier
28h 58mSJU-ISP
$296
5/12Sun
multi-stop
12h 54mISP-SJU
5/19Sun
multi-stop
22h 33mSJU-ISP
$777
5/12Sun
multi-stop
12h 54mISP-SJU
5/19Sun
multi-stop
18h 57mSJU-ISP
$792
5/12Sun
multi-stop
22h 27mISP-SJU
5/19Sun
multi-stop
18h 57mSJU-ISP
$854

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Islip - San Juan Flights

Departure:

Islip (undefined)United States

Destination:

San Juan (SJU)Puerto Rico

Return flight deals:

San Juan - Islip

Cabin classes: