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ISP - SJU

Find cheap flights from Islip to San Juan from $107

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 4/13. 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
Sun 4/28
Sun 5/5

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 46,342,885 times on KAYAK, and here is why:

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Islip to San Juan

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
10:32 pm - 10:48 amISP-SJU
12h 16m1 stop
7:57 pm - 5:05 pmSJU-ISP
21h 08m1 stop
Fri, Apr 26 - Fri, May 3
9:43 am - 11:45 amISP-SJU
26h 02m1 stop
7:57 pm - 5:05 pmSJU-ISP
21h 08m1 stop
Sat, Apr 13 - Wed, Apr 17
6:05 pm - 1:56 amISP-SJU
7h 51m1 stop
8:11 pm - 8:43 amSJU-ISP
12h 32m1 stop
$218Frontier
Find Deal
Wed, Apr 10 - Wed, Apr 17
9:43 am - 1:44 amISP-SJU
16h 01m2 stops
7:57 pm - 5:05 pmSJU-ISP
21h 08m1 stop
Sat, Apr 13 - Wed, Apr 17
9:43 am - 11:45 amISP-SJU
26h 02m1 stop
1:49 am - 5:05 pmSJU-ISP
15h 16m2 stops
Sat, Apr 13 - Tue, Apr 16
6:05 pm - 2:15 amISP-SJU
8h 10m1 stop
2:50 am - 12:52 pmSJU-ISP
10h 02m1 stop
$248Frontier
Find Deal
Thu, May 2 - Sat, May 4
9:51 pm - 9:48 amISP-SJU
11h 57m1 stop
3:08 am - 12:48 pmSJU-ISP
9h 40m1 stop
$258Frontier
Find Deal
Thu, Apr 11 - Wed, Apr 17
7:39 pm - 3:23 amISP-SJU
7h 44m1 stop
3:08 am - 8:43 amSJU-ISP
29h 35m1 stop
$264Frontier
Find Deal
Sat, Apr 13 - Tue, Apr 16
5:25 pm - 2:03 amISP-SJU
8h 38m1 stop
8:09 pm - 8:26 amSJU-ISP
12h 17m1 stop
$270Frontier
Find Deal
Tue, Jun 11 - Wed, Jun 12
9:51 pm - 9:48 amISP-SJU
11h 57m1 stop
7:43 pm - 9:18 amSJU-ISP
13h 35m1 stop
$278Frontier
Find Deal
Thu, Apr 11 - Thu, Apr 18

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.

How long does a flight from Islip to San Juan take?

There are no direct flights for this route listed on KAYAK. The shortest multi-flight duration is 7h 06m.

Good to know

Low season

May

High season

August

Cheapest flight

$107
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 $107 for a one-way ticket and $200 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

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 KAYAK reviews.
6.3
FrontierOverall score based on 4263 reviews
63overall
59comfort
52food
50entertainment
71crew
66boarding
Airline reviews

I hope to avoid flying with them in the future. First flight got cancelled then got stuck with a 13 hour layover in Denver. The process was long and frustrating to many people.

Read more about Frontier

I hope to avoid flying with them in the future. First flight got cancelled then got stuck with a 13 hour layover in Denver. The process was long and frustrating to many people.

First time flying Frontier, I am not sure the Ala Carte menu of options is for me.

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

See my previous comment which is mostly about our flight from Phoenix to SFO

Terrible. Initially we were shocked by the outrageous baggage fees we needed to pay at check in for our so-called "discounted, economy flight" - we paid over $200 (!!) for one check-in and 2 carry-on bags - this felt like a real bait-and-switch" scam. Our flight from Phoenix to SFO was delayed by 4 hours. Multiple apparent causes (from needing to make space for other planes that were landing late to problem with cabins pressure system, and whatever...). After de-boarding and re-boarding we still waited at least an hour on a cramped, poorly ventilated plane before take-off. Seats were cramped, uncomfortable - did not recline at all. No water until we were flying for a while. No complimentary snacks. Upon arrival at SFO my luggage was sent upstairs to the check-in counter. The customer service person there refused to let me examine a bunch of bags that were sitting on a nearby cart because it was "behind the counter", rather made me wait until another attendant did an exhaustive and failed (?computer) search, came back and told me they were unable to locate my bag. I asked her to look on the cart, lo and behold, there was my bag just a few feet away! Missed my choir rehearsal that evening due to all of the delays. One more thing, a few days later my husband and I tested positive for Covid. Since we both are fully vaccinated, careful about masking and have never had Covid previously, we will never know, but suspect we may have acquired the infection during the prolonged wait on your poorly ventilated plane (person in the row in front of us was coughing). After registering a complaint, we received a measly $50 voucher for future flights. Needless to say we have no intention of flying with Frontier Airlines ever again.

I liked getting off the plane. Everything else was well below standards. Not even offering a bag of peanuts for free for a 4 hours flight is ridiculous.

The whole experience was bad. Didn't know no complimentary drinks or snacks. $4.39 for a soda is ridiculous even a bottle water. A carry on was $74 just crazy. I don't think I will take this airline ever again. Very bad

Delayed...attendants checked every single bag and item for sizes before boarding.

There was no wifi, there was no usb charger on the planes Frontier lowered the weight limit on suitcases from 50 to 40 pounds Frontier now charges for a seat...really? If i don't pay for a basic seat, do i stand the whole flight? Frontier now charges for the carry on, just like for the checked suitcase The bundle pricing is way over priced.

I am HIGHLY unhappy with the amount of money I spent on the flight. Paid in advance only to find the flight at a discount price a week or so before the flight. I will not fly frontier again and have bad mouthed your business since to anyone I have spoken with about flying (which has been many a people). Crew was mediocre and instead of moving me to a spot where I could gain some leg room they sat their flight attendant there. Won’t be flying frontier in the future.

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.
4/13Sat
1 stop
26h 02mISP-SJU
$107
4/6Sat
1 stopFrontier
7h 52mISP-SJU
$109
4/13Sat
2 stops
16h 01mISP-SJU
$134
4/13Sat
3 stops
22h 51mISP-SJU
$156
4/3Wed
1 stopFrontier
7h 52mISP-SJU
$595

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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.
4/2Tue
multi-stop
20h 18mISP-SJU
4/9Tue
multi-stop
20h 59mSJU-ISP
$371
4/2Tue
multi-stop
20h 18mISP-SJU
4/9Tue
multi-stop
20h 59mSJU-ISP
$372
4/2Tue
multi-stop
16h 13mISP-SJU
4/9Tue
multi-stop
20h 59mSJU-ISP
$381
4/2Tue
multi-stop
7h 54mISP-SJU
4/8Mon
multi-stop
28h 58mSJU-ISP
$407
4/2Tue
multi-stop
16h 13mISP-SJU
4/9Tue
multi-stop
11h 46mSJU-ISP
$456
3/30Sat
multi-stopFrontier
16h 38mISP-SJU
3/31Sun
multi-stopFrontier
12h 02mSJU-ISP
$523
4/2Tue
multi-stop
14h 03mISP-SJU
4/8Mon
multi-stop
14h 03mSJU-ISP
$662
4/1Mon
multi-stopFrontier
12h 52mISP-SJU
4/4Thu
multi-stopFrontier
10h 30mSJU-ISP
$714
4/1Mon
multi-stopFrontier
12h 52mISP-SJU
4/5Fri
multi-stopFrontier
12h 12mSJU-ISP
$744

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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

Cabin classes: