HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Puerto Rico

$85+ Cheap flights from Islip, NY (ISP) to Puerto Rico

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SJU
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Islip to Puerto Rico with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Islip to Puerto Rico

Keep the following information in mind while searching for Islip to Puerto Rico flight deals. Data was last updated June 12, 2025.

Round-trip from

$167
(Priceline)

One-way from

$85
(CheapOair)

Popular in

December

Cheapest in

March

Average price

$255
From Islip Long Island to Puerto Rico
Search Deals
One-way flight from Islip Long Island to Puerto Rico
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($27 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Islip to Puerto Rico

Cheapest flights from Islip to Puerto Rico
Explore the most affordable flight options available from Islip to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Priceline deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/118:48 pmISP - SJU
1 stop11h 11mFrontier
Sat 10/1812:02 pmSJU - ISP
1 stop7h 51mFrontier
Deal found 6/10$167

Cheapflights Fare Finder

Customize your flight search to find flights from Islip to Puerto Rico that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Islip to Puerto Rico that are best for you.

Fly from

Islip

Fly to

Puerto Rico

Route

Depart

Return

Price

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 10/11

8:48 pm-7:59 am

1 stop11h 11m

San Juan Luis Munoz Marin Intl

Sat 10/18

12:02 pm-7:53 pm

1 stop7h 51m

$167

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Tue 10/14

5:37 pm-2:34 am

1 stop8h 57m

$85

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 6/25

10:38 am-8:34 pm

1 stop9h 56m

$310

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Best time to book a flight from Islip to Puerto Rico

Have a flexible travel schedule? Discover the best time to fly to Puerto Rico from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Islip to Puerto Rico

What is the cheapest month to book a flight from Islip, New York to Puerto Rico?

Currently, September is the cheapest month in which you can book a flight from Islip, New York to Puerto Rico (average of $254). Flying from Islip, New York to Puerto Rico in June is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ISP to PR?

Find hourly flight availability from Islip to Puerto Rico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Islip, New York to Puerto Rico as you normally would.

Rainfall in Puerto Rico by month

Plan your trip to Puerto Rico by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Puerto Rico ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit Puerto Rico when rainfall is around 2.2 in.

Temperature in Puerto Rico by month

Plan your trip to Puerto Rico by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Puerto Rico, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

Reviews of airlines servicing Puerto Rico

Get insights into the airlines that provide service to Puerto Rico. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Puerto Rico. Reviews last updated June 12, 2025.
JetBlue
7.3
Good
2,925 reviews

Boarding

7.5

Food

6.7

Crew

8.0

Comfort

7.6

Overall

7.3

Entertainment

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2025

JFK - CHS

Boarding took a very long time, in fact we were delayed by at least 30mins. There wasn’t many options for snacks and there was only water. The pilot did an excellent job
JetBlue
7.3
Good
2,925 reviews
JetBlue
7.3
Good
2,925 reviews

Boarding

7.5

Food

6.7

Crew

8.0

Comfort

7.6

Overall

7.3

Entertainment

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2025

JFK - CHS

Boarding took a very long time, in fact we were delayed by at least 30mins. There wasn’t many options for snacks and there was only water. The pilot did an excellent job
Frontier
5.9
Fair
3,295 reviews
JetBlue
7.3
Good
2,925 reviews

Boarding

7.5

Food

6.7

Crew

8.0

Comfort

7.6

Overall

7.3

Entertainment

7.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Feb 2025

JFK - CHS

Boarding took a very long time, in fact we were delayed by at least 30mins. There wasn’t many options for snacks and there was only water. The pilot did an excellent job

Related info for your journey

Find useful and relevant information for your journey from Islip to Puerto Rico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Islip to Puerto Rico?

    Islip Long Island (ISP), located 7.2 mi from the city center, is the airport you fly out of when you book flights from Islip to Puerto Rico.

  • Can I find deals for flights from Islip to Puerto Rico that include hotel bookings?

    Yes. In addition to deals on Islip to Puerto Rico flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Puerto Rico?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Puerto Rico.

  • Can I find deals for business class flights from Islip to Puerto Rico?

    Yes. Cheapflights offers flight deals from Islip to Puerto Rico by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to Puerto Rico?

    Currently, September is the cheapest month in which you can book a flight from Islip, New York to Puerto Rico (average of $254). Flying from Islip, New York to Puerto Rico in June is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Islip to Puerto Rico

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Luis Munoz Marin Intl flights
John F Kennedy Intl to Santiago de los Caballeros flights
John F Kennedy Intl to Santo Domingo flights
Newark to Luis Munoz Marin Intl flights
John F Kennedy Intl to Punta Cana flights
LaGuardia to Luis Munoz Marin Intl flights
Newark to Santiago de los Caballeros flights
John F Kennedy Intl to Montego Bay flights
Newark to Santo Domingo flights
Newark to Punta Cana flights
John F Kennedy Intl to Oranjestad flights
Newark to Oranjestad flights
Newark to Montego Bay flights
John F Kennedy Intl to Simpson Bay flights
LaGuardia to Punta Cana flights
John F Kennedy Intl to Kingston flights
John F Kennedy Intl to Nassau flights
LaGuardia to Montego Bay flights
LaGuardia to Oranjestad flights
Newark to Simpson Bay flights
John F Kennedy Intl to Castries flights
Newark to Nassau flights
LaGuardia to Santo Domingo flights
LaGuardia to Santiago de los Caballeros flights
John F Kennedy Intl to Bridgetown flights
Newark to Providenciales flights
John F Kennedy Intl to Saint Thomas Island flights
John F Kennedy Intl to Willemstad flights
John F Kennedy Intl to Port of Spain flights
John F Kennedy Intl to St. John's flights
LaGuardia to Nassau flights
John F Kennedy Intl to Providenciales flights
John F Kennedy Intl to Castries flights
LaGuardia to Simpson Bay flights
Newark to Saint Thomas Island flights
John F Kennedy Intl to Puerto Plata flights
John F Kennedy Intl to St. George's flights
LaGuardia to Kingston flights
Newark to Kingston flights
LaGuardia to Providenciales flights
LaGuardia to Saint Thomas Island flights
Newark to Castries flights
Newark to Bridgetown flights
Newark to Willemstad flights
John F Kennedy Intl to Aguadilla flights
Islip to Luis Munoz Marin Intl flights
John F Kennedy Intl to Ponce flights
Newark to George Town flights
White Plains to Luis Munoz Marin Intl flights
LaGuardia to Bridgetown flights

Top 3 airlines flying from Islip to Puerto Rico

Discover the top 3 airlines that operate flights from Islip to Puerto Rico. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$218FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$231Average$390FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$477Average$585FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.