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$84+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SJU
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
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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 July 2, 2025.

Round-trip from

$220
(Cheapflightsfares)

One-way from

$142
(Frontier)

Popular in

December

Cheapest in

March

Average price

$293
From Islip Long Island to Puerto Rico
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One-way flight from Islip Long Island to Puerto Rico
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Highest demand for flights based on searches. 9% potential increase in price ($27 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 2, 2025.

This CheapOair deal was found by Cheapflights users on 6/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/158:00 amISP - SJU
1 stop18h 39mFrontier
Fri 7/2510:04 amSJU - ISP
1 stop9h 38mFrontier
Deal found 6/29$213

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 July 2, 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

Tue 7/15

8:00 am-2:39 am

1 stop18h 39m

San Juan Luis Munoz Marin Intl

Fri 7/25

10:04 am-7:42 pm

1 stop9h 38m

$213

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 8/25

7:27 pm-2:50 am

1 stop7h 23m

$84

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sun 8/17

12:35 pm-11:07 pm

1 stop10h 32m

$158

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 8/20

12:30 pm-10:45 pm

2 stops10h 15m

$241

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 9/11

7:36 pm-12:44 am

3 stops29h 08m

$401

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

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 July 2, 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.

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 July 2, 2025.
Get a feel of what it's like to fly with Southwest, JetBlue, and Frontier from Islip to Puerto Rico by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,272 reviews

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,272 reviews
Southwest
8.0
Very good
4,272 reviews

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,918 reviews
Southwest
8.0
Very good
4,272 reviews

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Frontier
5.9
Fair
3,290 reviews
Southwest
8.0
Very good
4,272 reviews

Boarding

8.2

Overall

8.0

Comfort

8.0

Crew

8.6

Entertainment

7.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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.

  • What are the cheapest airlines to fly from Islip, New York to Puerto Rico one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $142. However, be on the lookout for offers from JetBlue and Southwest, as they are both options that can get you from Islip, New York to Puerto Rico for a low price.

  • 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

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Alternative routes for Islip to Puerto Rico

See prices for flight routes from nearby airports that may be better suited for you.
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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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$218FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$231Average$390FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$477Average$585FlexibilityNo cancel feeOn-time63%

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