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$99+ 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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SJU
Mar 23 — Mar 301
Sun 3/23
Sun 3/30
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 March 18, 2025.

Round-trip from

$193
(Frontier)

One-way from

$99
(Frontier)

Popular in

December

Cheapest in

September

Average price

$217
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. 7% potential increase in price ($21 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 March 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 March 18, 2025.

This Frontier deal was found by Cheapflights users on 3/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/19:04 pmISP - SJU
1 stop11h 29mFrontier
Thu 4/35:30 amSJU - ISP
1 stop7h 48mFrontier
Deal found 3/16$193
This JetBlue deal was found by Cheapflights users on 3/18. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2910:39 amISP - SJU
1 stop9h 32mJetBlue
Sat 5/38:45 amSJU - ISP
1 stop8h 05mJetBlue
Deal found 3/18$295
This Southwest deal was found by Cheapflights users on 3/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/312:25 pmISP - SJU
1 stop11h 30mSouthwest
Tue 5/68:00 amSJU - ISP
2 stops12h 20mSouthwest
Deal found 3/16$491
This Mytrip deal was found by Cheapflights users on 3/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1210:44 amISP - SJU
2 stops33h 38mMultiple Airlines
Fri 5/169:27 pmSJU - ISP
2 stops16h 18mMultiple Airlines
Deal found 3/17$517

Find flights from Islip to Puerto Rico within your budget

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 March 18, 2025.

Fly from

Islip

Fly to

Puerto Rico

Route

Depart

Return

Price

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Tue 4/1

9:04 pm-8:33 am

1 stop11h 29m

San Juan Luis Munoz Marin Intl

Thu 4/3

5:30 am-1:18 pm

1 stop7h 48m

$193

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Tue 4/29

10:39 am-8:11 pm

1 stop9h 32m

San Juan Luis Munoz Marin Intl

Sat 5/3

8:45 am-4:50 pm

1 stop8h 05m

$295

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 5/3

12:25 pm-11:55 pm

1 stop11h 30m

San Juan Luis Munoz Marin Intl

Tue 5/6

8:00 am-8:20 pm

2 stops12h 20m

$491

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 5/12

10:44 am-8:22 pm

2 stops33h 38m

San Juan Luis Munoz Marin Intl

Fri 5/16

9:27 pm-1:45 pm

2 stops16h 18m

$517

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 3/31

9:04 pm-8:33 am

1 stop11h 29m

$99

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 4/23

10:39 am-8:11 pm

1 stop9h 32m

$227

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/17

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.

Travel insights for flights from Islip to Puerto Rico

Get recent, data-driven insights about flights from Islip to Puerto Rico including ideal travel times, pricing trends, and more.

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 March is currently the most expensive (average of $346). 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 March 18, 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 March 18, 2025.
Southwest
8.1
Very good
4,281 reviews

Entertainment

7.6

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,281 reviews
Southwest
8.1
Very good
4,281 reviews

Entertainment

7.6

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
JetBlue
7.3
Good
2,937 reviews
Southwest
8.1
Very good
4,281 reviews

Entertainment

7.6

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Frontier
6.0
Okay
3,275 reviews
Southwest
8.1
Very good
4,281 reviews

Entertainment

7.6

Comfort

8.1

Crew

8.7

Food

7.1

Overall

8.1

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 March is currently the most expensive (average of $346). 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 March 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$213FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$231Average$390FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$477Average$624FlexibilityNo cancel feeOn-time63%
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