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San Juan

$118+ Cheap flights from Islip, NY (ISP) to San Juan

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SJU
Feb 28 — Mar 71
Fri 2/28
Fri 3/7
1 adult, Economy
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Cheap flight deals from Islip to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 23, 2025.

Round-trip from

$118
(Frontier)

Popular in

October

Cheapest in

November

Average price

$215
From Islip Long Island to San Juan
Search Deals
High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 7% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find flight deals from Islip to San Juan

Cheapest flights from Islip to San Juan
Explore the most affordable flight options available from Islip to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 23, 2025.

This Frontier deal was found by Cheapflights users on 2/22. 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.
Mon 4/282:08 pmISP - SJU
1 stop12h 41mFrontier
Tue 5/69:30 pmSJU - ISP
1 stop12h 42mFrontier
Deal found 2/22$118
This Mytrip deal was found by Cheapflights users on 2/22. 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.
Sun 3/3010:50 amISP - SJU
3 stops29h 44mMultiple Airlines
Fri 4/46:00 amSJU - ISP
3 stops31h 55mMultiple Airlines
Deal found 2/22$324
This JetBlue deal was found by Cheapflights users on 2/22. 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.
Wed 3/121:34 pmISP - SJU
1 stop7h 11mJetBlue
Mon 3/174:30 amSJU - ISP
1 stop7h 50mJetBlue
Deal found 2/22$332
This Southwest deal was found by Cheapflights users on 2/22. 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.
Sun 3/305:50 amISP - SJU
2 stops10h 20mSouthwest
Fri 4/410:45 amSJU - ISP
2 stops12h 55mSouthwest
Deal found 2/22$491

Find flights from Islip to San Juan within your budget

Customize your flight search to find flights from Islip to San Juan 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 February 23, 2025.

Fly from

Islip

Fly to

San Juan

Route

Depart

Return

Price

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 4/28

2:08 pm-2:49 am

1 stop12h 41m

San Juan Luis Munoz Marin Intl

Tue 5/6

9:30 pm-10:12 am

1 stop12h 42m

$118

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sun 3/30

10:50 am-4:34 pm

3 stops29h 44m

San Juan Luis Munoz Marin Intl

Thu 4/3

3:05 am-1:55 pm

3 stops34h 50m

$301

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 3/12

1:34 pm-8:45 pm

1 stop7h 11m

San Juan Luis Munoz Marin Intl

Mon 3/17

4:30 am-12:20 pm

1 stop7h 50m

$332

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sun 3/30

5:50 am-4:10 pm

2 stops10h 20m

San Juan Luis Munoz Marin Intl

Fri 4/4

10:45 am-11:40 pm

2 stops12h 55m

$491

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 4/16

9:44 am-4:40 pm

1 stop6h 56m

$164

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 4/17

1:00 pm-9:05 pm

2 stops8h 05m

$288

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/22

Best time to book a flight from Islip to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan 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 San Juan

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

What is the cheapest month to book a flight from Islip, New York to San Juan?

Currently, September is the cheapest month in which you can book a flight from Islip, New York to San Juan (average of $254). Flying from Islip, New York to San Juan in March is currently the most expensive (average of $363). 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 SJU?

Find hourly flight availability from Islip to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 23, 2025.

A simple way to save on the total cost of your ticket is to fly from Islip, New York to San Juan in the evening. If you’re flexible enough to do this you can expect to save up to 47% on your trip compared to booking a flight in the afternoon.

Rainfall in San Juan by month

Plan your trip to San Juan by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan 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 San Juan when rainfall is around 2.2 in.

Temperature in San Juan by month

Plan your trip to San Juan by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan, 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 San Juan

Get insights into the airlines that provide service to San Juan. 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 San Juan. Reviews last updated February 23, 2025.
See what other customers who have flown with Southwest, JetBlue and Frontier from Islip to San Juan have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.7

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,395 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.7

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

JetBlue
7.4
Good
3,068 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.7

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Frontier
6.0
Okay
3,352 reviews
Southwest
8.1
Very good
4,395 reviews

Entertainment

7.6

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.7

Comfort

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Related info for your journey

Find useful and relevant information for your journey from Islip to San Juan. 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 San Juan?

    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 San Juan. 1 airline have flights from Long Island to San Juan on a regular basis. Booking flights from Islip Long Island to San Juan should not be difficult; the airport handles an average of 0 outbound flights to San Juan per day.

  • What are the cheapest airlines flying from Islip, New York to San Juan round-trip?

    Currently priced at $118, Frontier will fly you from Islip, New York to San Juan and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from JetBlue and Southwest - these airlines can fly you to your destination from $332 and $491, respectively. Frontier is currently priced 70% below the average price you’ll pay for this route.

  • Can I find deals for flights from Islip to San Juan that include hotel bookings?

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

  • How can I find direct flights from Islip to San Juan?

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

  • Can I find deals for business class flights from Islip to San Juan?

    Yes. Cheapflights offers flight deals from Islip to San Juan 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 San Juan?

    Currently, September is the cheapest month in which you can book a flight from Islip, New York to San Juan (average of $254). Flying from Islip, New York to San Juan in March is currently the most expensive (average of $363). 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.

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Alternative routes for Islip to San Juan

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Top airline flying from Islip to San Juan

Discover the top airline that operate flights from Islip to San Juan. 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 February 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$239FlexibilityNo cancel feeOn-time62%
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