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Cheap flights from Islip (ISP) to San Juan from $139

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 5/10. 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.
ISP — SJU
May 4 — May 111
From?
To?
Sat 5/4
Sat 5/11
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 April 29, 2024.

Popular in

December

Cheapest in

July

Round-trip from

$252

One-way from

$139
High demand for flights, 64% potential price rise
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Best time to find cheap flights, 38% potential price drop
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From Islip Long Island to San Juan
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One-way flight from Islip Long Island to San Juan
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What is the cheapest day to fly round-trip from Islip, New York to San Juan?

Users have found that flying from Islip, New York to San Juan on a Friday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Islip, New York to San Juan?

To save on the cost of your flight from Islip, New York to San Juan, book at least 31 days before your planned departure. Booking around this time can save you about 23% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $342 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $424.

What is the cheapest month to fly from Islip, New York to San Juan?

Our data shows that September tends to be the cheapest month to fly to San Juan from Islip, New York. Users have commonly found prices around $336 for the month, but tickets can be as low as $85. Due to multiple factors, prepare for potentially higher prices in December.

When is the cheapest time to fly from Islip, New York to San Juan (ISP - SJU)?

A simple way to save on the total cost of your ticket is to fly from Islip, New York to San Juan in the morning. If you’re flexible enough to do this you can expect to save up to 11% on your trip compared to booking a flight at noon.

Cheap Frontier flights from Islip to San Juan

Explore cheap flight options specifically provided by Frontier for the route between Islip and San Juan. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 29, 2024.
Wed 5/86:05 pmISP - SJU
1 stop7h 51mFrontier
Sat 5/118:11 pmSJU - ISP
1 stop12h 32mFrontier
Deal found 4/27$218
Thu 5/96:05 pmISP - SJU
1 stop16h 19mFrontier
Fri 5/103:09 amSJU - ISP
1 stop29h 34mFrontier
Deal found 4/26$219
Tue 5/79:50 pmISP - SJU
1 stop12h 48mFrontier
Wed 5/88:15 pmSJU - ISP
1 stop13h 50mFrontier
Deal found 4/26$233
Tue 5/76:05 pmISP - SJU
1 stop7h 51mFrontier
Wed 5/88:15 pmSJU - ISP
1 stop13h 50mFrontier
Deal found 4/27$238
Mon 5/204:49 pmISP - SJU
1 stop9h 09mFrontier
Sat 5/2510:18 pmSJU - ISP
1 stop9h 55mFrontier
Deal found 4/28$244
Thu 5/99:50 pmISP - SJU
1 stop10h 28mFrontier
Sat 5/112:50 amSJU - ISP
1 stop10h 08mFrontier
Deal found 4/28$248
Sat 5/46:05 pmISP - SJU
1 stop7h 45mFrontier
Mon 5/63:08 amSJU - ISP
1 stop9h 40mFrontier
Deal found 4/27$258
Mon 6/174:46 pmISP - SJU
1 stop9h 14mFrontier
Mon 7/1510:23 pmSJU - ISP
1 stop10h 03mFrontier
Deal found 4/26$270
Sun 6/94:46 pmISP - SJU
1 stop9h 20mFrontier
Mon 6/173:08 amSJU - ISP
1 stop10h 13mFrontier
Deal found 4/28$274

Cheap Islip to San Juan flights in April & May 2024

Find cheap flight options from Islip to San Juan specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,944,896 searches. Prices were last updated on April 29, 2024.
Wed 5/86:05 pmISP - SJU
1 stop7h 51mFrontier
Sat 5/118:11 pmSJU - ISP
1 stop12h 32mFrontier
Deal found 4/27$218
Tue 5/79:50 pmISP - SJU
1 stop12h 48mFrontier
Wed 5/88:11 pmSJU - ISP
1 stop12h 32mFrontier
Deal found 4/28$233
Tue 5/76:05 pmISP - SJU
1 stop7h 51mFrontier
Wed 5/88:15 pmSJU - ISP
1 stop13h 50mFrontier
Deal found 4/27$238
Mon 5/204:49 pmISP - SJU
1 stop9h 09mFrontier
Sat 5/2510:18 pmSJU - ISP
1 stop9h 55mFrontier
Deal found 4/28$244
Thu 5/29:50 pmISP - SJU
1 stop10h 28mFrontier
Sat 5/188:17 pmSJU - ISP
1 stop13h 45mFrontier
Deal found 4/28$248
Tue 4/309:50 pmISP - SJU
1 stop21h 02mFrontier
Mon 5/63:08 amSJU - ISP
1 stop29h 35mFrontier
Deal found 4/28$268
Wed 5/16:05 pmISP - SJU
1 stop16h 33mFrontier
Sat 5/48:15 pmSJU - ISP
1 stop13h 50mFrontier
Deal found 4/28$281
Fri 5/39:51 pmISP - SJU
1 stop11h 57mFrontier
Fri 5/104:33 pmSJU - ISP
1 stop16h 10mFrontier
Deal found 4/28$283
Fri 5/310:32 pmISP - SJU
1 stop14h 59mFrontier
Thu 5/93:08 amSJU - ISP
1 stop18h 24mFrontier
Deal found 4/28$287

Islip to San Juan 2024 flight deals

Discover exclusive flight deals for travel between Islip and San Juan in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 29, 2024.
Wed 5/86:05 pmISP - SJU
1 stop7h 51mFrontier
Sat 5/118:11 pmSJU - ISP
1 stop12h 32mFrontier
Deal found 4/27$218
Tue 5/79:50 pmISP - SJU
1 stop12h 48mFrontier
Wed 5/88:11 pmSJU - ISP
1 stop12h 32mFrontier
Deal found 4/28$233
Tue 5/76:05 pmISP - SJU
1 stop7h 51mFrontier
Wed 5/88:15 pmSJU - ISP
1 stop13h 50mFrontier
Deal found 4/27$238
Mon 5/204:49 pmISP - SJU
1 stop9h 09mFrontier
Sat 5/2510:18 pmSJU - ISP
1 stop9h 55mFrontier
Deal found 4/28$244
Thu 5/29:50 pmISP - SJU
1 stop10h 28mFrontier
Sat 5/188:17 pmSJU - ISP
1 stop13h 45mFrontier
Deal found 4/28$248
Tue 4/309:50 pmISP - SJU
1 stop21h 02mFrontier
Mon 5/63:08 amSJU - ISP
1 stop29h 35mFrontier
Deal found 4/28$268
Sun 6/94:46 pmISP - SJU
1 stop9h 20mFrontier
Mon 6/173:08 amSJU - ISP
1 stop10h 13mFrontier
Deal found 4/28$274
Wed 5/16:05 pmISP - SJU
1 stop16h 33mFrontier
Sat 5/48:15 pmSJU - ISP
1 stop13h 50mFrontier
Deal found 4/28$281
Fri 5/39:51 pmISP - SJU
1 stop11h 57mFrontier
Fri 5/104:33 pmSJU - ISP
1 stop16h 10mFrontier
Deal found 4/28$283

Islip to San Juan flights leaving soon

Find last-minute flight options from Islip to San Juan for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 29, 2024.
Wed 5/86:05 pmISP - SJU
1 stop7h 51mFrontier
Sat 5/118:11 pmSJU - ISP
1 stop12h 32mFrontier
Deal found 4/27$218
Tue 5/79:50 pmISP - SJU
1 stop12h 48mFrontier
Wed 5/88:15 pmSJU - ISP
1 stop13h 50mFrontier
Deal found 4/26$233
Tue 5/76:05 pmISP - SJU
1 stop7h 51mFrontier
Wed 5/88:15 pmSJU - ISP
1 stop13h 50mFrontier
Deal found 4/27$238
Sat 5/47:39 pmISP - SJU
1 stop7h 44mFrontier
Sat 5/188:17 pmSJU - ISP
1 stop13h 45mFrontier
Deal found 4/28$248
Sat 5/46:05 pmISP - SJU
1 stop7h 45mFrontier
Mon 5/63:08 amSJU - ISP
1 stop9h 40mFrontier
Deal found 4/27$258
Fri 5/39:51 pmISP - SJU
1 stop11h 57mFrontier
Sat 5/42:50 amSJU - ISP
1 stop29h 04mFrontier
Deal found 4/28$289
Sun 5/56:05 pmISP - SJU
1 stop7h 51mFrontier
Mon 5/63:08 amSJU - ISP
1 stop9h 40mFrontier
Deal found 4/28$388
Sat 5/46:05 pmISP - SJU
1 stop7h 45mFrontier
Tue 5/77:43 pmSJU - ISP
1 stop13h 00mFrontier
Deal found 4/27$508
Fri 5/39:51 pmISP - SJU
1 stop11h 57mFrontier
Sun 5/57:43 pmSJU - ISP
1 stop12h 11mFrontier
Deal found 4/28$546

One-way flights to San Juan from Islip

Search for one-way flight options from Islip to San Juan. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 29, 2024.
Fri 5/106:05 pmISP - SJU
1 stop8h 14mFrontier
Deal found 4/27$139
Sat 6/294:46 pmISP - SJU
1 stop9h 14mFrontier
Deal found 4/28$219
Sat 6/224:46 pmISP - SJU
1 stop9h 14mFrontier
Deal found 4/28$249
Mon 5/274:49 pmISP - SJU
1 stop9h 09mFrontier
Deal found 4/27$419

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 2,944,896 searches. Data last updated April 29, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$218 - $298

Route

Depart

Return

Price

Islip Long IslandSan Juan Luis Munoz Marin Intl

ISP - SJU

ISPSJU

Islip Long Island

Wed 5/8

1 stop7h 51m

San Juan Luis Munoz Marin Intl

Sat 5/11

1 stop12h 32m

$218

Islip Long IslandSan Juan Luis Munoz Marin Intl

ISP - SJU

ISPSJU

Islip Long Island

Thu 5/9

1 stop16h 19m

San Juan Luis Munoz Marin Intl

Fri 5/10

1 stop29h 34m

$219

Islip Long IslandSan Juan Luis Munoz Marin Intl

ISP - SJU

ISPSJU

Islip Long Island

Mon 5/20

1 stop9h 09m

San Juan Luis Munoz Marin Intl

Sat 5/25

1 stop9h 55m

$244

Islip Long IslandSan Juan Luis Munoz Marin Intl

ISP - SJU

ISPSJU

Islip Long Island

Thu 5/9

1 stop10h 28m

San Juan Luis Munoz Marin Intl

Sat 5/11

1 stop10h 08m

$248

Islip Long IslandSan Juan Luis Munoz Marin Intl

ISP - SJU

ISPSJU

Islip Long Island

Mon 6/17

1 stop9h 14m

San Juan Luis Munoz Marin Intl

Mon 7/15

1 stop10h 03m

$270

Islip Long IslandSan Juan Luis Munoz Marin Intl

ISP - SJU

ISPSJU

Islip Long Island

Sun 6/9

1 stop9h 20m

San Juan Luis Munoz Marin Intl

Mon 6/17

1 stop10h 13m

$274

Islip Long IslandSan Juan Luis Munoz Marin Intl

ISP - SJU

ISPSJU

Islip Long Island

Sat 5/11

1 stop7h 44m

San Juan Luis Munoz Marin Intl

Tue 5/14

1 stop13h 00m

$288

Islip Long IslandSan Juan Luis Munoz Marin Intl

ISP - SJU

ISPSJU

Islip Long Island

Thu 6/13

1 stop29h 40m

San Juan Luis Munoz Marin Intl

Wed 6/19

1 stop9h 25m

$291

Islip Long IslandSan Juan Luis Munoz Marin Intl

ISP - SJU

ISPSJU

Islip Long Island

Fri 5/10

1 stop10h 17m

San Juan Luis Munoz Marin Intl

Sat 5/11

1 stop10h 08m

$298

Flights are sorted by cheapest first

Deals found on 4/27

When is the cheapest time to fly from Islip, New York to San Juan?

Use this chart to determine the cheapest time to fly round-trip from Islip to San Juan. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Islip, New York to San Juan flight should consider departing on Monday mornings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to San Juan by month

Plan your trip from Islip to San Juan by taking into account the cheapest months to travel. The average price of a one-way flight from Islip to San Juan is currently $257 while a round-trip flight costs $261. Price data was last updated on April 28, 2024.

Currently, September is the cheapest month in which you can book a flight from Islip, New York to San Juan (average of $252). Flying from Islip, New York to San Juan in March 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.

January

$278

February

$286

March

$339

April

$303

May

$282

June

$317

July

$333

August

$278

September

$252

October

$265

November

$300

December

$302

Temperature and rainfall in San Juan by month

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

SJU

Temperature

77 - 82.4 °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 April 29, 2024.
Frontier
6.3
Okay
4,123 reviews
Check prices

Overall

6.3

Food

5.2

Entertainment

4.9

Boarding

6.6

Comfort

5.8

Crew

7.1

Reviews

1 / 10

Horrific. Boarding sucked and was not ADA friendly Our flight was delayed 2 times. One of the delays was because a flight attendant was late to work. I booked a window seat- and my seat didn’t even come with a window. The crew members were in the back talking about how poorly they were treated at their job, and that most of them were staying because they had to, and couldn’t afford a career change. Overall one of the worst flights I’ve ever had, I feel bad for the employees and will never book with frontier again- not because of my poor experience- I don’t want to contribute funds to an organization that treats their workers unfairly.

Frontier
6.3
Okay
4,123 reviews
Frontier
6.3
Okay
4,123 reviews
Check prices

Overall

6.3

Food

5.2

Entertainment

4.9

Boarding

6.6

Comfort

5.8

Crew

7.1

Reviews

1 / 10

Horrific. Boarding sucked and was not ADA friendly Our flight was delayed 2 times. One of the delays was because a flight attendant was late to work. I booked a window seat- and my seat didn’t even come with a window. The crew members were in the back talking about how poorly they were treated at their job, and that most of them were staying because they had to, and couldn’t afford a career change. Overall one of the worst flights I’ve ever had, I feel bad for the employees and will never book with frontier again- not because of my poor experience- I don’t want to contribute funds to an organization that treats their workers unfairly.

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.

  • Can I find flights from Islip, New York to San Juan for under $300 on Cheapflights?

    Yes, there are multiple flights from Islip, New York to San Juan for under $300. The cheapest flight booked recently is on Frontier for just $218, but on average you can expect to pay $316.

  • Are there last-minute flights available from Islip, New York to San Juan for under $300?

    There are currently 12+ open flights from Islip, New York to San Juan within the next 7 days for less than $300.

  • What is the cheapest airline to fly from Islip, New York to San Juan round-trip?

    Currently priced at $218, 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. Frontier is currently priced 39% below the average price you’ll pay for this route.

  • What does ISP to SJU mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Islip Long Island Airport to San Juan Luis Munoz Marin Intl Airport flight would often be abbreviated as a ISP to SJU flight. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: Ponce Mercedita Airport (PSE), San Juan Isla Grande Airport (SIG), Culebra Airport (CPX), Vieques Airport (VQS), Ceiba J. Aponte de la Torre Airport (NRR).

  • Can I find deals for flights from Islip to San Juan that include extra baggage allowance?

    The amount of baggage you can bring on your Islip to San Juan flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Islip to San Juan with specific airlines?

    Yes, Cheapflights allows you to browse and filter Islip to San Juan flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from Islip to San Juan that allow pets onboard?

    Many airlines flying from Islip to San Juan offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Islip to San Juan?

    Yes, you can often find last-minute deals on Islip to San Juan flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Islip, New York to San Juan flight deals updated?

    The Islip, New York to San Juan flight deals you see on this page were last updated on 4/28.

See more FAQs

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Alternative routes for Islip to San Juan
See prices for flight routes from nearby airports that may be better suited for you.

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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 2,944,896 searches. Data last updated April 29, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$170Average$268FlexibilityNo cancel feeOn-time62%
Search Frontier flights
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Islip, New York to Pisa flights

Search flights from Islip to San Juan by cabin class

Find flights from Islip to San Juan, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Weekly flight availability from Islip to San Juan

Explore weekly flight availability from Islip to San Juan. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 29, 2024.
Sunday1daily flight
Monday0daily flights
Tuesday0daily flights
Wednesday0daily flights
Thursday0daily flights
Friday0daily flights
Saturday0daily flights

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Islip to San Juan?

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Why should you use Cheapflights to find cheap flight tickets from Islip to San Juan?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Juan from Islip.

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Yes! Cheapflights helps users easily find flights from Islip to San Juan with no change fees.

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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