What are the cheapest airlines to fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport one-way?

One-way options have recently been found by users for as low as $98 on Frontier. Other airlines that offer cheap prices include Southwest from $258 and JetBlue from $279 one-way.

What is the cheapest day to fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

Travelers seeking maximum savings on their Islip, New York to San Juan Luis Munoz Marin Intl Airport flight should consider departing on Wednesday mornings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Juan Luis Munoz Marin Intl Airport 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 Luis Munoz Marin Intl Airport when rainfall is around 2.2 in.

If weather is an important factor for your trip to San Juan Luis Munoz Marin Intl Airport, 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).

What are the most popular airlines that fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

Before booking your flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport check out the most popular airlines for this route: JetBlue, Frontier or Southwest.

What is the cheapest day to fly round-trip from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

Users have found that flying from Islip, New York to San Juan Luis Munoz Marin Intl Airport on a Saturday 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 Luis Munoz Marin Intl Airport?

To save on the cost of your flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport, book at least 28 days before your planned departure. Booking around this time can save you about 18% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $234 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $304.

What is the cheapest month to fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

Our data shows that March tends to be the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport from Islip, New York. Users have commonly found prices around $267 for the month, but tickets can be as low as $79. Due to multiple factors, prepare for potentially higher prices in December.

What airport do you fly from for flights from Islip to San Juan Luis Munoz Marin Intl?

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 Luis Munoz Marin Intl. 3 airlines have flights from Long Island to San Juan Luis Munoz Marin Intl on a regular basis. Booking flights from Islip Long Island to San Juan Luis Munoz Marin Intl should not be difficult; the airport handles an average of 0 outbound flights to San Juan Luis Munoz Marin Intl per day.

Can I find deals for flights from Islip to Luis Munoz Marin Intl that include hotel bookings?

Yes. In addition to deals on Islip to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Islip to Luis Munoz Marin Intl?

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

Can I find deals for business class flights from Islip to Luis Munoz Marin Intl?

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

$98+ Flights from Islip, NY to San Juan Luis Munoz Marin Intl Airport

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Cheap flight deals from Islip to Luis Munoz Marin Intl

Round-trip from	$206 (Cheapflightsfares)
One-way from	$98 (Cheapflightsfares)
Popular in	October
Cheapest in	November
Average price	$368

From Islip Long Island to San Juan Luis Munoz Marin Intl

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One-way flight from Islip Long Island to San Juan Luis Munoz Marin Intl

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Highest demand for flights based on searches. 5% potential increase in price ($26 potential increase over avg. RT price).

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Cheapest flight prices on average. 5% potential price decrease ($25 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 Luis Munoz Marin Intl

Cheapest flights from Islip to Luis Munoz Marin Intl
Explore the most affordable flight options available from Islip to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Sat 8/307:33 pmISP - SJU

1 stop7h 17mFrontier

Fri 9/53:39 amSJU - ISP

1 stop7h 16mFrontier

Deal found 7/29

$206

Best flights from Islip to Luis Munoz Marin Intl
Discover carefully curated flight deals from Islip to Luis Munoz Marin Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Sat 8/307:33 pmISP - SJU

1 stop7h 17mFrontier

Fri 9/53:39 amSJU - ISP

1 stop7h 16mFrontier

Deal found 7/29

$206

Last-minute flights from Islip to Luis Munoz Marin Intl
Discover last-minute flight deals from Islip to Luis Munoz Marin Intl. Data last updated July 29, 2025 and is based on user searches.

Sun 8/31:20 pmISP - SJU

1 stop9h 55mSouthwest

Wed 8/1311:50 amSJU - ISP

2 stops10h 15mSouthwest

Deal found 7/26

$625

Sun 8/312:35 pmISP - SJU

1 stop10h 32mJetBlue

Sat 8/96:01 amSJU - ISP

1 stop6h 25mJetBlue

Deal found 7/27

$867

Wed 8/62:12 pmISP - SJU

2 stops35h 23mMultiple Airlines

Sat 8/91:37 amSJU - ISP

3 stops17h 22mMultiple Airlines

Deal found 7/29

$912

Fri 8/88:37 pmISP - SJU

1 stop12h 22mFrontier

Sat 8/912:08 pmSJU - ISP

1 stop7h 34mFrontier

Deal found 7/28

$223

Sat 8/307:33 pmISP - SJU

1 stop7h 17mFrontier

Fri 9/53:39 amSJU - ISP

1 stop7h 16mFrontier

Deal found 7/29

$206

One-way flights from Islip to Luis Munoz Marin Intl
Search for one-way flight options from Islip to Luis Munoz Marin Intl. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Sat 8/307:33 pmISP - SJU

1 stop7h 17mFrontier

Deal found 7/27

$98

Sat 8/235:40 amISP - SJU

2 stops11h 20mSouthwest

Deal found 7/27

$258

Fri 8/1511:40 amISP - SJU

1 stop8h 54mJetBlue

Deal found 7/28

$279

Cheapflights Fare Finder

Use the filters below to find and compare flights from Islip to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 8/30

7:33 pm-2:50 am

1 stop7h 17m

San Juan Luis Munoz Marin Intl

Fri 9/5

3:39 am-10:55 am

1 stop7h 16m

$206

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 8/30

7:33 pm-2:50 am

1 stop7h 17m

$98

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 8/23

5:40 am-5:00 pm

2 stops11h 20m

$258

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 8/15

11:40 am-8:34 pm

1 stop8h 54m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from Islip to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl 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 San Juan Luis Munoz Marin Intl Airport

What is the cheapest month to book a flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

Currently, September is the cheapest month in which you can book a flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Islip, New York to San Juan Luis Munoz Marin Intl Airport 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 SJU?

A simple way to save on the total cost of your ticket is to fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport 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.

Reviews of airlines servicing Luis Munoz Marin Intl

Read through reviews of airlines operating flights from Islip to San Juan Luis Munoz Marin Intl Airport, such as Southwest, JetBlue, and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Southwest

8.0

Very good

4,238 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

JetBlue

7.3

Good

2,913 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Frontier

5.9

Fair

3,238 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Related info for your journey

What airport do you fly from for flights from Islip to San Juan Luis Munoz Marin Intl?
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 Luis Munoz Marin Intl. 3 airlines have flights from Long Island to San Juan Luis Munoz Marin Intl on a regular basis. Booking flights from Islip Long Island to San Juan Luis Munoz Marin Intl should not be difficult; the airport handles an average of 0 outbound flights to San Juan Luis Munoz Marin Intl per day.
What is the cheapest airline to fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport round-trip?
According to our current data, Frontier ($206), offers the cheapest pricing from Islip, New York to San Juan Luis Munoz Marin Intl Airport. Users have found that Frontier is 53% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport one-way?
One-way options have recently been found by users for as low as $98 on Frontier. Other airlines that offer cheap prices include Southwest from $258 and JetBlue from $279 one-way.
Can I find deals for flights from Islip to Luis Munoz Marin Intl that include hotel bookings?
Yes. In addition to deals on Islip to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Islip to Luis Munoz Marin Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Luis Munoz Marin Intl.
Can I find deals for business class flights from Islip to Luis Munoz Marin Intl?
Yes. Cheapflights offers flight deals from Islip to Luis Munoz Marin Intl 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 Luis Munoz Marin Intl Airport?
Currently, September is the cheapest month in which you can book a flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Islip, New York to San Juan Luis Munoz Marin Intl Airport 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

Dorado

Fajardo

Rio Grande

Luquillo

Humacao

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Islip to Luis Munoz Marin Intl

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$59	Average$218	FlexibilityNo cancel fee	On-time62%
JetBlue	Cheapest$231	Average$390	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$477	Average$563	FlexibilityNo cancel fee	On-time63%

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$98+ Cheap flights from Islip, NY (ISP) to Luis Munoz Marin Intl (SJU)

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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Islip to Luis Munoz Marin Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Islip to Luis Munoz Marin Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Islip to Luis Munoz Marin Intl

Cheapest flights from Islip to Luis Munoz Marin IntlExplore the most affordable flight options available from Islip to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from Islip to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Islip to San Juan Luis Munoz Marin Intl Airport that are best for you.

Best time to book a flight from Islip to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Islip with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Islip to San Juan Luis Munoz Marin Intl Airport

What is the cheapest month to book a flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

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

Find hourly flight availability from Islip to Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

Reviews of airlines servicing Luis Munoz Marin Intl

Read through reviews of airlines operating flights from Islip to San Juan Luis Munoz Marin Intl Airport, such as Southwest, JetBlue, and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Islip to Luis Munoz Marin Intl. 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 Luis Munoz Marin Intl?

What is the cheapest airline to fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport round-trip?

What are the cheapest airlines to fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport one-way?

Can I find deals for flights from Islip to Luis Munoz Marin Intl that include hotel bookings?

How can I find direct flights from Islip to Luis Munoz Marin Intl?

Can I find deals for business class flights from Islip to Luis Munoz Marin Intl?

What is the cheapest month to book a flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

Traveling to a place near San Juan Luis Munoz Marin Intl Airport?

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 Luis Munoz Marin Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top 3 airlines flying from Islip to Luis Munoz Marin Intl

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Cheapest flights from Islip to Luis Munoz Marin Intl
Explore the most affordable flight options available from Islip to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.