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Cheap flights from Islip, New York to Puerto Rico from $90

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Puerto Rico departing on 2/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip, New York to Puerto Rico

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:41 pm - 9:55 am
ISP
-
SJU
13h 14m1 stop
Frontier Logo
3:55 am - 10:40 am
SJU
-
ISP
7h 45m1 stop
$180Frontier
Mon, Mar 2 - Tue, Mar 3
Frontier Logo
7:56 pm - 8:54 am
ISP
-
SJU
11h 58m1 stop
Frontier Logo
9:04 pm - 8:09 pm
SJU
-
ISP
24h 05m1 stop
$181Frontier
Sat, Jan 10 - Thu, Jan 15
Frontier Logo
6:00 am - 8:58 am
ISP
-
SJU
25h 58m1 stop
Frontier Logo
8:00 am - 8:40 am
SJU
-
ISP
25h 40m1 stop
$193Frontier
Thu, Jan 1 - Sat, Jan 31
Frontier Logo
7:56 pm - 8:54 am
ISP
-
SJU
11h 58m1 stop
Frontier Logo
7:34 pm - 8:55 am
SJU
-
ISP
14h 21m1 stop
$200Frontier
Sat, Jan 10 - Sat, Jan 17
Frontier Logo
7:41 pm - 9:55 am
ISP
-
SJU
13h 14m1 stop
Frontier Logo
3:55 am - 10:40 am
SJU
-
ISP
7h 45m1 stop
$201Frontier
Sat, Feb 28 - Sun, Mar 1
Frontier Logo
8:24 pm - 11:16 am
ISP
-
SJU
13h 52m1 stop
Frontier Logo
9:23 pm - 10:46 pm
SJU
-
ISP
26h 23m1 stop
$202Frontier
Mon, Jan 5 - Mon, Jan 12
Frontier Logo
3:34 pm - 2:53 am
ISP
-
SJU
10h 19m1 stop
Frontier Logo
6:30 am - 12:47 pm
SJU
-
ISP
7h 17m1 stop
$215Frontier
Mon, Mar 2 - Fri, Mar 6
Frontier Logo
3:34 pm - 12:43 am
ISP
-
SJU
8h 09m1 stop
Frontier Logo
2:07 pm - 1:13 pm
SJU
-
ISP
24h 06m1 stop
$216Frontier
Fri, Feb 20 - Tue, Feb 24
Frontier Logo
6:47 pm - 2:23 pm
ISP
-
SJU
18h 36m1 stop
Frontier Logo
8:00 am - 8:40 am
SJU
-
ISP
25h 40m1 stop
$221Frontier
Sat, Jan 17 - Sat, Jan 24
Frontier Logo
7:43 pm - 10:24 am
ISP
-
SJU
13h 41m1 stop
Frontier Logo
11:15 am - 6:48 pm
SJU
-
ISP
8h 33m1 stop
$232Frontier
Thu, Jan 22 - Mon, Jan 26

Frontier flights from Islip, New York to Puerto Rico

Our best Frontier deals on Islip, New York to Puerto Rico flight tickets
Frontier
Mar 2
ISP7:41 pmIslip Long Island
13h 14m
1 stop
SJU9:55 amSan Juan Luis Munoz Marin Intl
Mar 3
SJU3:55 amSan Juan Luis Munoz Marin Intl
7h 45m
1 stop
ISP10:40 amIslip Long Island
$180
Find similar
Frontier
Jan 8
ISP8:40 pmIslip Long Island
29h 10m
1 stop
SJU2:50 amSan Juan Luis Munoz Marin Intl
Jan 15
SJU9:04 pmSan Juan Luis Munoz Marin Intl
24h 05m
1 stop
ISP8:09 pmIslip Long Island
$181
Find similar
Frontier
Jan 1
ISP6:00 amIslip Long Island
25h 58m
1 stop
SJU8:58 amSan Juan Luis Munoz Marin Intl
Jan 31
SJU8:00 amSan Juan Luis Munoz Marin Intl
25h 40m
1 stop
ISP8:40 amIslip Long Island
$193
Find similar

JetBlue flights from Islip, New York to Puerto Rico

Our best JetBlue deals on Islip, New York to Puerto Rico flight tickets
JetBlue
Jan 27
ISP12:25 pmIslip Long Island
6h 37m
1 stop
SJU8:02 pmSan Juan Luis Munoz Marin Intl
Jan 30
SJU6:01 amSan Juan Luis Munoz Marin Intl
6h 32m
1 stop
ISP11:33 amIslip Long Island
$310
Find similar
JetBlue
Feb 7
ISP11:00 amIslip Long Island
7h 19m
1 stop
SJU7:19 pmSan Juan Luis Munoz Marin Intl
Feb 13
SJU8:00 pmSan Juan Luis Munoz Marin Intl
13h 40m
1 stop
ISP8:40 amIslip Long Island
$319
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York 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, momondo users made 832,500 searches. Data last updated December 11, 2025.
Use the filters below to find and compare flights from Islip, New York to Puerto Rico that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 3/2

7:41 pm-9:55 am

1 stop13h 14m

San Juan Luis Munoz Marin Intl

Tue 3/3

3:55 am-10:40 am

1 stop7h 45m

$180

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 1/10

7:56 pm-8:54 am

1 stop11h 58m

San Juan Luis Munoz Marin Intl

Thu 1/15

9:04 pm-8:09 pm

1 stop24h 05m

$181

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 1/1

6:00 am-8:58 am

1 stop25h 58m

San Juan Luis Munoz Marin Intl

Sat 1/31

8:00 am-8:40 am

1 stop25h 40m

$193

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 1/10

7:56 pm-8:54 am

1 stop11h 58m

San Juan Luis Munoz Marin Intl

Sat 1/17

7:34 pm-8:55 am

1 stop14h 21m

$200

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 2/28

7:41 pm-9:55 am

1 stop13h 14m

San Juan Luis Munoz Marin Intl

Sun 3/1

3:55 am-10:40 am

1 stop7h 45m

$201

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 1/5

8:24 pm-11:16 am

1 stop13h 52m

San Juan Luis Munoz Marin Intl

Mon 1/12

9:23 pm-10:46 pm

1 stop26h 23m

$202

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 3/2

3:34 pm-2:53 am

1 stop10h 19m

San Juan Luis Munoz Marin Intl

Fri 3/6

6:30 am-12:47 pm

1 stop7h 17m

$215

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 2/20

3:34 pm-12:43 am

1 stop8h 09m

San Juan Luis Munoz Marin Intl

Tue 2/24

2:07 pm-1:13 pm

1 stop24h 06m

$216

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 1/17

6:47 pm-2:23 pm

1 stop18h 36m

San Juan Luis Munoz Marin Intl

Sat 1/24

8:00 am-8:40 am

1 stop25h 40m

$221

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 1/22

7:43 pm-10:24 am

1 stop13h 41m

San Juan Luis Munoz Marin Intl

Mon 1/26

11:15 am-6:48 pm

1 stop8h 33m

$232

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Puerto Rico from

How to get the cheapest flight ticket from Islip, New York to Puerto Rico

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Puerto Rico?

If you don’t want to visit Puerto Rico in February, then you should wait until April to fly from Islip, New York, when ticket prices are also cheap, with an average price of $299.

What is the cheapest day to depart on your flight to Puerto Rico?

On average, the least expensive day to fly to Puerto Rico from Islip, New York is on a Friday. momondo users have found tickets for Friday departures for as low as $260. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Puerto Rico is Sunday, with ticket prices averaging around $734.

What is the cheapest time of day to depart on your flight to Puerto Rico?

Our most recent data shows that the best time of day to fly to Puerto Rico is in the evening. Flights from Islip, New York to Puerto Rico during this time can be as low as $208. In contrast, the most expensive time of day to depart to Puerto Rico is in the afternoon when prices are around $390.

Can stopping save me money on Islip, New York to Puerto Rico flights?

You could potentially save up to 14% on your flight if you consider stops on a Islip, New York to Puerto Rico flight.

Cheap Islip, New York to Puerto Rico flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Puerto Rico

Fastest flight time

7h 07m

Direct flights

None
The fastest flight from Islip, New York to Puerto Rico takes 7h 07m
There are no direct flights from Islip, New York to Puerto Rico. There are no popular flight routes from Islip, New York to Puerto Rico.
Search flight deals

  • When did momondo last update prices for flights from Islip Long Island Airport to Puerto Rico?

    Prices for flights from Islip Long Island Airport to Puerto Rico are updated daily.

  • How many operators does momondo search for flights from Islip Long Island Airport to Puerto Rico?

  • How old do you have to be to fly from Islip Long Island Airport to Puerto Rico?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to Puerto Rico.

  • What documentation or ID do you need to fly to Puerto Rico?

    The travel and health documents you'll need for your trip to Puerto Rico may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Puerto Rico. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Islip, New York to Puerto Rico

Compare and see reviews for airlines that fly from Islip, New York to Puerto Rico with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $111Free CancellationRating
5.8
3,084 reviews
Search Frontier flights
JetBluePriceFrom $216Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights
SouthwestPriceFrom $367Free CancellationRating
7.9
4,253 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Puerto Rico?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Islip to Puerto Rico for you.

Can I find flights from Islip to Puerto Rico with flexible booking policies on momondo?

Flights from Islip to Puerto Rico with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Islip to Puerto Rico?

Once all potential Islip to Puerto Rico flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Islip to Puerto Rico right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Puerto Rico, momondo offers a useful price alert feature which will track prices for flights to Puerto Rico from Islip and alert you when they change.

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