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Cheap flights from Islip, New York to Puerto Rico from $88

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 5/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

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
11:00 am - 10:43 pm
ISP
-
SJU
11h 43m
1 stop
Frontier Logo
3:03 am - 10:27 am
SJU
-
ISP
7h 24m
1 stop
$194Frontier
Fri, May 15 - Sat, May 16
Frontier Logo
6:43 pm - 11:57 pm
ISP
-
SJU
29h 14m
1 stop
Frontier Logo
6:25 pm - 11:00 am
SJU
-
ISP
16h 35m
1 stop
$204Frontier
Sat, May 16 - Mon, May 18
Frontier Logo
11:00 am - 10:43 pm
ISP
-
SJU
11h 43m
1 stop
Frontier Logo
3:03 am - 10:05 am
SJU
-
ISP
7h 02m
1 stop
$212Frontier
Sat, May 9 - Fri, May 15
Frontier Logo
4:41 pm - 2:09 am
ISP
-
SJU
9h 28m
1 stop
Frontier Logo
6:05 pm - 10:03 am
SJU
-
ISP
15h 58m
1 stop
$224Frontier
Tue, Jun 9 - Wed, Jun 17
Frontier Logo
11:00 am - 2:08 am
ISP
-
SJU
15h 08m
1 stop
Frontier Logo
6:00 am - 11:00 am
SJU
-
ISP
29h 00m
1 stop
$233Frontier
Wed, May 6 - Mon, May 11
Frontier Logo
7:50 pm - 12:37 am
ISP
-
SJU
28h 47m
1 stop
Frontier Logo
6:05 pm - 10:03 am
SJU
-
ISP
15h 58m
1 stop
$236Frontier
Wed, Jun 10 - Wed, Jun 17
Frontier Logo
11:00 am - 2:46 am
ISP
-
SJU
15h 46m
1 stop
Frontier Logo
6:16 pm - 10:03 am
SJU
-
ISP
15h 47m
1 stop
$244Frontier
Mon, Jun 8 - Fri, Jun 12
Frontier Logo
11:00 am - 2:08 am
ISP
-
SJU
15h 08m
1 stop
Frontier Logo
3:33 pm - 10:05 am
SJU
-
ISP
18h 32m
1 stop
$249Frontier
Mon, May 11 - Sun, May 17
Frontier Logo
11:00 am - 1:15 pm
ISP
-
SJU
26h 15m
1 stop
Frontier Logo
3:03 am - 10:05 am
SJU
-
ISP
7h 02m
1 stop
$251Frontier
Fri, May 8 - Sun, May 10
Frontier Logo
7:50 pm - 12:37 am
ISP
-
SJU
28h 47m
1 stop
Frontier Logo
6:16 pm - 10:03 am
SJU
-
ISP
15h 47m
1 stop
$256Frontier
Wed, Jun 10 - Sun, Jun 14

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Frontier flights from Islip, New York to Puerto Rico

Our best Frontier deals on Islip, New York to Puerto Rico flight tickets
Frontier
May 15
ISP11:00 amIslip Long Island
11h 43m
1 stop
SJU10:43 pmSan Juan Luis Munoz Marin Intl
May 16
SJU3:03 amSan Juan Luis Munoz Marin Intl
7h 24m
1 stop
ISP10:27 amIslip Long Island
$194
Frontier
May 16
ISP6:43 pmIslip Long Island
29h 14m
1 stop
SJU11:57 pmSan Juan Luis Munoz Marin Intl
May 18
SJU6:25 pmSan Juan Luis Munoz Marin Intl
16h 35m
1 stop
ISP11:00 amIslip Long Island
$204
Frontier
May 9
ISP11:00 amIslip Long Island
11h 43m
1 stop
SJU10:43 pmSan Juan Luis Munoz Marin Intl
May 15
SJU3:03 amSan Juan Luis Munoz Marin Intl
7h 02m
1 stop
ISP10:05 amIslip Long Island
$212

Southwest flights from Islip, New York to Puerto Rico

Our best Southwest deals on Islip, New York to Puerto Rico flight tickets
Southwest
May 8
ISP12:30 pmIslip Long Island
10h 55m
2 stops
SJU11:25 pmSan Juan Luis Munoz Marin Intl
May 13
SJU11:25 amSan Juan Luis Munoz Marin Intl
10h 45m
2 stops
ISP10:10 pmIslip Long Island
$606
Southwest
May 8
ISP12:30 pmIslip Long Island
10h 55m
2 stops
SJU11:25 pmSan Juan Luis Munoz Marin Intl
May 12
SJU5:35 amSan Juan Luis Munoz Marin Intl
12h 55m
2 stops
ISP6:30 pmIslip Long Island
$656
Southwest
May 1
ISP8:35 amIslip Long Island
11h 25m
2 stops
SJU8:00 pmSan Juan Luis Munoz Marin Intl
May 7
SJU6:50 amSan Juan Luis Munoz Marin Intl
9h 40m
2 stops
ISP4:30 pmIslip Long Island
$666

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 April 26, 2026.
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

Cheapest round-trip

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 5/15

11:00 am-10:43 pm

1 stop11h 43m

San Juan Luis Munoz Marin Intl

Sat 5/16

3:03 am-10:27 am

1 stop7h 24m

$194

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 5/16

6:43 pm-11:57 pm

1 stop29h 14m

San Juan Luis Munoz Marin Intl

Mon 5/18

6:25 pm-11:00 am

1 stop16h 35m

$204
Quickest round-trip

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 5/9

11:00 am-10:43 pm

1 stop11h 43m

San Juan Luis Munoz Marin Intl

Fri 5/15

3:03 am-10:05 am

1 stop7h 02m

$212

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Tue 6/9

4:41 pm-2:09 am

1 stop9h 28m

San Juan Luis Munoz Marin Intl

Wed 6/17

6:05 pm-10:03 am

1 stop15h 58m

$224

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 5/6

11:00 am-2:08 am

1 stop15h 08m

San Juan Luis Munoz Marin Intl

Mon 5/11

6:00 am-11:00 am

1 stop29h 00m

$233

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 6/10

7:50 pm-12:37 am

1 stop28h 47m

San Juan Luis Munoz Marin Intl

Wed 6/17

6:05 pm-10:03 am

1 stop15h 58m

$236

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 6/8

11:00 am-2:46 am

1 stop15h 46m

San Juan Luis Munoz Marin Intl

Fri 6/12

6:16 pm-10:03 am

1 stop15h 47m

$244

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 5/11

11:00 am-2:08 am

1 stop15h 08m

San Juan Luis Munoz Marin Intl

Sun 5/17

3:33 pm-10:05 am

1 stop18h 32m

$249

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 5/8

11:00 am-1:15 pm

1 stop26h 15m

San Juan Luis Munoz Marin Intl

Sun 5/10

3:03 am-10:05 am

1 stop7h 02m

$251

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 6/10

7:50 pm-12:37 am

1 stop28h 47m

San Juan Luis Munoz Marin Intl

Sun 6/14

6:16 pm-10:03 am

1 stop15h 47m

$256

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 January, then you should wait until November to fly from Islip, New York, when ticket prices are also cheap, with an average price of $323.

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

You could potentially save up to 61% 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 52m

Direct flights

None
The fastest flight from Islip, New York to Puerto Rico takes 7h 52m
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

Frequently asked questions about flying from Islip, New York to Puerto Rico

  • 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 $106Free CancellationRating
5.6
2,976 reviews
Search Frontier flights
SouthwestPriceFrom $367Free CancellationRating
8.0
4,325 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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