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Cheap flights from Islip, New York to Puerto Rico from $160

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 8/28. 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
1 adult, Economy, 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
10:57 am - 7:52 pm
ISP
-
SJU
8h 55m
1 stop
Frontier Logo
3:00 am - 9:33 am
SJU
-
ISP
6h 33m
1 stop
$336Frontier
Tue, Sep 1 - Mon, Sep 14
Frontier Logo
10:57 am - 7:52 pm
ISP
-
SJU
8h 55m
1 stop
Frontier Logo
3:00 am - 9:33 am
SJU
-
ISP
6h 33m
1 stop
$350Frontier
Mon, Aug 31 - Tue, Sep 15
Frontier Logo
3:43 pm - 2:50 am
ISP
-
SJU
10h 07m
1 stop
Frontier Logo
7:05 am - 2:33 pm
SJU
-
ISP
8h 28m
1 stop
$355Frontier
Mon, Nov 2 - Tue, Nov 10
Frontier Logo
10:57 am - 7:52 pm
ISP
-
SJU
8h 55m
1 stop
Frontier Logo
3:00 am - 9:33 am
SJU
-
ISP
6h 33m
1 stop
$356Frontier
Sat, Sep 5 - Mon, Sep 14
Frontier Logo
10:57 am - 7:52 pm
ISP
-
SJU
8h 55m
1 stop
Frontier Logo
3:00 am - 9:33 am
SJU
-
ISP
6h 33m
1 stop
$364Frontier
Mon, Aug 31 - Fri, Sep 11
Multiple Airlines Logo
4:58 pm - 9:19 am
ISP
-
SJU
16h 21m
1 stop
Multiple Airlines Logo
8:57 pm - 9:53 am
SJU
-
ISP
12h 56m
1 stop
$369Multiple Airlines
Tue, Aug 11 - Tue, Aug 18
Frontier Logo
10:57 am - 7:52 pm
ISP
-
SJU
8h 55m
1 stop
Frontier Logo
3:00 am - 9:33 am
SJU
-
ISP
6h 33m
1 stop
$370Frontier
Sun, Aug 30 - Sun, Sep 13
Frontier Logo
10:57 am - 9:43 pm
ISP
-
SJU
10h 46m
1 stop
Frontier Logo
8:37 pm - 9:53 am
SJU
-
ISP
13h 16m
1 stop
$376Frontier
Fri, Jul 24 - Tue, Jul 28
Multiple Airlines Logo
6:00 am - 11:58 pm
ISP
-
SJU
17h 58m
2 stops
Multiple Airlines Logo
8:57 pm - 9:53 am
SJU
-
ISP
12h 56m
1 stop
$384Multiple Airlines
Tue, Aug 11 - Tue, Aug 18
Frontier Logo
3:43 pm - 1:50 am
ISP
-
SJU
10h 07m
1 stop
Frontier Logo
7:05 am - 2:33 pm
SJU
-
ISP
8h 28m
1 stop
$390Frontier
Sat, Oct 31 - Sat, Nov 7

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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
Sep 1
ISP10:57 amIslip Long Island
8h 55m
1 stop
SJU7:52 pmSan Juan Luis Munoz Marin Intl
Sep 14
SJU3:00 amSan Juan Luis Munoz Marin Intl
6h 33m
1 stop
ISP9:33 amIslip Long Island
$336
Frontier
Aug 20
ISP7:09 pmIslip Long Island
13h 02m
1 stop
SJU8:11 amSan Juan Luis Munoz Marin Intl
Aug 25
SJU12:11 pmSan Juan Luis Munoz Marin Intl
21h 42m
1 stop
ISP9:53 amIslip Long Island
$350
Frontier
Nov 2
ISP3:43 pmIslip Long Island
10h 07m
1 stop
SJU2:50 amSan Juan Luis Munoz Marin Intl
Nov 10
SJU7:05 amSan Juan Luis Munoz Marin Intl
8h 28m
1 stop
ISP2:33 pmIslip Long Island
$355

Southwest flights from Islip, New York to Puerto Rico

Our best Southwest deals on Islip, New York to Puerto Rico flight tickets
Southwest
Aug 20
ISP1:15 pmIslip Long Island
8h 55m
2 stops
SJU10:10 pmSan Juan Luis Munoz Marin Intl
Aug 25
SJU6:00 amSan Juan Luis Munoz Marin Intl
10h 55m
1 stop
ISP4:55 pmIslip Long Island
$364
Southwest
Oct 21
ISP6:10 amIslip Long Island
11h 35m
2 stops
SJU5:45 pmSan Juan Luis Munoz Marin Intl
Oct 28
SJU9:55 amSan Juan Luis Munoz Marin Intl
9h 40m
2 stops
ISP7:35 pmIslip Long Island
$412
Southwest
Aug 11
ISP10:55 amIslip Long Island
10h 10m
2 stops
SJU9:05 pmSan Juan Luis Munoz Marin Intl
Aug 18
SJU5:15 amSan Juan Luis Munoz Marin Intl
11h 40m
2 stops
ISP4:55 pmIslip Long Island
$436

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 June 28, 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
Quickest round-trip

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Tue 9/1

10:57 am-7:52 pm

1 stop8h 55m

San Juan Luis Munoz Marin Intl

Mon 9/14

3:00 am-9:33 am

1 stop6h 33m

$336

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 8/31

10:57 am-7:52 pm

1 stop8h 55m

San Juan Luis Munoz Marin Intl

Tue 9/15

3:00 am-9:33 am

1 stop6h 33m

$350

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 11/2

3:43 pm-2:50 am

1 stop10h 07m

San Juan Luis Munoz Marin Intl

Tue 11/10

7:05 am-2:33 pm

1 stop8h 28m

$355

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 9/5

10:57 am-7:52 pm

1 stop8h 55m

San Juan Luis Munoz Marin Intl

Mon 9/14

3:00 am-9:33 am

1 stop6h 33m

$356

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 8/31

10:57 am-7:52 pm

1 stop8h 55m

San Juan Luis Munoz Marin Intl

Fri 9/11

3:00 am-9:33 am

1 stop6h 33m

$364

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Tue 8/11

4:58 pm-9:19 am

1 stop16h 21m

San Juan Luis Munoz Marin Intl

Tue 8/18

8:57 pm-9:53 am

1 stop12h 56m

$369

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sun 8/30

10:57 am-7:52 pm

1 stop8h 55m

San Juan Luis Munoz Marin Intl

Sun 9/13

3:00 am-9:33 am

1 stop6h 33m

$370

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 7/24

10:57 am-9:43 pm

1 stop10h 46m

San Juan Luis Munoz Marin Intl

Tue 7/28

8:37 pm-9:53 am

1 stop13h 16m

$376

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Tue 8/11

6:00 am-11:58 pm

2 stops17h 58m

San Juan Luis Munoz Marin Intl

Tue 8/18

8:57 pm-9:53 am

1 stop12h 56m

$384

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 10/31

3:43 pm-1:50 am

1 stop10h 07m

San Juan Luis Munoz Marin Intl

Sat 11/7

7:05 am-2:33 pm

1 stop8h 28m

$390

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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 July, then you should wait until January to fly from Islip, New York, when ticket prices are also cheap, with an average price of $106.

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

6h 47m

Direct flights

None
The fastest flight from Islip, New York to Puerto Rico takes 6h 47m
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
2,858 reviews
Search Frontier flights
SouthwestPriceFrom $367Free CancellationRating
7.9
4,246 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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Tue 7/28
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