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Cheap flights from Islip, New York to Puerto Rico from $96

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 4/10. 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

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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
7:59 pm - 11:29 pm
ISP
-
SJU
27h 30m
1 stop
Frontier Logo
3:19 pm - 9:13 am
SJU
-
ISP
17h 54m
1 stop
$192Frontier
Sun, Apr 12 - Thu, Apr 16
Frontier Logo
4:07 pm - 2:01 am
ISP
-
SJU
9h 54m
1 stop
Frontier Logo
3:03 am - 10:05 am
SJU
-
ISP
7h 02m
1 stop
$212Frontier
Mon, May 4 - Sun, May 10
Frontier Logo
8:31 pm - 11:29 pm
ISP
-
SJU
26h 58m
1 stop
Frontier Logo
6:30 am - 9:13 am
SJU
-
ISP
26h 43m
1 stop
$213Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
4:07 pm - 2:01 am
ISP
-
SJU
9h 54m
1 stop
Frontier Logo
7:00 am - 9:13 am
SJU
-
ISP
26h 13m
1 stop
$233Frontier
Fri, Apr 24 - Sat, May 2
Frontier Logo
10:03 am - 11:22 pm
ISP
-
SJU
13h 19m
1 stop
Frontier Logo
11:45 am - 9:08 am
SJU
-
ISP
21h 23m
1 stop
$234Frontier
Fri, May 29 - Fri, Jun 5
Frontier Logo
4:07 pm - 9:54 am
ISP
-
SJU
17h 47m
1 stop
Frontier Logo
3:19 pm - 9:33 am
SJU
-
ISP
18h 14m
1 stop
$253Frontier
Mon, Apr 27 - Wed, Apr 29
Frontier Logo
4:07 pm - 3:37 pm
ISP
-
SJU
23h 30m
1 stop
Frontier Logo
6:30 am - 9:33 am
SJU
-
ISP
27h 03m
1 stop
$254Frontier
Fri, Apr 17 - Wed, Apr 22
Frontier Logo
1:22 pm - 1:58 am
ISP
-
SJU
12h 36m
1 stop
Frontier Logo
9:10 pm - 10:30 am
SJU
-
ISP
13h 20m
1 stop
$258Frontier
Mon, Mar 30 - Fri, Apr 3
Frontier Logo
11:00 am - 2:08 am
ISP
-
SJU
15h 08m
1 stop
Frontier Logo
3:03 am - 10:05 am
SJU
-
ISP
7h 02m
1 stop
$268Frontier
Fri, May 8 - Sun, May 10
Multiple Airlines Logo
9:45 am - 6:43 pm
ISP
-
MAZ
8h 58m
2 stops
Multiple Airlines Logo
7:35 am - 6:44 pm
MAZ
-
ISP
11h 09m
2 stops
$1,719Multiple Airlines
Fri, Mar 27 - Tue, Mar 31

Frontier flights from Islip, New York to Puerto Rico

Our best Frontier deals on Islip, New York to Puerto Rico flight tickets
Frontier
Apr 12
ISP7:59 pmIslip Long Island
27h 30m
1 stop
SJU11:29 pmSan Juan Luis Munoz Marin Intl
Apr 16
SJU3:19 pmSan Juan Luis Munoz Marin Intl
17h 54m
1 stop
ISP9:13 amIslip Long Island
$192
Frontier
Apr 9
ISP8:36 pmIslip Long Island
27h 04m
1 stop
SJU11:40 pmSan Juan Luis Munoz Marin Intl
Apr 16
SJU3:19 pmSan Juan Luis Munoz Marin Intl
17h 54m
1 stop
ISP9:13 amIslip Long Island
$212
Frontier
Apr 16
ISP8:31 pmIslip Long Island
26h 58m
1 stop
SJU11:29 pmSan Juan Luis Munoz Marin Intl
Apr 19
SJU6:30 amSan Juan Luis Munoz Marin Intl
26h 43m
1 stop
ISP9:13 amIslip Long Island
$213

Southwest flights from Islip, New York to Puerto Rico

Our best Southwest deals on Islip, New York to Puerto Rico flight tickets
Southwest
Apr 12
ISP6:05 amIslip Long Island
11h 00m
2 stops
SJU5:05 pmSan Juan Luis Munoz Marin Intl
Apr 17
SJU2:00 pmSan Juan Luis Munoz Marin Intl
9h 30m
2 stops
ISP11:30 pmIslip Long Island
$412
Southwest
Mar 22
ISP5:40 amIslip Long Island
10h 35m
2 stops
SJU4:15 pmSan Juan Luis Munoz Marin Intl
Mar 26
SJU5:30 amSan Juan Luis Munoz Marin Intl
11h 50m
2 stops
ISP5:20 pmIslip Long Island
$636
Southwest
Mar 16
ISP2:00 pmIslip Long Island
9h 35m
2 stops
SJU11:35 pmSan Juan Luis Munoz Marin Intl
Mar 20
SJU1:05 pmSan Juan Luis Munoz Marin Intl
10h 50m
2 stops
ISP11:55 pmIslip Long Island
$696

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 March 12, 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

Sun 4/12

7:59 pm-11:29 pm

1 stop27h 30m

San Juan Luis Munoz Marin Intl

Thu 4/16

3:19 pm-9:13 am

1 stop17h 54m

$192
Quickest round-trip

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 5/4

4:07 pm-2:01 am

1 stop9h 54m

San Juan Luis Munoz Marin Intl

Sun 5/10

3:03 am-10:05 am

1 stop7h 02m

$212

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 4/16

8:31 pm-11:29 pm

1 stop26h 58m

San Juan Luis Munoz Marin Intl

Sun 4/19

6:30 am-9:13 am

1 stop26h 43m

$213

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 4/24

4:07 pm-2:01 am

1 stop9h 54m

San Juan Luis Munoz Marin Intl

Sat 5/2

7:00 am-9:13 am

1 stop26h 13m

$233

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 5/29

10:03 am-11:22 pm

1 stop13h 19m

San Juan Luis Munoz Marin Intl

Fri 6/5

11:45 am-9:08 am

1 stop21h 23m

$234

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 4/27

4:07 pm-9:54 am

1 stop17h 47m

San Juan Luis Munoz Marin Intl

Wed 4/29

3:19 pm-9:33 am

1 stop18h 14m

$253

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 4/17

4:07 pm-3:37 pm

1 stop23h 30m

San Juan Luis Munoz Marin Intl

Wed 4/22

6:30 am-9:33 am

1 stop27h 03m

$254

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 3/30

1:22 pm-1:58 am

1 stop12h 36m

San Juan Luis Munoz Marin Intl

Fri 4/3

9:10 pm-10:30 am

1 stop13h 20m

$258

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 5/8

11:00 am-2:08 am

1 stop15h 08m

San Juan Luis Munoz Marin Intl

Sun 5/10

3:03 am-10:05 am

1 stop7h 02m

$268

IslipMayagüez

ISP - MAZ

ISPMAZ

Islip Long Island

Fri 3/27

9:45 am-6:43 pm

2 stops8h 58m

Mayagüez Eugenio M De Hostos

Tue 3/31

7:35 am-6:44 pm

2 stops11h 09m

$1,719

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

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 00m

Direct flights

None
The fastest flight from Islip, New York to Puerto Rico takes 7h 00m
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 $106Free CancellationRating
5.7
3,033 reviews
Search Frontier flights
SouthwestPriceFrom $367Free CancellationRating
8.0
4,317 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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Sat 4/11
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Find better results for your trip to Puerto Rico

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Popular flights according to clicks in the last 7 days on momondo
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