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Puerto Rico

$91+ Cheap flights from Islip, NY (ISP) to Puerto Rico

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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SJU
ene. 8 — ene. 151
jue. 1/8
jue. 1/15
1 adult, Economy
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Cheap flight deals from Islip to Puerto Rico

Cheapest flights from Islip to Puerto Rico
Explore the most affordable flight options available from Islip to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 9, 2025.

This CheapOair deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/168:29 pmISP - SJU
1 stop29h 21mFrontier
lun. 12/2210:33 amSJU - ISP
1 stop25h 52mFrontier
Deal found 12/8$193
This CheapOair deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/156:00 amISP - SJU
1 stop16h 56mFrontier
dom. 12/213:55 amSJU - ISP
1 stop16h 45mFrontier
Deal found 12/8$202
This CheapOair deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/176:00 amISP - SJU
1 stop19h 50mFrontier
mar. 12/235:09 pmSJU - ISP
1 stop24h 28mFrontier
Deal found 12/8$205
This CheapOair deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/156:00 amISP - SJU
1 stop16h 56mFrontier
mié. 12/2410:33 amSJU - ISP
1 stop7h 04mFrontier
Deal found 12/8$214
This CheapOair deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/1712:37 pmISP - SJU
1 stop19h 21mFrontier
sáb. 12/205:22 pmSJU - ISP
1 stop7h 37mFrontier
Deal found 12/7$230
This CheapOair deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/1712:37 pmISP - SJU
1 stop19h 21mFrontier
lun. 12/226:00 amSJU - ISP
1 stop14h 40mFrontier
Deal found 12/8$232
This CheapOair deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/168:29 pmISP - SJU
1 stop29h 21mFrontier
sáb. 1/318:00 amSJU - ISP
1 stop25h 40mFrontier
Deal found 12/8$234
This CheapOair deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/316:00 amISP - SJU
1 stop12h 28mFrontier
vie. 2/273:55 amSJU - ISP
1 stop7h 45mFrontier
Deal found 12/9$238
This CheapOair deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/156:00 amISP - SJU
1 stop7h 54mFrontier
sáb. 12/2010:28 amSJU - ISP
1 stop14h 31mFrontier
Deal found 12/7$239
This Priceline deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1110:19 amISP - SJU
1 stop15h 31mFrontier
mar. 12/163:55 amSJU - ISP
1 stop21h 43mFrontier
Deal found 12/6$243
This CheapOair deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/1110:19 amISP - SJU
1 stop22h 36mFrontier
lun. 12/154:24 pmSJU - ISP
1 stop8h 35mFrontier
Deal found 12/8$244
This CheapOair deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/168:29 pmISP - SJU
1 stop29h 21mFrontier
lun. 12/223:55 amSJU - ISP
1 stop8h 30mFrontier
Deal found 12/9$246

Find flight deals from Islip to Puerto Rico

Keep the following information in mind while searching for Islip to Puerto Rico flight deals. Data was last updated diciembre 9, 2025.

Round-trip from

$180
(Frontier)

One-way from

$91
(CheapOair)

Popular in

December

Cheapest in

March

Average price

$365
From Islip Long Island to Puerto Rico
Search Deals
One-way flight from Islip Long Island to Puerto Rico
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip 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, Cheapflights users made 2,558,603 searches. Data last updated diciembre 9, 2025.
Use the filters below to find and compare flights from Islip to Puerto Rico that are best for you.

Fly from

Islip

Fly to

Puerto Rico

Route

Depart

Return

Price

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

lun. 3/2

7:41 pm-9:55 am

1 stop13h 14m

San Juan Luis Munoz Marin Intl

mar. 3/3

3:55 am-10:40 am

1 stop7h 45m

$180

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

lun. 2/23

7:41 pm-9:55 am

1 stop13h 14m

San Juan Luis Munoz Marin Intl

dom. 3/1

3:55 am-10:40 am

1 stop7h 45m

$181

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

sáb. 2/21

7:41 pm-9:55 am

1 stop13h 14m

San Juan Luis Munoz Marin Intl

jue. 2/26

9:37 pm-10:40 am

1 stop14h 03m

$181

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

lun. 1/5

6:25 am-12:54 am

1 stop17h 29m

San Juan Luis Munoz Marin Intl

lun. 1/12

9:23 pm-10:46 pm

1 stop26h 23m

$181

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

sáb. 2/21

7:41 pm-9:55 am

1 stop13h 14m

San Juan Luis Munoz Marin Intl

mar. 2/24

3:55 am-10:40 am

1 stop7h 45m

$181

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

mar. 12/16

8:29 pm-2:50 am

1 stop29h 21m

San Juan Luis Munoz Marin Intl

lun. 12/22

10:33 am-11:25 am

1 stop25h 52m

$193

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

sáb. 1/10

7:56 pm-8:54 am

1 stop11h 58m

San Juan Luis Munoz Marin Intl

vie. 1/16

3:58 am-10:46 pm

1 stop19h 48m

$200

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

jue. 1/22

7:43 pm-11:59 pm

1 stop27h 16m

San Juan Luis Munoz Marin Intl

lun. 1/26

8:00 am-6:48 pm

1 stop11h 48m

$202

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

lun. 1/5

6:25 am-12:54 am

1 stop17h 29m

San Juan Luis Munoz Marin Intl

lun. 1/12

3:58 am-10:46 pm

1 stop19h 48m

$202

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

jue. 3/5

10:42 am-2:50 am

1 stop15h 08m

San Juan Luis Munoz Marin Intl

lun. 3/9

5:00 am-7:11 pm

1 stop14h 11m

$202

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

Showing 1-10 of 19 results
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Best time to book a flight from Islip to Puerto Rico

Have a flexible travel schedule? Discover the best time to fly to Puerto Rico 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 Puerto Rico

What is the cheapest month to book a flight from Islip, New York to Puerto Rico?

Currently, February is the cheapest month in which you can book a flight from Islip, New York to Puerto Rico (average of $59). Flying from Islip, New York to Puerto Rico in August is currently the most expensive (average of $138). 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 PR?

Find hourly flight availability from Islip to Puerto Rico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 9, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 56% on flights from Islip, New York to Puerto Rico by exploring options for tickets in the evening.

Reviews of airlines servicing Puerto Rico

Get insights into the airlines that provide service to Puerto Rico. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Puerto Rico. Reviews last updated diciembre 9, 2025.
Get a feel of what it's like to fly with Southwest, JetBlue, and Frontier from Islip to Puerto Rico by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,252 reviews

Boarding

8.1

Overall

7.9

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,252 reviews
Southwest
7.9
Good
4,252 reviews

Boarding

8.1

Overall

7.9

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
JetBlue
7.2
Good
2,899 reviews
Southwest
7.9
Good
4,252 reviews

Boarding

8.1

Overall

7.9

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,085 reviews
Southwest
7.9
Good
4,252 reviews

Boarding

8.1

Overall

7.9

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Islip to Puerto Rico. 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 Puerto Rico?

    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 Puerto Rico.

  • How long is the flight from Islip, New York to Puerto Rico?

    Departing from Islip, New York to Puerto Rico will take you 13h 14m. The distance from Islip, New York to Puerto Rico is about 1599 mi.

  • Can I find deals for flights from Islip to Puerto Rico that include hotel bookings?

    Yes. In addition to deals on Islip to Puerto Rico flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Puerto Rico?

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

  • Can I find deals for business class flights from Islip to Puerto Rico?

    Yes. Cheapflights offers flight deals from Islip to Puerto Rico 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 Puerto Rico?

    Currently, February is the cheapest month in which you can book a flight from Islip, New York to Puerto Rico (average of $59). Flying from Islip, New York to Puerto Rico in August is currently the most expensive (average of $138). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Islip to Puerto Rico

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Islip to Puerto Rico

Discover the top 3 airlines that operate flights from Islip to Puerto Rico. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated diciembre 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$111Average$220FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$216Average$344FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$367Average$535FlexibilityNo cancel feeOn-time63%

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