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Islip

$96+ Cheap flights from San Juan to Islip, NY (ISP)

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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ISP
Mar 24 — Mar 311
Tue 3/24
Tue 3/31
1 adult, Economy
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Cheap flight deals from San Juan to Islip

Cheapest flights from San Juan to Islip
Explore the most affordable flight options available from San Juan to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 22, 2026.

This CheapOair deal was found by Cheapflights users on 2/18. 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.
Fri 4/177:15 am
SJU
-
ISP
1 stop12h 21m
Frontier
Mon 4/204:07 pm
ISP
-
SJU
1 stop17h 47m
Frontier
Deal found 2/18$192
This CheapOair deal was found by Cheapflights users on 2/22. 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.
Sat 5/29:58 am
SJU
-
ISP
1 stop23h 15m
Frontier
Sun 5/34:07 pm
ISP
-
SJU
1 stop17h 47m
Frontier
Deal found 2/22$204
This CheapOair deal was found by Cheapflights users on 2/18. 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.
Thu 4/306:30 am
SJU
-
ISP
1 stop26h 43m
Frontier
Sun 5/34:07 pm
ISP
-
SJU
1 stop9h 54m
Frontier
Deal found 2/18$213
This CheapOair deal was found by Cheapflights users on 2/18. 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.
Fri 4/177:15 am
SJU
-
ISP
1 stop12h 21m
Frontier
Sun 4/194:07 pm
ISP
-
SJU
1 stop9h 54m
Frontier
Deal found 2/18$219
This CheapOair deal was found by Cheapflights users on 2/19. 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.
Thu 2/263:53 am
SJU
-
ISP
1 stop11h 46m
Frontier
Mon 3/23:34 pm
ISP
-
SJU
1 stop10h 19m
Frontier
Deal found 2/19$248
This CheapOair deal was found by Cheapflights users on 2/18. 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.
Thu 2/2610:57 am
SJU
-
ISP
1 stop21h 41m
Frontier
Sun 3/15:51 pm
ISP
-
SJU
1 stop29h 52m
Frontier
Deal found 2/18$261
This CheapOair deal was found by Cheapflights users on 2/20. 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.
Fri 2/277:09 pm
SJU
-
ISP
1 stop22h 03m
Frontier
Sun 3/15:51 pm
ISP
-
SJU
1 stop8h 02m
Frontier
Deal found 2/20$265
This CheapOair deal was found by Cheapflights users on 2/18. 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.
Wed 2/255:25 pm
SJU
-
ISP
1 stop22h 14m
Frontier
Wed 3/49:33 am
ISP
-
SJU
1 stop14h 10m
Frontier
Deal found 2/18$278

Find flight deals from San Juan to Islip

Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) to Islip (ISP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 22, 2026.

Round-trip from

$192
(CheapOair)

One-way from

$96
(CheapOair)

Popular in

August

Cheapest in

October

Average price

$196
From San Juan to Islip Long Island
Search Deals
One-way flight from San Juan to Islip Long Island
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in February 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from San Juan to Islip 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 February 22, 2026.
Use the filters below to find and compare flights from San Juan to Islip that are best for you.

Fly from

San Juan

Fly to

Islip

Route

Depart

Return

Price

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Fri 4/17

7:15 am-7:36 pm

1 stop12h 21m

Islip Long Island

Mon 4/20

4:07 pm-9:54 am

1 stop17h 47m

$192

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Thu 4/30

6:30 am-9:13 am

1 stop26h 43m

Islip Long Island

Sun 5/3

4:07 pm-2:01 am

1 stop9h 54m

$213

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Thu 2/26

3:53 am-2:39 pm

1 stop11h 46m

Islip Long Island

Mon 3/2

3:34 pm-2:53 am

1 stop10h 19m

$248

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Thu 4/2

4:35 pm-1:26 am

1 stop8h 51m

Islip Long Island

Mon 4/13

5:45 am-12:10 am

1 stop18h 25m

$261

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Thu 4/2

4:35 pm-1:26 am

1 stop8h 51m

Islip Long Island

Thu 4/9

8:36 pm-2:01 am

1 stop29h 25m

$261

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Fri 2/27

5:25 pm-7:28 pm

1 stop27h 03m

Islip Long Island

Sun 3/1

8:33 am-10:09 am

1 stop24h 36m

$261

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Thu 2/26

10:57 am-7:38 am

1 stop21h 41m

Islip Long Island

Sun 3/1

5:51 pm-12:43 am

1 stop29h 52m

$261

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Thu 2/26

10:57 am-2:39 pm

1 stop28h 42m

Islip Long Island

Mon 3/2

3:34 pm-9:54 am

1 stop17h 20m

$261

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Wed 2/25

5:25 pm-2:39 pm

1 stop22h 14m

Islip Long Island

Wed 3/4

9:33 am-12:43 am

1 stop14h 10m

$278

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Mon 4/6

9:10 pm-4:58 pm

1 stop19h 48m

Islip Long Island

Thu 4/9

8:36 pm-2:01 am

1 stop29h 25m

$281

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 21 results
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Best time to book a flight from San Juan to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from San Juan 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 San Juan to Islip

What is the cheapest month to book a flight from San Juan to Islip, New York?

Currently, October is the cheapest month in which you can book a flight from San Juan to Islip, New York (average of $51). Flying from San Juan to Islip, New York in August is currently the most expensive (average of $118). 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.

Related info for your journey

Find useful and relevant information for your journey from San Juan to Islip. 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 into for flights to Islip from San Juan?

    For a flight from San Juan to Islip, you will be flying into Long Island. Islip Long Island (ISP) is just 7.2 mi from the center of the city. Long Island is the only Islip airport and it handles 0 inbound flights from San Juan per day. 0 airlines have flights to Islip Long Island from San Juan on a regular basis.

  • How long is the flight from San Juan to Islip, New York?

    For as low as $192, Frontier can have you in Islip, New York from San Juan in 12h 21m. San Juan and Islip, New York are separated by a distance of 1599 mi.

  • Can I find deals for flights from San Juan to Islip that include hotel bookings?

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

  • How can I find direct flights from San Juan to Islip?

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

  • Can I find deals for business class flights from San Juan to Islip?

    Yes. Cheapflights offers flight deals from San Juan to Islip 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 San Juan to Islip, New York?

    Currently, October is the cheapest month in which you can book a flight from San Juan to Islip, New York (average of $51). Flying from San Juan to Islip, New York in August is currently the most expensive (average of $118). 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

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