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Islip

$126+ Cheap flights from San Juan to Islip (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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ISP
Oct 18 — Oct 251
Sat 10/18
Sat 10/25
1 adult, Economy
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Cheap 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 September 18, 2025.

Round-trip from

$250
(Cheapflightsfares)

One-way from

$126
(Cheapflightsfares)

Popular in

August

Cheapest in

February

Average price

$216
From San Juan to Islip Long Island
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One-way flight from San Juan to Islip Long Island
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Highest demand for flights based on searches. 10% potential increase in price ($25 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 18, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/223:39 amSJU - ISP
1 stop7h 01mFrontier
Fri 10/35:05 pmISP - SJU
1 stop6h 54mFrontier
Deal found 9/15$250
This CheapOair deal was found by Cheapflights users on 9/14. 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 9/258:00 amSJU - ISP
1 stop25h 04mFrontier
Sat 9/275:05 pmISP - SJU
1 stop9h 29mFrontier
Deal found 9/14$254
This CheapOair deal was found by Cheapflights users on 9/16. 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 10/163:40 amSJU - ISP
1 stop6h 57mFrontier
Tue 10/219:37 pmISP - SJU
1 stop14h 38mFrontier
Deal found 9/16$269
This JetBlue deal was found by Cheapflights users on 9/15. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2012:30 pmSJU - ISP
1 stop6h 31mJetBlue
Sun 11/236:26 pmISP - SJU
1 stop6h 28mJetBlue
Deal found 9/15$274
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/223:39 amSJU - ISP
1 stop7h 01mFrontier
Fri 9/265:05 pmISP - SJU
1 stop6h 54mFrontier
Deal found 9/17$280
This CheapOair deal was found by Cheapflights users on 9/15. 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 12/43:55 amSJU - ISP
1 stop17h 19mFrontier
Sun 12/79:09 pmISP - SJU
1 stop28h 41mFrontier
Deal found 9/15$284
This CheapOair deal was found by Cheapflights users on 9/15. 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 9/193:39 amSJU - ISP
1 stop7h 16mFrontier
Fri 10/35:05 pmISP - SJU
1 stop6h 54mFrontier
Deal found 9/15$309
This Cheapflightsfares deal was found by Cheapflights users on 9/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/213:39 amSJU - ISP
1 stop7h 01mFrontier
Fri 9/265:05 pmISP - SJU
1 stop6h 54mFrontier
Deal found 9/16$319
This CheapOair deal was found by Cheapflights users on 9/17. 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 10/109:19 pmSJU - ISP
1 stop13h 18mFrontier
Sun 10/129:44 amISP - SJU
1 stop15h 24mFrontier
Deal found 9/17$324
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/232:49 amSJU - ISP
1 stop7h 48mMultiple Airlines
Sun 10/262:19 pmISP - SJU
2 stops24h 57mMultiple Airlines
Deal found 9/17$333
This CheapOair deal was found by Cheapflights users on 9/15. 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 10/233:40 amSJU - ISP
1 stop6h 57mFrontier
Fri 10/319:54 amISP - SJU
1 stop28h 48mFrontier
Deal found 9/15$349

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 September 18, 2025.
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

Thu 11/13

10:39 pm-10:37 am

1 stop12h 58m

Islip Long Island

Mon 11/17

4:58 pm-11:19 am

1 stop17h 21m

$254

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Sat 11/15

7:30 am-8:02 am

1 stop25h 32m

Islip Long Island

Tue 11/18

6:27 pm-7:00 pm

1 stop23h 33m

$254

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Mon 9/29

3:39 am-10:40 am

1 stop7h 01m

Islip Long Island

Tue 10/7

9:37 pm-2:30 am

1 stop28h 53m

$254

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Thu 10/2

8:00 am-9:04 am

1 stop25h 04m

Islip Long Island

Sun 10/5

9:49 am-3:42 pm

1 stop29h 53m

$254

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Fri 10/24

4:16 pm-11:53 am

1 stop19h 37m

Islip Long Island

Mon 10/27

9:49 am-11:29 pm

1 stop13h 40m

$254

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Fri 10/24

4:16 pm-11:53 am

1 stop19h 37m

Islip Long Island

Sun 10/26

9:47 pm-1:02 pm

1 stop15h 15m

$254

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Mon 10/27

3:04 am-5:42 pm

1 stop14h 38m

Islip Long Island

Sat 11/1

11:40 am-2:42 pm

1 stop27h 02m

$254

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Tue 9/30

3:39 am-10:40 am

1 stop7h 01m

Islip Long Island

Wed 10/8

4:58 pm-9:42 am

1 stop16h 44m

$254

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Thu 11/13

3:59 am-10:37 am

1 stop7h 38m

$126

San JuanIslip

SJU - ISP

SJUISP

San Juan Luis Munoz Marin Intl

Thu 10/2

3:39 am-10:40 am

1 stop7h 01m

$126

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 16 results
1
2

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?

Currently, January is the cheapest month in which you can book a flight from San Juan to Islip (average of $108). Flying from San Juan to Islip in November is currently the most expensive (average of $213). 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?

    There are many flights that can get you from San Juan to Islip in 12h 58m. Fly via Frontier to get the fastest option. The distance from San Juan to Islip is about 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?

    Currently, January is the cheapest month in which you can book a flight from San Juan to Islip (average of $108). Flying from San Juan to Islip in November is currently the most expensive (average of $213). 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

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
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