$162+ Cheap flights from Islip, NY (ISP) to San Juan
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SJU
Oct 17 — Oct 241
Round-trip
1 adult, Economy
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Find cheap flights from Islip to San Juan with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to San Juan
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Cheapest flights from Islip to San JuanExplore the most affordable flight options available from Islip to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
Explore the most affordable flight options available from Islip to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Fri 10/306:54 pm -
2 stops28h 50m
Fri 11/63:55 am -
1 stop14h 36m
Deal found 9/13![Frontier logo]()
$305
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/76:33 pm -
1 stop7h 17m
Fri 11/1311:20 am -
1 stop7h 36m
Deal found 9/15![Frontier logo]()
$350
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:43 pm -
1 stop15h 52m
Tue 10/66:42 pm -
1 stop22h 16m
Deal found 9/16![Frontier logo]()
$355
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/45:43 pm -
1 stop8h 09m
Thu 10/810:39 am -
1 stop6h 51m
Deal found 9/16![Frontier logo]()
$370
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:15 am -
2 stops9h 00m
Tue 10/206:35 am -
2 stops8h 55m
Deal found 9/15![Southwest logo]()
$389
This CheapOair deal was found by Cheapflights users on 9/13. 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.
Tue 9/225:43 pm -
1 stop8h 09m
Sat 9/267:00 am -
1 stop9h 58m
Deal found 9/13![Frontier logo]()
$391
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:20 pm -
1 stop6h 50m
Wed 10/216:35 am -
1 stop6h 35m
Deal found 9/15![Southwest logo]()
$402
This Priceline deal was found by Cheapflights users on 9/13. 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.
Mon 9/286:48 pm -
1 stop21h 57m
Fri 10/23:55 pm -
1 stop25h 03m
Deal found 9/13![Frontier logo]()
$416
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:54 pm -
1 stop6h 56m
Sat 11/1411:20 am -
1 stop7h 11m
Deal found 9/13![Frontier logo]()
$421
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:00 pm -
2 stops11h 58m
Tue 10/66:42 pm -
1 stop22h 16m
Deal found 9/16![Multiple Airlines logo]()
$426
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Tue 9/2212:00 pm -
2 stops13h 52m
Fri 9/252:57 am -
1 stop14h 01m
Deal found 9/13![Multiple Airlines logo]()
$427
Best flights from Islip to San JuanDiscover carefully curated flight deals from Islip to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
Discover carefully curated flight deals from Islip to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
This Frontier deal was found by Cheapflights users on 9/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:43 pm -
1 stop8h 09m
Thu 10/87:20 am -
1 stop10h 10m
Deal found 9/12![Frontier logo]()
$370
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:35 pm -
2 stops8h 25m
Mon 11/97:30 am -
2 stops9h 05m
Deal found 9/16![Southwest logo]()
$402
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.
Wed 12/910:49 am -
1 stop9h 47m
Thu 12/1711:45 am -
1 stop6h 42m
Deal found 9/15![JetBlue logo]()
$544
This CheapOair deal was found by Cheapflights users on 9/13. 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.
Tue 9/225:43 pm -
1 stop8h 09m
Sat 9/267:00 am -
1 stop9h 58m
Deal found 9/13![Frontier logo]()
$391
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/173:50 pm -
1 stop6h 25m
Tue 10/206:35 am -
1 stop6h 35m
Deal found 9/15![Southwest logo]()
$402
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:54 pm -
1 stop6h 56m
Sat 11/1411:20 am -
1 stop7h 11m
Deal found 9/13![Frontier logo]()
$421
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/146:33 pm -
1 stop7h 17m
Fri 11/203:55 am -
1 stop12h 50m
Deal found 9/13![Frontier logo]()
$441
This Southwest deal was found by Cheapflights users on 9/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/115:40 am -
2 stops10h 25m
Sun 10/183:05 pm -
1 stop8h 50m
Deal found 9/13![Southwest logo]()
$516
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:33 pm -
1 stop7h 17m
Sat 11/1411:20 am -
1 stop7h 11m
Deal found 9/13![Frontier logo]()
$446
This Frontier deal was found by Cheapflights users on 9/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/156:25 pm -
1 stop7h 28m
Mon 10/197:20 am -
1 stop10h 40m
Deal found 9/12![Frontier logo]()
$446
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:33 pm -
1 stop7h 17m
Mon 11/1611:20 am -
1 stop7h 36m
Deal found 9/13![Frontier logo]()
$487
Last-minute flights from Islip to San JuanDiscover last-minute flight deals from Islip to San Juan. Data last updated September 17, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to San Juan. Data last updated September 17, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 9/13. 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.
Tue 9/225:43 pm -
1 stop8h 09m
Sat 9/267:00 am -
1 stop9h 58m
Deal found 9/13![Frontier logo]()
$391
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Tue 9/2212:00 pm -
2 stops13h 52m
Fri 9/252:57 am -
1 stop14h 01m
Deal found 9/13![Multiple Airlines logo]()
$427
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:43 pm -
1 stop8h 09m
Sat 10/37:00 am -
1 stop9h 58m
Deal found 9/14![Frontier logo]()
$445
This Priceline deal was found by Cheapflights users on 9/13. 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.
Mon 9/286:48 pm -
1 stop21h 57m
Fri 10/23:55 pm -
1 stop25h 03m
Deal found 9/13![Frontier logo]()
$416
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:43 pm -
1 stop15h 52m
Tue 10/66:42 pm -
1 stop22h 16m
Deal found 9/16![Frontier logo]()
$355
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:00 pm -
2 stops11h 58m
Tue 10/66:42 pm -
1 stop22h 16m
Deal found 9/16![Multiple Airlines logo]()
$426
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/45:43 pm -
1 stop8h 09m
Thu 10/810:39 am -
1 stop6h 51m
Deal found 9/16![Frontier logo]()
$370
This Expedia deal was found by Cheapflights users on 9/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:25 pm -
1 stop7h 28m
Sun 10/187:20 am -
1 stop10h 10m
Deal found 9/13![Frontier logo]()
$436
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:20 pm -
1 stop6h 50m
Wed 10/216:35 am -
1 stop6h 35m
Deal found 9/15![Southwest logo]()
$402
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:15 am -
2 stops9h 00m
Tue 10/206:35 am -
2 stops8h 55m
Deal found 9/15![Southwest logo]()
$389
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Fri 10/306:54 pm -
2 stops28h 50m
Fri 11/63:55 am -
1 stop14h 36m
Deal found 9/13![Frontier logo]()
$305
One-way flights from Islip to San JuanSearch for one-way flight options from Islip to San Juan. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
Search for one-way flight options from Islip to San Juan. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:25 pm -
1 stop7h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$162
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.
Sun 11/16:33 pm -
1 stop22h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$168
This Frontier deal was found by Cheapflights users on 9/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/186:25 pm -
1 stop7h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Frontier logo]()
$188
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:43 pm -
1 stop8h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$208
This CheapOair deal was found by Cheapflights users on 9/13. 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 12/109:56 am -
1 stop15h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Frontier logo]()
$220
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2811:52 am -
2 stops25h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Multiple Airlines logo]()
$230
This CheapOair deal was found by Cheapflights users on 9/13. 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.
Tue 9/225:43 pm -
1 stop8h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Frontier logo]()
$236
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/235:43 pm -
1 stop8h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$238
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1012:00 pm -
2 stops25h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$239
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.
Fri 9/255:43 pm -
1 stop15h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Frontier logo]()
$260
Find flight deals from Islip to San Juan
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Juan (PR1). 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 17, 2026.
Round-trip from | $305 (Kiwi.com) |
|---|---|
One-way from | $162 (Frontier) |
Popular in | February |
Cheapest in | January |
Average price | $299 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to San Juan 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 7,457,451 searches. Data last updated September 17, 2026.
Use the filters below to find and compare flights from Islip to San Juan that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
IslipSan Juan
ISP Islip Long Island - SJU San Juan Luis Munoz Marin Intl
ISPSJU
Islip Long Island
Thu 11/19
9:40 am-5:01 pm
1 stop6h 21m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$346
IslipSan Juan
ISP Islip Long Island - SJU San Juan Luis Munoz Marin Intl
ISPSJU
Islip Long Island
Tue 11/3
2:28 pm-12:10 am
1 stop8h 42m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$346
IslipSan Juan
ISP Islip Long Island - SJU San Juan Luis Munoz Marin Intl
ISPSJU
Islip Long Island
Wed 11/4
2:28 pm-12:10 am
1 stop8h 42m
San Juan Luis Munoz Marin Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$346
IslipSan Juan
ISP Islip Long Island - SJU San Juan Luis Munoz Marin Intl
ISPSJU
Islip Long Island
Sat 10/3
5:43 pm-1:52 am
1 stop8h 09m
San Juan Luis Munoz Marin Intl
Thu 10/8
7:20 am-5:30 pm
1 stop10h 10m
$370
IslipSan Juan
ISP Islip Long Island - SJU San Juan Luis Munoz Marin Intl
ISPSJU
Islip Long Island
Tue 9/22
5:43 pm-1:52 am
1 stop8h 09m
San Juan Luis Munoz Marin Intl
Sat 9/26
7:00 am-4:58 pm
1 stop9h 58m
$391
IslipSan Juan
ISP Islip Long Island - SJU San Juan Luis Munoz Marin Intl
ISPSJU
Islip Long Island
Thu 11/5
1:35 pm-11:00 pm
2 stops8h 25m
San Juan Luis Munoz Marin Intl
Mon 11/9
7:30 am-3:35 pm
2 stops9h 05m
$402
IslipSan Juan
ISP Islip Long Island - SJU San Juan Luis Munoz Marin Intl
ISPSJU
Islip Long Island
Sat 10/17
3:50 pm-10:15 pm
1 stop6h 25m
San Juan Luis Munoz Marin Intl
Tue 10/20
6:35 am-1:10 pm
1 stop6h 35m
$402
IslipSan Juan
ISP Islip Long Island - SJU San Juan Luis Munoz Marin Intl
ISPSJU
Islip Long Island
Fri 11/13
6:54 pm-2:50 am
1 stop6h 56m
San Juan Luis Munoz Marin Intl
Sat 11/14
11:20 am-5:31 pm
1 stop7h 11m
$421
IslipSan Juan
ISP Islip Long Island - SJU San Juan Luis Munoz Marin Intl
ISPSJU
Islip Long Island
Sat 11/14
6:33 pm-2:50 am
1 stop7h 17m
San Juan Luis Munoz Marin Intl
Fri 11/20
3:55 am-3:45 pm
1 stop12h 50m
$441
IslipSan Juan
ISP Islip Long Island - SJU San Juan Luis Munoz Marin Intl
ISPSJU
Islip Long Island
Thu 11/12
6:33 pm-2:50 am
1 stop7h 17m
San Juan Luis Munoz Marin Intl
Sat 11/14
11:20 am-5:31 pm
1 stop7h 11m
$446
Showing 1-10 of 21 resultsSorted by cheapest first
Best time to book a flight from Islip to San Juan
Have a flexible travel schedule? Discover the best time to fly to San Juan from Islip with our price prediction graph.
ISP-PR1
ISP-SJU
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 San Juan
ISP-PR1
ISP-SJU
No data available for this route at this time. Please check back soon.
Reviews of airlines servicing San Juan
Get insights into the airlines that provide service to San Juan. 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 San Juan. Reviews last updated September 17, 2026.
Peruse reviews from past customers who have flown with Southwest from Islip to San Juan to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Food
7.0
Boarding
8.1
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
4.0
OkaySteven,Sep 2026
OGG - HNL
Related info for your journey
Find useful and relevant information for your journey from Islip to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Islip to San Juan
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Islip and San Juan flights
Browse other Islip and San Juan flight options. Last updated on September 17, 2026.
Other flights from Islip
Browse through other flights departing from Islip. Flights are based on user searches made on Cheapflights and were last updated on September 17, 2026.
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Top airline flying from Islip to San Juan
Discover the top airline that operate flights from Islip to San Juan. 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 7,457,451 searches. Data last updated September 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$367 | Average$796 | FlexibilityNo cancel fee | On-time63% |