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Cheap flights from Islip, New York to San Juan from $85

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 San Juan departing on 1/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Islip, New York to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:23 pm - 2:53 am
ISP
-
SJU
29h 30m1 stop
Frontier Logo
5:25 pm - 2:39 pm
SJU
-
ISP
22h 14m1 stop
$170Frontier
Sat, Feb 21 - Wed, Feb 25
Frontier Logo
8:23 am - 2:53 am
ISP
-
SJU
17h 30m1 stop
Frontier Logo
5:25 pm - 7:38 am
SJU
-
ISP
15h 13m1 stop
$171Frontier
Mon, Feb 23 - Thu, Feb 26
Frontier Logo
8:23 pm - 12:54 am
ISP
-
SJU
27h 31m1 stop
Frontier Logo
5:25 pm - 2:39 pm
SJU
-
ISP
22h 14m1 stop
$175Frontier
Sat, Feb 21 - Wed, Feb 25
Frontier Logo
10:43 am - 12:51 pm
ISP
-
SJU
26h 08m1 stop
Frontier Logo
10:56 am - 11:59 pm
SJU
-
ISP
13h 03m1 stop
$177Frontier
Sat, Mar 28 - Sat, Apr 4
Frontier Logo
8:23 pm - 2:53 am
ISP
-
SJU
29h 30m1 stop
Frontier Logo
5:25 pm - 7:48 am
SJU
-
ISP
15h 23m1 stop
$178Frontier
Sat, Feb 21 - Sat, Feb 28
Frontier Logo
8:23 pm - 2:53 am
ISP
-
SJU
29h 30m1 stop
Frontier Logo
3:53 am - 8:40 am
SJU
-
ISP
29h 47m1 stop
$179Frontier
Sat, Feb 21 - Mon, Feb 23
Frontier Logo
7:43 pm - 10:24 am
ISP
-
SJU
13h 41m1 stop
Frontier Logo
6:00 am - 2:39 pm
SJU
-
ISP
9h 39m1 stop
$182Frontier
Thu, Jan 22 - Thu, Feb 12
Frontier Logo
9:33 am - 2:53 am
ISP
-
SJU
16h 20m1 stop
Frontier Logo
3:53 am - 2:39 pm
SJU
-
ISP
11h 46m1 stop
$183Frontier
Wed, Feb 25 - Sun, Mar 1
Frontier Logo
7:43 pm - 11:59 pm
ISP
-
SJU
27h 16m1 stop
Frontier Logo
3:53 am - 2:39 pm
SJU
-
ISP
11h 46m1 stop
$198Frontier
Thu, Jan 29 - Sun, Mar 1
Multiple Airlines Logo
7:43 pm - 3:26 pm
ISP
-
SJU
18h 43m1 stop
Multiple Airlines Logo
6:00 am - 1:13 pm
SJU
-
ISP
8h 13m1 stop
$199Multiple Airlines
Mon, Jan 26 - Wed, Feb 11

Frontier flights from Islip, New York to San Juan Luis Munoz Marin Intl Airport

Our best Frontier deals on Islip, New York to San Juan Luis Munoz Marin Intl Airport flight tickets
Frontier
Feb 21
ISP8:23 pmIslip Long Island
29h 30m
1 stop
SJU2:53 amSan Juan Luis Munoz Marin Intl
Feb 25
SJU5:25 pmSan Juan Luis Munoz Marin Intl
22h 14m
1 stop
ISP2:39 pmIslip Long Island
$170
Frontier
Feb 23
ISP3:59 pmIslip Long Island
16h 55m
1 stop
SJU9:54 amSan Juan Luis Munoz Marin Intl
Mar 1
SJU3:53 amSan Juan Luis Munoz Marin Intl
11h 46m
1 stop
ISP2:39 pmIslip Long Island
$171
Frontier
Feb 21
ISP8:23 pmIslip Long Island
27h 31m
1 stop
SJU12:54 amSan Juan Luis Munoz Marin Intl
Feb 25
SJU5:25 pmSan Juan Luis Munoz Marin Intl
22h 14m
1 stop
ISP2:39 pmIslip Long Island
$175

JetBlue flights from Islip, New York to San Juan Luis Munoz Marin Intl Airport

Our best JetBlue deals on Islip, New York to San Juan Luis Munoz Marin Intl Airport flight tickets
JetBlue
Jan 22
ISP12:25 pmIslip Long Island
6h 37m
1 stop
SJU8:02 pmSan Juan Luis Munoz Marin Intl
Jan 25
SJU6:01 amSan Juan Luis Munoz Marin Intl
6h 32m
1 stop
ISP11:33 amIslip Long Island
$347
JetBlue
Jan 21
ISP12:25 pmIslip Long Island
6h 37m
1 stop
SJU8:02 pmSan Juan Luis Munoz Marin Intl
Jan 28
SJU7:45 pmSan Juan Luis Munoz Marin Intl
14h 07m
1 stop
ISP8:52 amIslip Long Island
$352
JetBlue
Jan 21
ISP12:25 pmIslip Long Island
6h 37m
1 stop
SJU8:02 pmSan Juan Luis Munoz Marin Intl
Jan 25
SJU6:01 amSan Juan Luis Munoz Marin Intl
27h 51m
1 stop
ISP8:52 amIslip Long Island
$420

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York to San Juan Luis Munoz Marin Intl Airport 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 January 8, 2026.
Use the filters below to find and compare flights from Islip, New York to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 2/21

8:23 pm-2:53 am

1 stop29h 30m

San Juan Luis Munoz Marin Intl

Wed 2/25

5:25 pm-2:39 pm

1 stop22h 14m

$170

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 2/23

8:23 am-2:53 am

1 stop17h 30m

San Juan Luis Munoz Marin Intl

Thu 2/26

5:25 pm-7:38 am

1 stop15h 13m

$171

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 2/21

8:23 pm-12:54 am

1 stop27h 31m

San Juan Luis Munoz Marin Intl

Wed 2/25

5:25 pm-2:39 pm

1 stop22h 14m

$175

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 3/28

10:43 am-12:51 pm

1 stop26h 08m

San Juan Luis Munoz Marin Intl

Sat 4/4

10:56 am-11:59 pm

1 stop13h 03m

$177

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 2/21

8:23 pm-2:53 am

1 stop29h 30m

San Juan Luis Munoz Marin Intl

Sat 2/28

5:25 pm-7:48 am

1 stop15h 23m

$178

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 2/21

8:23 pm-2:53 am

1 stop29h 30m

San Juan Luis Munoz Marin Intl

Mon 2/23

3:53 am-8:40 am

1 stop29h 47m

$179

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 1/22

7:43 pm-10:24 am

1 stop13h 41m

San Juan Luis Munoz Marin Intl

Thu 2/12

6:00 am-2:39 pm

1 stop9h 39m

$182

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 2/25

9:33 am-2:53 am

1 stop16h 20m

San Juan Luis Munoz Marin Intl

Sun 3/1

3:53 am-2:39 pm

1 stop11h 46m

$183

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 1/29

7:43 pm-11:59 pm

1 stop27h 16m

San Juan Luis Munoz Marin Intl

Sun 3/1

3:53 am-2:39 pm

1 stop11h 46m

$198

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 1/26

7:43 pm-3:26 pm

1 stop18h 43m

San Juan Luis Munoz Marin Intl

Wed 2/11

6:00 am-1:13 pm

1 stop8h 13m

$199

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Islip, New York to San Juan Luis Munoz Marin Intl Airport

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

What is the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport?

If you aren’t able to travel to San Juan Luis Munoz Marin Intl Airport during the month of February, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $299.

What is the cheapest day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

On average, the least expensive day to fly to San Juan Luis Munoz Marin Intl Airport from Islip, New York is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $256. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Thursday is the most expensive day to depart from Islip, New York because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $313.

What is the cheapest time of day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

The cheapest time of day to fly to San Juan Luis Munoz Marin Intl Airport is at noon when flights can be purchased for as low as $227. Flights in the evening are often more expensive with an average ticket price of $296.

Can stopping save me money on Islip, New York to San Juan Luis Munoz Marin Intl Airport flights?

You could potentially save up to 66% on your flight if you consider stops on a Islip, New York to San Juan Luis Munoz Marin Intl Airport flight.

When to book flights from Islip, New York to San Juan Luis Munoz Marin Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip, New York to San Juan Luis Munoz Marin Intl Airport (ISP to SJU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport

Fastest flight time

6h 39m

Direct flights

None
The fastest flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport takes 6h 39m
There are no direct flights from Islip, New York to San Juan Luis Munoz Marin Intl Airport. There are no popular flight routes from Islip, New York to San Juan Luis Munoz Marin Intl Airport.
Search flight deals

  • How far is Islip Long Island to San Juan Luis Munoz Marin Intl by plane?

    The distance between Islip Long Island and San Juan Luis Munoz Marin Intl is about 1597.3 mi. Typically, this will take 6h 39m by plane in normal conditions.

  • When did momondo last update prices for flights from Islip Long Island Airport to San Juan Luis Munoz Marin Intl Airport?

    Prices for flights from Islip Long Island Airport to San Juan Luis Munoz Marin Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Islip Long Island Airport to San Juan Luis Munoz Marin Intl Airport?

  • How old do you have to be to fly from Islip Long Island Airport to San Juan Luis Munoz Marin Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to San Juan Luis Munoz Marin Intl Airport.

  • What documentation or ID do you need to fly to San Juan Luis Munoz Marin Intl Airport?

    The required travel and health documents for your San Juan Luis Munoz Marin Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Juan Luis Munoz Marin Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Islip, New York to San Juan Luis Munoz Marin Intl Airport?

Best airlines flying from Islip, New York to San Juan Luis Munoz Marin Intl Airport

Compare and see reviews for airlines that fly from Islip, New York to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $106Free CancellationRating
5.7
3,061 reviews
Search Frontier flights
JetBluePriceFrom $216Free CancellationRating
7.2
2,893 reviews
Search JetBlue flights
SouthwestPriceFrom $367Free CancellationRating
8.0
4,250 reviews
Search Southwest flights

Traveling to a place near San Juan?

Book flights to San Juan if you plan to visit one of these locations
Carolina
Fajardo
Dorado
Luquillo
Humacao
Caguas
Rio Grande
Bayamón

Why use momondo?

Why should I use momondo to find a flight deal from Islip to San Juan?

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 San Juan for you.

Can I find flights from Islip to San Juan with flexible booking policies on momondo?

All flight searches from Islip to San Juan on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Islip to San Juan?

Once all potential Islip to San Juan 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 San Juan right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Juan from Islip. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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