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Cheap flights from Islip, New York to San Juan from $96

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 4/10. 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
7:59 pm - 11:29 pm
ISP
-
SJU
27h 30m
1 stop
Frontier Logo
3:19 pm - 9:13 am
SJU
-
ISP
17h 54m
1 stop
$192Frontier
Sun, Apr 12 - Thu, Apr 16
Frontier Logo
4:07 pm - 2:01 am
ISP
-
SJU
9h 54m
1 stop
Frontier Logo
3:03 am - 10:05 am
SJU
-
ISP
7h 02m
1 stop
$212Frontier
Mon, May 4 - Sun, May 10
Frontier Logo
8:31 pm - 11:29 pm
ISP
-
SJU
26h 58m
1 stop
Frontier Logo
6:30 am - 9:13 am
SJU
-
ISP
26h 43m
1 stop
$213Frontier
Thu, Apr 16 - Sun, Apr 19
Frontier Logo
4:07 pm - 2:01 am
ISP
-
SJU
9h 54m
1 stop
Frontier Logo
7:00 am - 9:13 am
SJU
-
ISP
26h 13m
1 stop
$233Frontier
Fri, Apr 24 - Sat, May 2
Frontier Logo
10:03 am - 11:22 pm
ISP
-
SJU
13h 19m
1 stop
Frontier Logo
11:45 am - 9:08 am
SJU
-
ISP
21h 23m
1 stop
$234Frontier
Fri, May 29 - Fri, Jun 5
Frontier Logo
4:07 pm - 9:54 am
ISP
-
SJU
17h 47m
1 stop
Frontier Logo
3:19 pm - 9:33 am
SJU
-
ISP
18h 14m
1 stop
$253Frontier
Mon, Apr 27 - Wed, Apr 29
Frontier Logo
4:07 pm - 3:37 pm
ISP
-
SJU
23h 30m
1 stop
Frontier Logo
6:30 am - 9:33 am
SJU
-
ISP
27h 03m
1 stop
$254Frontier
Fri, Apr 17 - Wed, Apr 22
Frontier Logo
1:22 pm - 1:58 am
ISP
-
SJU
12h 36m
1 stop
Frontier Logo
9:10 pm - 10:30 am
SJU
-
ISP
13h 20m
1 stop
$258Frontier
Mon, Mar 30 - Fri, Apr 3
Frontier Logo
11:00 am - 2:08 am
ISP
-
SJU
15h 08m
1 stop
Frontier Logo
3:03 am - 10:05 am
SJU
-
ISP
7h 02m
1 stop
$268Frontier
Fri, May 8 - Sun, May 10
Frontier Logo
7:59 pm - 11:29 pm
ISP
-
SJU
27h 30m
1 stop
Frontier Logo
8:00 am - 9:13 am
SJU
-
ISP
25h 13m
1 stop
$274Frontier
Sun, Apr 12 - Sat, Apr 18

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
Apr 12
ISP7:59 pmIslip Long Island
27h 30m
1 stop
SJU11:29 pmSan Juan Luis Munoz Marin Intl
Apr 16
SJU3:19 pmSan Juan Luis Munoz Marin Intl
17h 54m
1 stop
ISP9:13 amIslip Long Island
$192
Frontier
Apr 9
ISP8:36 pmIslip Long Island
27h 04m
1 stop
SJU11:40 pmSan Juan Luis Munoz Marin Intl
Apr 16
SJU3:19 pmSan Juan Luis Munoz Marin Intl
17h 54m
1 stop
ISP9:13 amIslip Long Island
$212
Frontier
Apr 16
ISP8:31 pmIslip Long Island
26h 58m
1 stop
SJU11:29 pmSan Juan Luis Munoz Marin Intl
Apr 19
SJU6:30 amSan Juan Luis Munoz Marin Intl
26h 43m
1 stop
ISP9:13 amIslip Long Island
$213

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

Our best Southwest deals on Islip, New York to San Juan Luis Munoz Marin Intl Airport flight tickets
Southwest
Apr 12
ISP6:05 amIslip Long Island
11h 00m
2 stops
SJU5:05 pmSan Juan Luis Munoz Marin Intl
Apr 17
SJU2:00 pmSan Juan Luis Munoz Marin Intl
9h 30m
2 stops
ISP11:30 pmIslip Long Island
$412
Southwest
Mar 22
ISP5:40 amIslip Long Island
10h 35m
2 stops
SJU4:15 pmSan Juan Luis Munoz Marin Intl
Mar 26
SJU5:30 amSan Juan Luis Munoz Marin Intl
11h 50m
2 stops
ISP5:20 pmIslip Long Island
$636
Southwest
Mar 16
ISP2:00 pmIslip Long Island
9h 35m
2 stops
SJU11:35 pmSan Juan Luis Munoz Marin Intl
Mar 20
SJU1:05 pmSan Juan Luis Munoz Marin Intl
10h 50m
2 stops
ISP11:55 pmIslip Long Island
$696

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 March 12, 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

Cheapest round-trip

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sun 4/12

7:59 pm-11:29 pm

1 stop27h 30m

San Juan Luis Munoz Marin Intl

Thu 4/16

3:19 pm-9:13 am

1 stop17h 54m

$192
Quickest round-trip

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 5/4

4:07 pm-2:01 am

1 stop9h 54m

San Juan Luis Munoz Marin Intl

Sun 5/10

3:03 am-10:05 am

1 stop7h 02m

$212

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 4/16

8:31 pm-11:29 pm

1 stop26h 58m

San Juan Luis Munoz Marin Intl

Sun 4/19

6:30 am-9:13 am

1 stop26h 43m

$213

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 4/24

4:07 pm-2:01 am

1 stop9h 54m

San Juan Luis Munoz Marin Intl

Sat 5/2

7:00 am-9:13 am

1 stop26h 13m

$233

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 5/29

10:03 am-11:22 pm

1 stop13h 19m

San Juan Luis Munoz Marin Intl

Fri 6/5

11:45 am-9:08 am

1 stop21h 23m

$234

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 4/27

4:07 pm-9:54 am

1 stop17h 47m

San Juan Luis Munoz Marin Intl

Wed 4/29

3:19 pm-9:33 am

1 stop18h 14m

$253

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 4/17

4:07 pm-3:37 pm

1 stop23h 30m

San Juan Luis Munoz Marin Intl

Wed 4/22

6:30 am-9:33 am

1 stop27h 03m

$254

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Mon 3/30

1:22 pm-1:58 am

1 stop12h 36m

San Juan Luis Munoz Marin Intl

Fri 4/3

9:10 pm-10:30 am

1 stop13h 20m

$258

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 5/8

11:00 am-2:08 am

1 stop15h 08m

San Juan Luis Munoz Marin Intl

Sun 5/10

3:03 am-10:05 am

1 stop7h 02m

$268

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sun 4/12

7:59 pm-11:29 pm

1 stop27h 30m

San Juan Luis Munoz Marin Intl

Sat 4/18

8:00 am-9:13 am

1 stop25h 13m

$274

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Juan from

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 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 $276. 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 $325.

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 $269. Flights in the afternoon are often more expensive with an average ticket price of $314.

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

You could potentially save up to 31% 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

7h 00m

Direct flights

None
The fastest flight from Islip, New York to San Juan Luis Munoz Marin Intl Airport takes 7h 00m
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 7h 00m 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
3,031 reviews
Search Frontier flights
SouthwestPriceFrom $367Free CancellationRating
8.0
4,319 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
Caguas
Rio Grande
Humacao
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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