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Cheap flights from Islip to San Juan from $127

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 to San Juan departing on 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Islip to San Juan

Cheap round-trip flights

Frontier Logo
5:05 pm - 11:59 pmISP-SJU
6h 54m1 stop
Frontier Logo
3:39 am - 10:55 amSJU-ISP
7h 16m1 stop
$219Frontier
Find Deal
sáb., sep. 20 - vie., sep. 26
Frontier Logo
5:05 pm - 11:59 pmISP-SJU
6h 54m1 stop
Frontier Logo
3:39 am - 10:55 amSJU-ISP
7h 16m1 stop
$222Frontier
Find Deal
sáb., sep. 27 - vie., oct. 3
Frontier Logo
5:05 pm - 11:59 pmISP-SJU
6h 54m1 stop
Frontier Logo
3:39 am - 10:40 amSJU-ISP
7h 01m1 stop
$226Frontier
Find Deal
vie., sep. 26 - lun., sep. 29
Frontier Logo
5:05 pm - 11:59 pmISP-SJU
6h 54m1 stop
Frontier Logo
3:39 am - 10:40 amSJU-ISP
7h 01m1 stop
$232Frontier
Find Deal
vie., oct. 3 - dom., oct. 5
Frontier Logo
5:05 pm - 11:59 pmISP-SJU
6h 54m1 stop
Frontier Logo
3:39 am - 10:55 amSJU-ISP
7h 16m1 stop
$244Frontier
Find Deal
lun., sep. 15 - vie., sep. 19
Frontier Logo
4:58 pm - 1:54 amISP-SJU
8h 56m1 stop
Frontier Logo
10:39 pm - 10:37 amSJU-ISP
12h 58m1 stop
$246Frontier
Find Deal
vie., oct. 31 - dom., nov. 2
Logo
5:05 pm - 1:58 amISP-SJU
32h 53m2 stops
Logo
3:39 am - 10:40 amSJU-ISP
7h 01m1 stop
$313
Find Deal
lun., sep. 29 - dom., oct. 5
JetBlue Logo
4:11 pm - 11:41 pmISP-SJU
7h 30m1 stop
JetBlue Logo
4:05 am - 1:02 pmSJU-ISP
8h 57m1 stop
$347JetBlue
Find Deal
sáb., oct. 25 - mar., oct. 28
JetBlue Logo
12:05 pm - 8:02 pmISP-SJU
6h 57m1 stop
JetBlue Logo
6:00 am - 12:20 pmSJU-ISP
7h 20m1 stop
$380JetBlue
Find Deal
jue., ene. 22 - mar., ene. 27
JetBlue Logo
1:57 pm - 9:04 pmISP-SJU
7h 07m1 stop
JetBlue Logo
6:00 am - 1:02 pmSJU-ISP
7h 02m1 stop
$413JetBlue
Find Deal
dom., oct. 26 - mié., oct. 29

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

Our best Frontier deals on Islip to San Juan Luis Munoz Marin Intl Airport flight tickets
Frontier
Sep 20
ISP5:05 pmIslip Long Island
6h 54m
1 stop
SJU11:59 pmSan Juan Luis Munoz Marin Intl
Sep 26
SJU3:39 amSan Juan Luis Munoz Marin Intl
7h 16m
1 stop
ISP10:55 amIslip Long Island
$219
Find similar
Frontier
Sep 27
ISP5:05 pmIslip Long Island
6h 54m
1 stop
SJU11:59 pmSan Juan Luis Munoz Marin Intl
Oct 3
SJU3:39 amSan Juan Luis Munoz Marin Intl
7h 16m
1 stop
ISP10:55 amIslip Long Island
$222
Find similar
Frontier
Sep 26
ISP5:05 pmIslip Long Island
6h 54m
1 stop
SJU11:59 pmSan Juan Luis Munoz Marin Intl
Sep 29
SJU3:39 amSan Juan Luis Munoz Marin Intl
7h 01m
1 stop
ISP10:40 amIslip Long Island
$226
Find similar

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

Our best JetBlue deals on Islip to San Juan Luis Munoz Marin Intl Airport flight tickets
JetBlue
Oct 25
ISP4:11 pmIslip Long Island
7h 30m
1 stop
SJU11:41 pmSan Juan Luis Munoz Marin Intl
Oct 28
SJU4:05 amSan Juan Luis Munoz Marin Intl
8h 57m
1 stop
ISP1:02 pmIslip Long Island
$347
Find similar
JetBlue
Jan 22
ISP12:05 pmIslip Long Island
6h 57m
1 stop
SJU8:02 pmSan Juan Luis Munoz Marin Intl
Jan 27
SJU6:00 amSan Juan Luis Munoz Marin Intl
7h 20m
1 stop
ISP12:20 pmIslip Long Island
$380
Find similar
JetBlue
Oct 26
ISP1:57 pmIslip Long Island
7h 07m
1 stop
SJU9:04 pmSan Juan Luis Munoz Marin Intl
Oct 29
SJU6:00 amSan Juan Luis Munoz Marin Intl
7h 02m
1 stop
ISP1:02 pmIslip Long Island
$413
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Islip 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 septiembre 4, 2025.
Use the filters below to find and compare flights from Islip 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

sáb. 9/20

5:05 pm-11:59 pm

1 stop6h 54m

San Juan Luis Munoz Marin Intl

vie. 9/26

3:39 am-10:55 am

1 stop7h 16m

$219

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

sáb. 9/27

5:05 pm-11:59 pm

1 stop6h 54m

San Juan Luis Munoz Marin Intl

vie. 10/3

3:39 am-10:55 am

1 stop7h 16m

$222

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

vie. 9/26

5:05 pm-11:59 pm

1 stop6h 54m

San Juan Luis Munoz Marin Intl

lun. 9/29

3:39 am-10:40 am

1 stop7h 01m

$226

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

vie. 10/3

5:05 pm-11:59 pm

1 stop6h 54m

San Juan Luis Munoz Marin Intl

dom. 10/5

3:39 am-10:40 am

1 stop7h 01m

$232

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

lun. 9/15

5:05 pm-11:59 pm

1 stop6h 54m

San Juan Luis Munoz Marin Intl

vie. 9/19

3:39 am-10:55 am

1 stop7h 16m

$244

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

vie. 10/31

4:58 pm-1:54 am

1 stop8h 56m

San Juan Luis Munoz Marin Intl

dom. 11/2

10:39 pm-10:37 am

1 stop12h 58m

$246

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

lun. 9/29

5:05 pm-1:58 am

2 stops32h 53m

San Juan Luis Munoz Marin Intl

dom. 10/5

3:39 am-10:40 am

1 stop7h 01m

$313

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

sáb. 10/25

4:11 pm-11:41 pm

1 stop7h 30m

San Juan Luis Munoz Marin Intl

mar. 10/28

4:05 am-1:02 pm

1 stop8h 57m

$347

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

jue. 1/22

12:05 pm-8:02 pm

1 stop6h 57m

San Juan Luis Munoz Marin Intl

mar. 1/27

6:00 am-12:20 pm

1 stop7h 20m

$380

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

dom. 10/26

1:57 pm-9:04 pm

1 stop7h 07m

San Juan Luis Munoz Marin Intl

mié. 10/29

6:00 am-1:02 pm

1 stop7h 02m

$413

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 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 November, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $215.

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 is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $252. 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 because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $309.

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 $220. Flights in the evening are often more expensive with an average ticket price of $313.

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

You could potentially save up to 3% on your flight if you consider stops on a Islip to San Juan Luis Munoz Marin Intl Airport flight.

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

Direct flights

None
There are no direct flights from Islip to San Juan Luis Munoz Marin Intl Airport. There are no popular flight routes from Islip 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 54m 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 to San Juan Luis Munoz Marin Intl Airport?

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

Compare and see reviews for airlines that fly from Islip to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $59Free CancellationRating
5.8
3,195 reviews
Search Frontier flights
JetBluePriceFrom $216Free CancellationRating
7.2
2,916 reviews
Search JetBlue flights
SouthwestPriceFrom $477Free CancellationRating
8.0
4,241 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
Humacao
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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