Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Islip to Caribbean Islands from $126

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 Caribbean Islands departing on 9/26. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Islip to Caribbean Islands

Cheap round-trip flights

Frontier Logo
5:05 pm - 11:59 pmISP-SJU
6h 54m1 stop
Frontier Logo
3:39 am - 10:40 amSJU-ISP
7h 01m1 stop
$250Frontier
Find Deal
Sat, Oct 4 - Sun, Oct 5
Frontier Logo
4:58 pm - 3:32 pmISP-SJU
22h 34m1 stop
Frontier Logo
3:04 am - 10:37 amSJU-ISP
7h 33m1 stop
$254Frontier
Find Deal
Wed, Oct 15 - Thu, Oct 30
Frontier Logo
11:40 am - 8:02 amISP-SJU
20h 22m1 stop
Frontier Logo
4:42 pm - 8:42 pmSJU-ISP
28h 00m1 stop
$269Frontier
Find Deal
Thu, Oct 2 - Mon, Oct 6
Frontier Logo
5:05 pm - 11:59 pmISP-SJU
6h 54m1 stop
Frontier Logo
3:39 am - 10:40 amSJU-ISP
7h 01m1 stop
$280Frontier
Find Deal
Fri, Oct 3 - Sun, Oct 5
JetBlue Logo
1:57 pm - 10:04 pmISP-SJU
7h 07m1 stop
JetBlue Logo
7:30 am - 6:46 pmSJU-ISP
12h 16m1 stop
$320JetBlue
Find Deal
Wed, Nov 19 - Sun, Nov 23
JetBlue Logo
1:57 pm - 4:36 pmISP-NAS
26h 39m1 stop
JetBlue Logo
10:02 am - 6:51 pmNAS-ISP
8h 49m1 stop
$342JetBlue
Find Deal
Wed, Nov 19 - Mon, Nov 24
Multiple Airlines Logo
9:09 pm - 5:34 pmISP-SJU
19h 25m1 stop
Multiple Airlines Logo
11:02 am - 11:00 amSJU-ISP
24h 58m2 stops
$360Multiple Airlines
Find Deal
Fri, Dec 5 - Sat, Dec 13
Multiple Airlines Logo
9:09 pm - 5:34 pmISP-SJU
19h 25m1 stop
Multiple Airlines Logo
1:59 am - 8:14 pmSJU-ISP
19h 15m2 stops
$395Multiple Airlines
Find Deal
Fri, Dec 5 - Fri, Dec 12
Southwest Logo
6:00 am - 7:05 pmISP-SJU
12h 05m2 stops
Southwest Logo
5:40 am - 2:35 pmSJU-ISP
9h 55m1 stop
$411Southwest
Find Deal
Wed, Jan 21 - Mon, Jan 26
Southwest Logo
3:55 pm - 11:20 pmISP-SJU
6h 25m1 stop
Southwest Logo
5:45 am - 3:05 pmSJU-ISP
10h 20m2 stops
$446Southwest
Find Deal
Thu, Dec 11 - Tue, Dec 16

Frontier flights from Islip to Caribbean Islands

Our best Frontier deals on Islip to Caribbean Islands flight tickets
Frontier
Sep 26
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
$245
Find similar
Frontier
Sep 25
ISP11:40 amIslip Long Island
12h 19m
1 stop
SJU11:59 pmSan Juan Luis Munoz Marin Intl
Sep 26
SJU8:00 amSan Juan Luis Munoz Marin Intl
8h 27m
1 stop
ISP4:27 pmIslip Long Island
$249
Find similar
Frontier
Oct 4
ISP5:05 pmIslip Long Island
6h 54m
1 stop
SJU11:59 pmSan Juan Luis Munoz Marin Intl
Oct 5
SJU3:39 amSan Juan Luis Munoz Marin Intl
7h 01m
1 stop
ISP10:40 amIslip Long Island
$250
Find similar

JetBlue flights from Islip to Caribbean Islands

Our best JetBlue deals on Islip to Caribbean Islands flight tickets
JetBlue
Nov 19
ISP1:57 pmIslip Long Island
7h 07m
1 stop
SJU10:04 pmSan Juan Luis Munoz Marin Intl
Nov 23
SJU7:30 amSan Juan Luis Munoz Marin Intl
12h 16m
1 stop
ISP6:46 pmIslip Long Island
$320
Find similar
JetBlue
Nov 19
ISP1:57 pmIslip Long Island
26h 39m
1 stop
NAS4:36 pmNassau Intl
Nov 24
NAS10:02 amNassau Intl
8h 49m
1 stop
ISP6:51 pmIslip Long Island
$342
Find similar
JetBlue
Dec 24
ISP7:40 pmIslip Long Island
13h 11m
1 stop
PUJ9:51 amPunta Cana
Dec 31
PUJ12:00 pmPunta Cana
7h 44m
1 stop
ISP6:44 pmIslip Long Island
$349
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Islip to Caribbean Islands 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 September 18, 2025.
Use the filters below to find and compare flights from Islip to Caribbean Islands that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Sat 10/4

5:05 pm-11:59 pm

1 stop6h 54m

San Juan Luis Munoz Marin Intl

Sun 10/5

3:39 am-10:40 am

1 stop7h 01m

$250

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 10/15

4:58 pm-3:32 pm

1 stop22h 34m

San Juan Luis Munoz Marin Intl

Thu 10/30

3:04 am-10:37 am

1 stop7h 33m

$254

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 10/2

11:40 am-8:02 am

1 stop20h 22m

San Juan Luis Munoz Marin Intl

Mon 10/6

4:42 pm-8:42 pm

1 stop28h 00m

$269

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 10/3

5:05 pm-11:59 pm

1 stop6h 54m

San Juan Luis Munoz Marin Intl

Sun 10/5

3:39 am-10:40 am

1 stop7h 01m

$280

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 11/19

1:57 pm-10:04 pm

1 stop7h 07m

San Juan Luis Munoz Marin Intl

Sun 11/23

7:30 am-6:46 pm

1 stop12h 16m

$320

IslipNassau

ISP - NAS

ISPNAS

Islip Long Island

Wed 11/19

1:57 pm-4:36 pm

1 stop26h 39m

Nassau Intl

Mon 11/24

10:02 am-6:51 pm

1 stop8h 49m

$342

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 12/5

9:09 pm-5:34 pm

1 stop19h 25m

San Juan Luis Munoz Marin Intl

Sat 12/13

11:02 am-11:00 am

2 stops24h 58m

$360

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 12/5

9:09 pm-5:34 pm

1 stop19h 25m

San Juan Luis Munoz Marin Intl

Fri 12/12

1:59 am-8:14 pm

2 stops19h 15m

$395

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 1/21

6:00 am-7:05 pm

2 stops12h 05m

San Juan Luis Munoz Marin Intl

Mon 1/26

5:40 am-2:35 pm

1 stop9h 55m

$411

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 12/11

3:55 pm-11:20 pm

1 stop6h 25m

San Juan Luis Munoz Marin Intl

Tue 12/16

5:45 am-3:05 pm

2 stops10h 20m

$446

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Caribbean Islands from

How to get the cheapest flight ticket from Islip to Caribbean Islands

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 Caribbean Islands?

The month of November is, on average, the cheapest month to fly to Caribbean Islands from Islip, with most prices found around $204. The month of February is another great option to travel to Caribbean Islands, with average flight prices from Islip averaging around $215.

What is the cheapest day to depart on your flight to Caribbean Islands?

The cheapest day to depart from Islip to Caribbean Islands is on a Friday. Travelers who choose to depart for Caribbean Islands on a Friday will often find tickets for as low as $260. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $734. These prices are subject to change though, so be sure to set up a Price Alert for flights to Caribbean Islands.

What is the cheapest time of day to depart on your flight to Caribbean Islands?

According to our data, the cheapest time of day to fly to Caribbean Islands is in the evening. momondo users have found flights departing from Islip to Caribbean Islands in the evening for as low as $208. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the afternoon because they tend to be around $390. Of course, these prices can vary depending on the time of year and what airport you fly to.

Can stopping save me money on Islip to Caribbean Islands flights?

No. A direct flight is the cheapest option for a flight between Islip to Caribbean Islands.

Cheap Islip to Caribbean Islands flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip to Caribbean Islands

Direct flights

None
There are no direct flights from Islip to Caribbean Islands. There are no popular flight routes from Islip to Caribbean Islands.
Search flight deals

  • When did momondo last update prices for flights from Islip Long Island Airport to Caribbean Islands?

    Prices for flights from Islip Long Island Airport to Caribbean Islands refresh daily.

  • How many operators does momondo search for flights from Islip Long Island Airport to Caribbean Islands?

  • How old do you have to be to fly from Islip Long Island Airport to Caribbean Islands?

    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 Caribbean Islands.

  • What documentation or ID do you need to fly to Caribbean Islands?

    The travel and health documents required for your trip to Caribbean Islands can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Caribbean Islands. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Islip to Caribbean Islands?

Best airlines flying from Islip to Caribbean Islands

Compare and see reviews for airlines that fly from Islip to Caribbean Islands with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $59Free CancellationRating
5.8
3,171 reviews
Search Frontier flights
JetBluePriceFrom $216Free CancellationRating
7.2
2,911 reviews
Search JetBlue flights
DeltaPriceFrom $350Free CancellationRating
7.9
7,964 reviews
Search Delta flights
SouthwestPriceFrom $463Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Caribbean Islands?

It is quick and easy to find Islip to Caribbean Islands flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Caribbean Islands that suits you.

Can I find flights from Islip to Caribbean Islands with flexible booking policies on momondo?

momondo does allow users to show only those flights to Caribbean Islands from Islip which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Islip to Caribbean Islands?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Islip to Caribbean Islands.

I’m not ready to book a flight from Islip to Caribbean Islands right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Caribbean Islands, momondo offers a useful price alert feature which will track prices for flights to Caribbean Islands from Islip and alert you when they change.

An easier way to manage your Caribbean Islands trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 10/18
Sat 10/25
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Caribbean Islands

Popular cities in Caribbean Islands

Popular flights according to clicks in the last 7 days on momondo
Flights to New Yorkfrom $49
Flights to Londonfrom $333
Flights to Bangkokfrom $508
Flights to Tokyofrom $374
Flights to Los Angelesfrom $49
Flights to Parisfrom $357
Flights to Copenhagenfrom $370
Flights to Istanbulfrom $382
Flights to Manilafrom $523
Flights to Romefrom $334
Flights to Miamifrom $49
Flights to Chicagofrom $47