What airlines fly to Caribbean?

JetBlue, United Airlines and Delta are the top three most popular airlines that fly to Caribbean from Islip according to our data. JetBlue is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Caribbean. Keep in mind that there are 14 different airlines that fly to Caribbean on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Islip Long Island to Caribbean?

JetBlue, Frontier, and Southwest are the most popular carriers operating from Islip Long Island to Caribbean

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

Prices for flights from Islip Long Island Airport to Caribbean were last updated today.

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

As of September 2025, there are 4 operators available to choose from for flights from Islip Long Island Airport to Caribbean.

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

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.

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

The required travel and health documents for your Caribbean 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 Caribbean. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$103 Cheap Flights from Islip to Caribbean in 2025/26

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Find the cheapest flights from Islip to Caribbean

Round-trip

One-way

Last minute

Cheap round-trip flights

6:37 pm - 1:54 amISP-SJU

7h 17m1 stop

3:59 am - 10:37 amSJU-ISP

7h 38m1 stop

$250Frontier

Find Deal

Thu, Oct 30 - Sun, Nov 2

9:37 pm - 1:02 pmISP-SJU

15h 25m1 stop

9:19 pm - 8:42 pmSJU-ISP

23h 23m1 stop

$254Frontier

Find Deal

Thu, Oct 16 - Mon, Oct 20

4:58 pm - 12:00 pmISP-SJU

19h 02m1 stop

9:19 pm - 8:42 pmSJU-ISP

23h 23m1 stop

$269Frontier

Find Deal

Fri, Oct 17 - Mon, Oct 20

4:58 pm - 2:30 amISP-SJU

9h 32m1 stop

3:40 am - 10:37 amSJU-ISP

6h 57m1 stop

$274Frontier

Find Deal

Fri, Oct 17 - Thu, Oct 23

8:09 pm - 9:52 amISP-SJU

12h 43m1 stop

3:55 am - 8:14 pmSJU-ISP

17h 19m1 stop

$337Multiple Airlines

Find Deal

Tue, Dec 2 - Sun, Dec 7

12:09 pm - 5:35 pmISP-MBJ

5h 26m1 stop

10:44 am - 6:01 pmMBJ-ISP

7h 17m1 stop

$361JetBlue

Find Deal

Sat, Nov 22 - Mon, Dec 1

8:21 pm - 3:16 pmISP-SJU

42h 55m2 stops

2:49 am - 10:37 amSJU-ISP

7h 48m1 stop

$367Multiple Airlines

Find Deal

Wed, Oct 22 - Tue, Oct 28

4:24 pm - 11:41 pmISP-SJU

7h 17m1 stop

6:00 am - 1:02 pmSJU-ISP

7h 02m1 stop

$383JetBlue

Find Deal

Tue, Oct 21 - Tue, Oct 28

6:00 am - 2:00 pmISP-MBJ

9h 00m1 stop

1:00 pm - 10:05 pmMBJ-ISP

8h 05m2 stops

$606Southwest

Find Deal

Tue, Oct 21 - Tue, Oct 28

6:00 am - 1:25 pmISP-MBJ

8h 25m2 stops

1:00 pm - 10:05 pmMBJ-ISP

8h 05m2 stops

$627Southwest

Find Deal

Tue, Oct 21 - Tue, Oct 28

Frontier flights from Islip to Caribbean

Our best Frontier deals on Islip to Caribbean 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

Oct 30

ISP6:37 pmIslip Long Island

7h 17m

1 stop

SJU1:54 amSan Juan Luis Munoz Marin Intl

Nov 2

SJU3:59 amSan Juan Luis Munoz Marin Intl

7h 38m

1 stop

ISP10:37 amIslip Long Island

$250

Find similar

Frontier

Oct 16

ISP9:37 pmIslip Long Island

15h 25m

1 stop

SJU1:02 pmSan Juan Luis Munoz Marin Intl

Oct 20

SJU9:19 pmSan Juan Luis Munoz Marin Intl

23h 23m

1 stop

ISP8:42 pmIslip Long Island

$254

Find similar

JetBlue flights from Islip to Caribbean

Our best JetBlue deals on Islip to Caribbean flight tickets

JetBlue

Nov 22

ISP12:09 pmIslip Long Island

5h 26m

1 stop

MBJ5:35 pmMontego Bay Sangster Intl

Dec 1

MBJ10:44 amMontego Bay Sangster Intl

7h 17m

1 stop

ISP6:01 pmIslip Long Island

$361

Find similar

JetBlue

Oct 21

ISP4:24 pmIslip Long Island

7h 17m

1 stop

SJU11:41 pmSan Juan Luis Munoz Marin Intl

Oct 28

SJU6:00 amSan Juan Luis Munoz Marin Intl

7h 02m

1 stop

ISP1:02 pmIslip Long Island

$383

Find similar

JetBlue

Nov 19

ISP1:15 pmIslip Long Island

19h 51m

1 stop

MBJ9:06 amMontego Bay Sangster Intl

Nov 23

MBJ10:06 amMontego Bay Sangster Intl

8h 40m

1 stop

ISP6:46 pmIslip Long Island

$407

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 10/30

6:37 pm-1:54 am

1 stop7h 17m

San Juan Luis Munoz Marin Intl

Sun 11/2

3:59 am-10:37 am

1 stop7h 38m

$250

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Thu 10/16

9:37 pm-1:02 pm

1 stop15h 25m

San Juan Luis Munoz Marin Intl

Mon 10/20

9:19 pm-8:42 pm

1 stop23h 23m

$254

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 10/17

4:58 pm-12:00 pm

1 stop19h 02m

San Juan Luis Munoz Marin Intl

Mon 10/20

9:19 pm-8:42 pm

1 stop23h 23m

$269

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Fri 10/17

4:58 pm-2:30 am

1 stop9h 32m

San Juan Luis Munoz Marin Intl

Thu 10/23

3:40 am-10:37 am

1 stop6h 57m

$274

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Tue 12/2

8:09 pm-9:52 am

1 stop12h 43m

San Juan Luis Munoz Marin Intl

Sun 12/7

3:55 am-8:14 pm

1 stop17h 19m

$337

IslipMontego Bay

ISP - MBJ

ISPMBJ

Islip Long Island

Sat 11/22

12:09 pm-5:35 pm

1 stop5h 26m

Montego Bay Sangster Intl

Mon 12/1

10:44 am-6:01 pm

1 stop7h 17m

$361

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Wed 10/22

8:21 pm-3:16 pm

2 stops42h 55m

San Juan Luis Munoz Marin Intl

Tue 10/28

2:49 am-10:37 am

1 stop7h 48m

$367

IslipSan Juan

ISP - SJU

ISPSJU

Islip Long Island

Tue 10/21

4:24 pm-11:41 pm

1 stop7h 17m

San Juan Luis Munoz Marin Intl

Tue 10/28

6:00 am-1:02 pm

1 stop7h 02m

$383

IslipMontego Bay

ISP - MBJ

ISPMBJ

Islip Long Island

Tue 10/21

6:00 am-2:00 pm

1 stop9h 00m

Montego Bay Sangster Intl

Tue 10/28

1:00 pm-10:05 pm

2 stops8h 05m

$606

IslipMontego Bay

ISP - MBJ

ISPMBJ

Islip Long Island

Tue 10/21

6:00 am-1:25 pm

2 stops8h 25m

Montego Bay Sangster Intl

Tue 10/28

1:00 pm-10:05 pm

2 stops8h 05m

$627

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Islip to Caribbean

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

Prices

Airlines

What is the cheapest month to fly to Caribbean?

In general, November is the cheapest month to fly from Islip to Caribbean. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $204. If you don’t want to visit Caribbean in November, then you should wait until February to fly from Islip, when ticket prices are also cheap, with an average price of $215.

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

The cheapest day to depart from Islip to Caribbean is on a Friday when prices can be found 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.

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

In the evening is the cheapest time of day to fly from Islip to Caribbean when you can find flight prices for as low as $208. Flying to Caribbean in the evening is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive with an average ticket price of $390.

Can stopping save me money on Islip to Caribbean flights?

You could potentially save up to 26% on your flight if you consider stops on a Islip to Caribbean flight.

Cheap Islip to Caribbean flight deals and tips

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

Direct flights	None

There are no direct flights from Islip to Caribbean. There are no popular flight routes from Islip to Caribbean.

Search flight deals

When did momondo last update prices for flights from Islip Long Island Airport to Caribbean?
Prices for flights from Islip Long Island Airport to Caribbean were last updated today.
How many operators does momondo search for flights from Islip Long Island Airport to Caribbean?
As of September 2025, there are 4 operators available to choose from for flights from Islip Long Island Airport to Caribbean.
How old do you have to be to fly from Islip Long Island Airport to Caribbean?
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.
What documentation or ID do you need to fly to Caribbean?
The required travel and health documents for your Caribbean 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 Caribbean. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Islip to Caribbean

Compare and see reviews for airlines that fly from Islip to Caribbean with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $59	Free Cancellation	Rating 5.8 3,163 reviews	Search Frontier flights
JetBlue	PriceFrom $216	Free Cancellation	Rating 7.2 2,914 reviews	Search JetBlue flights
Delta	PriceFrom $350	Free Cancellation	Rating 7.9 7,973 reviews	Search Delta flights
Southwest	PriceFrom $463	Free Cancellation	Rating 8.0 4,244 reviews	Search Southwest flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Islip to Caribbean. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Caribbean from Islip on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Caribbean from Islip. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Islip to Caribbean flights. All you need is a valid email address and we will do the rest; it is that quick and easy.