HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Santiago de los Caballeros

$424+ Cheap flights from Islip, NY (ISP) to Santiago de los Caballeros (STI)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/21. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — STI
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Islip to Santiago de los Caballeros with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Islip to Santiago de los Caballeros

Cheapest flights from Islip to Santiago de los Caballeros
Explore the most affordable flight options available from Islip to Santiago de los Caballeros. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This JetBlue deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/218:25 pm
ISP
-
STI
1 stop11h 35m
JetBlue
Sat 3/289:13 am
STI
-
ISP
1 stop10h 14m
JetBlue
Deal found 1/19$424
This Expedia deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/59:39 am
ISP
-
STI
1 stop21h 40m
JetBlue
Thu 3/129:13 am
STI
-
ISP
1 stop10h 17m
JetBlue
Deal found 1/19$526
This JetBlue deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:34 pm
ISP
-
STI
1 stop11h 29m
JetBlue
Mon 5/48:31 am
STI
-
ISP
1 stop11h 08m
JetBlue
Deal found 1/19$583
This JetBlue deal was found by Cheapflights users on 1/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/278:22 pm
ISP
-
STI
1 stop11h 38m
JetBlue
Mon 4/69:15 am
STI
-
ISP
1 stop13h 31m
JetBlue
Deal found 1/18$644
This Expedia deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/139:29 am
ISP
-
STI
1 stop21h 50m
JetBlue
Mon 2/169:29 am
STI
-
ISP
1 stop24h 10m
JetBlue
Deal found 1/20$1,165

Find flight deals from Islip to Santiago de los Caballeros

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Santiago de los Caballeros (STI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Ovago
2 stars

Round-trip from

$424
(JetBlue)

Popular in

December

Cheapest in

March

Average price

$404
Provider with most accurate pricing for Islip Long Island-Santiago de los Caballeros flight deals.
Search Deals
Provider most trusted by Cheapflights users for Islip Long Island-Santiago de los Caballeros flights.
Search Deals
From Islip Long Island to Santiago de los Caballeros
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Santiago de los Caballeros 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, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from Islip to Santiago de los Caballeros that are best for you.

Fly from

Islip

Fly to

Santiago de los Caballeros

Route

Depart

Return

Price

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Sat 3/21

8:25 pm-8:00 am

1 stop11h 35m

Santiago de los Caballeros

Sat 3/28

9:13 am-7:27 pm

1 stop10h 14m

$424

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Thu 3/5

9:39 am-8:19 am

1 stop21h 40m

Santiago de los Caballeros

Thu 3/12

9:13 am-7:30 pm

1 stop10h 17m

$526

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Fri 5/1

8:34 pm-8:03 am

1 stop11h 29m

Santiago de los Caballeros

Mon 5/4

8:31 am-7:39 pm

1 stop11h 08m

$583

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Fri 3/27

8:22 pm-8:00 am

1 stop11h 38m

Santiago de los Caballeros

Mon 4/6

9:15 am-10:46 pm

1 stop13h 31m

$644

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Fri 2/13

9:29 am-8:19 am

1 stop21h 50m

Santiago de los Caballeros

Mon 2/16

9:29 am-8:39 am

1 stop24h 10m

$1,165

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Thu 3/12

8:25 pm-8:00 am

1 stop11h 35m

$559

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Compare providers for flights from Islip to Santiago de los Caballeros

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Santiago de los Caballeros in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Santiago de los Caballeros flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Santiago de los Caballeros flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-Santiago de los Caballeros flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Santiago de los Caballeros flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Santiago de los Caballeros flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Islip to Santiago de los Caballeros

Have a flexible travel schedule? Discover the best time to fly to Santiago de los Caballeros from Islip with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Islip to Santiago de los Caballeros

What is the cheapest month to book a flight from Islip, New York to Santiago de los Caballeros?

Currently, October is the cheapest month in which you can book a flight from Islip, New York to Santiago de los Caballeros (average of $192). Flying from Islip, New York to Santiago de los Caballeros in August is currently the most expensive (average of $256). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Islip to Santiago de los Caballeros. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Islip, New York to Santiago de los Caballeros?

    JetBlue can get you from Islip, New York to Santiago de los Caballeros in just under 11h 35m. Your travel time can differ by up to . The distance between Islip, New York and Santiago de los Caballeros is about 1484 mi.

  • Can I find deals for flights from Islip to Santiago de los Caballeros that include hotel bookings?

    Yes. In addition to deals on Islip to Santiago de los Caballeros flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Santiago de los Caballeros?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Santiago de los Caballeros.

  • Can I find deals for business class flights from Islip to Santiago de los Caballeros?

    Yes. Cheapflights offers flight deals from Islip to Santiago de los Caballeros by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to Santiago de los Caballeros?

    Currently, October is the cheapest month in which you can book a flight from Islip, New York to Santiago de los Caballeros (average of $192). Flying from Islip, New York to Santiago de los Caballeros in August is currently the most expensive (average of $256). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Islip to Santiago de los Caballeros

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Santiago de los Caballeros flights
Newark to Punta Cana flights
John F Kennedy Intl to Punta Cana flights
Newark to Santiago de los Caballeros flights
John F Kennedy Intl to Santo Domingo flights
Newark to Santo Domingo flights
LaGuardia to Punta Cana flights
LaGuardia to Santo Domingo flights
LaGuardia to Santiago de los Caballeros flights
John F Kennedy Intl to Puerto Plata flights
Newark to Puerto Plata flights
LaGuardia to Puerto Plata flights
Buffalo to Punta Cana flights
White Plains to Punta Cana flights
Syracuse to Punta Cana flights
Rochester to Punta Cana flights
Albany to Punta Cana flights
Rochester to Santo Domingo flights
John F Kennedy Intl to La Romana flights
Buffalo to Santo Domingo flights
White Plains to Santo Domingo flights
Islip to Santo Domingo flights
Buffalo to Puerto Plata flights
Syracuse to Santo Domingo flights
Albany to Santo Domingo flights
Stewart to Punta Cana flights
Albany to Puerto Plata flights
Albany to Santiago de los Caballeros flights
Syracuse to Santiago de los Caballeros flights
LaGuardia to Nagua flights
Ithaca to Punta Cana flights
Newark to Nagua flights
Islip to Punta Cana flights
Stewart to Santiago de los Caballeros flights
Stewart to Santo Domingo flights
Syracuse to Puerto Plata flights
Buffalo to Santiago de los Caballeros flights
Rochester to La Romana flights
Rochester to Puerto Plata flights
Buffalo to La Romana flights
Islip to Puerto Plata flights
Stewart to Puerto Plata flights
Niagara Falls to Punta Cana flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.