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Santiago de los Caballeros

$375+ Cheap flights from Islip, NY (ISP) to Santiago de los Caballeros (STI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/24. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — STI
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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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 December 4, 2025.

This JetBlue deal was found by Cheapflights users on 12/3. 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.
Wed 12/247:40 pmISP - STI
1 stop13h 35mJetBlue
Thu 1/111:25 amSTI - ISP
1 stop8h 20mJetBlue
Deal found 12/3$925
This JetBlue deal was found by Cheapflights users on 12/3. 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.
Thu 12/257:40 pmISP - STI
1 stop13h 35mJetBlue
Thu 1/111:25 amSTI - ISP
1 stop8h 20mJetBlue
Deal found 12/3$1,268
This JetBlue deal was found by Cheapflights users on 12/3. 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 12/277:50 pmISP - STI
1 stop13h 25mJetBlue
Tue 12/3011:25 amSTI - ISP
1 stop8h 20mJetBlue
Deal found 12/3$1,399
This JetBlue deal was found by Cheapflights users on 12/2. 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 12/277:50 pmISP - STI
1 stop13h 25mJetBlue
Mon 1/511:25 amSTI - ISP
1 stop8h 20mJetBlue
Deal found 12/2$1,456

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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$476
(Expedia)

One-way from

$375
(JetBlue)

Popular in

December

Cheapest in

March

Average price

$639
Provider with most accurate pricing for Islip Long Island-Santiago de los Caballeros flight deals.
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Provider most trusted by Cheapflights users for Islip Long Island-Santiago de los Caballeros flights.
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From Islip Long Island to Santiago de los Caballeros
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One-way flight from Islip Long Island to Santiago de los Caballeros
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Highest demand for flights based on searches. 4% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 4, 2025.
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

Tue 1/27

12:25 pm-11:02 am

1 stop21h 37m

Santiago de los Caballeros

Sat 3/28

9:07 am-7:27 pm

1 stop10h 20m

$476

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Wed 12/24

7:40 pm-10:15 am

1 stop13h 35m

Santiago de los Caballeros

Thu 1/1

11:25 am-6:45 pm

1 stop8h 20m

$925

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Thu 12/25

7:40 pm-10:15 am

1 stop13h 35m

Santiago de los Caballeros

Thu 1/1

11:25 am-6:45 pm

1 stop8h 20m

$1,268

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Sat 12/27

7:50 pm-10:15 am

1 stop13h 25m

Santiago de los Caballeros

Tue 12/30

11:25 am-6:45 pm

1 stop8h 20m

$1,399

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Sat 12/27

7:50 pm-10:15 am

1 stop13h 25m

Santiago de los Caballeros

Mon 1/5

11:25 am-6:45 pm

1 stop8h 20m

$1,456

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Wed 12/24

7:40 pm-10:15 am

1 stop13h 35m

$375

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Mon 12/29

7:40 pm-10:15 am

1 stop13h 35m

$476

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Tue 12/23

7:40 pm-10:15 am

1 stop13h 35m

$566

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Sun 12/21

7:40 pm-10:15 am

1 stop13h 35m

$572

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Mon 12/22

7:40 pm-10:15 am

1 stop13h 35m

$641

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

Showing 1-10 of 13 results
1
2

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 December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-Santiago de los Caballeros flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, March is the cheapest month in which you can book a flight from Islip, New York to Santiago de los Caballeros (average of $188). 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 21h 37m. 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, March is the cheapest month in which you can book a flight from Islip, New York to Santiago de los Caballeros (average of $188). 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

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Alternative routes for Islip to Santiago de los Caballeros

See prices for flight routes from nearby airports that may be better suited for you.
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