In terms of precipitation, rainfall in Santiago de los Caballeros ranges from 3.0 - 11.6 inches per month. December is typically the wettest month, when rainfall can reach 11.6 in. July is typically the driest time to visit Santiago de los Caballeros when rainfall is around 3.0 in.

If weather is an important factor for your trip to Santiago de los Caballeros, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 73.4 F).

How far in advance should I book a flight from Islip, New York to Santiago de los Caballeros?

To save on the cost of your flight from Islip, New York to Santiago de los Caballeros, book at least 21 days before your planned departure. Booking around this time can save you about 34% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $416 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $559.

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

Our data shows that September tends to be the cheapest month to fly to Santiago de los Caballeros from Islip, New York. Users have commonly found prices around $458 for the month, but tickets can be as low as $276. Due to multiple factors, prepare for potentially higher prices in December.

What is the cheapest time of day to fly from ISP to STI?

When flying from Islip, New York to Santiago de los Caballeros, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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.

$241+ Flights from Islip, NY to Santiago de los Caballeros

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Cheap flight deals from Islip to Santiago de los Caballeros

Round-trip from	$837 (Mytrip)
One-way from	$241 (JetBlue)
Popular in	December
Cheapest in	September
Average price	$580

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. 6% potential increase in price ($31 potential increase over avg. RT price).

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Cheapest flight prices on average. 5% potential price decrease ($22 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find 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 July 3, 2025.

Sun 8/172:19 pmISP - STI

2 stops18h 56mMultiple Airlines

Sun 8/2410:20 amSTI - ISP

3 stops23h 44mMultiple Airlines

Deal found 7/3

$837

Best flights from Islip to Santiago de los Caballeros
Discover carefully curated flight deals from Islip to Santiago de los Caballeros that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Sun 8/172:19 pmISP - STI

2 stops18h 56mMultiple Airlines

Sun 8/2410:20 amSTI - ISP

3 stops23h 44mMultiple Airlines

Deal found 7/3

$837

Last-minute flights from Islip to Santiago de los Caballeros
Discover last-minute flight deals from Islip to Santiago de los Caballeros. Data last updated July 3, 2025 and is based on user searches.

Thu 7/104:33 pmISP - STI

1 stop9h 05mMultiple Airlines

Mon 8/410:12 amSTI - ISP

1 stop24h 22mMultiple Airlines

Deal found 7/1

$940

Sun 8/172:19 pmISP - STI

2 stops18h 56mMultiple Airlines

Sun 8/2410:20 amSTI - ISP

3 stops23h 44mMultiple Airlines

Deal found 7/3

$837

One-way flights from Islip to Santiago de los Caballeros
Search for one-way flight options from Islip to Santiago de los Caballeros. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Thu 7/241:51 pmISP - STI

1 stop8h 18mJetBlue

Deal found 7/2

$241

Cheapflights Fare Finder

Use the filters below to find and compare flights from Islip to Santiago de los Caballeros that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Sun 8/17

2:19 pm-9:15 am

2 stops18h 56m

Santiago de los Caballeros

Sun 8/24

10:20 am-10:04 am

3 stops23h 44m

$837

IslipSantiago de los Caballeros

ISP - STI

ISPSTI

Islip Long Island

Thu 7/24

1:51 pm-10:09 pm

1 stop8h 18m

$241

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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, May is the cheapest month in which you can book a flight from Islip, New York to Santiago de los Caballeros (average of $347). Flying from Islip, New York to Santiago de los Caballeros in July is currently the most expensive (average of $629). 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.

Reviews of airlines servicing Santiago de los Caballeros

Get a feel of what it's like to fly with JetBlue from Islip to Santiago de los Caballeros by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

JetBlue

7.3

Good

2,916 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Feb 2025

JFK - CHS

Boarding took a very long time, in fact we were delayed by at least 30mins. There wasn’t many options for snacks and there was only water. The pilot did an excellent job

JetBlue

7.3

Good

2,916 reviews

JetBlue

7.3

Good

2,916 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Feb 2025

JFK - CHS

Boarding took a very long time, in fact we were delayed by at least 30mins. There wasn’t many options for snacks and there was only water. The pilot did an excellent job

Related info for your journey

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, May is the cheapest month in which you can book a flight from Islip, New York to Santiago de los Caballeros (average of $347). Flying from Islip, New York to Santiago de los Caballeros in July is currently the most expensive (average of $629). 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.

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$241+ 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 7/24. Fares are subject to change and may not be available on all flights or dates of travel.

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

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Islip to Santiago de los Caballeros

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Find flight deals from Islip to Santiago de los Caballeros

Cheapest flights from Islip to Santiago de los CaballerosExplore 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 July 3, 2025.

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 July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Islip to Santiago de los Caballeros that are best for you.

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.

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?

Reviews of airlines servicing Santiago de los Caballeros

Get a feel of what it's like to fly with JetBlue from Islip to Santiago de los Caballeros by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.

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

How can I 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?

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

Browse thousands of different options on Cheapflights for your next trip

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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 July 3, 2025.