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Saint Thomas Island

$569+ Cheap flights from Islip, NY (ISP) to Saint Thomas Island (STT)

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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — STT
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap flight deals from Islip to Saint Thomas Island

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Saint Thomas Island (STT). 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 junio 12, 2025.

Round-trip from

$569
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$388
From Islip Long Island to Saint Thomas Island Cyril E King
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Highest demand for flights based on searches. 6% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Islip to Saint Thomas Island

Cheapest flights from Islip to Saint Thomas Island
Explore the most affordable flight options available from Islip to Saint Thomas Island. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/88:00 amISP - STT
1 stop28h 30mMultiple Airlines
mar. 7/151:25 pmSTT - ISP
1 stop8h 33mMultiple Airlines
Deal found 6/10$569

Cheapflights Fare Finder

Customize your flight search to find flights from Islip to Saint Thomas Island 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 junio 12, 2025.
Use the filters below to find and compare flights from Islip to Saint Thomas Island that are best for you.

Fly from

Islip

Fly to

Saint Thomas Island

Route

Depart

Return

Price

IslipSaint Thomas Island

ISP - STT

ISPSTT

Islip Long Island

mar. 7/8

8:00 am-12:30 pm

1 stop28h 30m

Saint Thomas Island Cyril E King

mar. 7/15

1:25 pm-9:58 pm

1 stop8h 33m

$569

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Best time to book a flight from Islip to Saint Thomas Island

Have a flexible travel schedule? Discover the best time to fly to Saint Thomas Island 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 Saint Thomas Island

What is the cheapest month to book a flight from Islip, New York to Saint Thomas Island?

Currently, September is the cheapest month in which you can book a flight from Islip, New York to Saint Thomas Island (average of $433). Flying from Islip, New York to Saint Thomas Island in June is currently the most expensive (average of $650). 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 Saint Thomas Island. 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 Saint Thomas Island that include hotel bookings?

    Yes. In addition to deals on Islip to Saint Thomas Island flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Saint Thomas Island?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Saint Thomas Island.

  • Can I find deals for business class flights from Islip to Saint Thomas Island?

    Yes. Cheapflights offers flight deals from Islip to Saint Thomas Island 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 Saint Thomas Island?

    Currently, September is the cheapest month in which you can book a flight from Islip, New York to Saint Thomas Island (average of $433). Flying from Islip, New York to Saint Thomas Island in June is currently the most expensive (average of $650). 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

Traveling to a place near Islip?

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St. John

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