$260 Cheap Flights from Islip (ISP) to St. Thomas (STT)

View $260 flight on Tue, Sep 16, 2025Opens in a new window

Popular airlines from MacArthur Airport (ISP) to Cyril E. King Airport (STT)

Cheap Flights from Islip to St. Thomas (ISP-STT)

Prices were available within the past 7 days and start at $260 for one-way flights and $349 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Tue, Nov 4 - Wed, Nov 12
ISP
Islip
STT
St. Thomas
$349 Roundtrip, found 8 hours ago
$349
Roundtrip
found 8 hours ago
Select JetBlue Airways flight, departing Tue, Nov 4 from Islip to St. Thomas, returning Wed, Nov 12, priced at $349 found 8 hours ago
JetBlue Airways
Mon, Nov 3 - Mon, Nov 17
ISP
Islip
STT
St. Thomas
$357 Roundtrip, found 2 days ago
$357
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Nov 3 from Islip to St. Thomas, returning Mon, Nov 17, priced at $357 found 2 days ago
JetBlue Airways
Fri, Nov 7 - Wed, Nov 12
ISP
Islip
STT
St. Thomas
$370 Roundtrip, found 8 hours ago
$370
Roundtrip
found 8 hours ago
Select JetBlue Airways flight, departing Fri, Nov 7 from Islip to St. Thomas, returning Wed, Nov 12, priced at $370 found 8 hours ago
JetBlue Airways
Mon, Nov 17 - Wed, Dec 3
ISP
Islip
STT
St. Thomas
$373 Roundtrip, found 2 days ago
$373
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Nov 17 from Islip to St. Thomas, returning Wed, Dec 3, priced at $373 found 2 days ago
JetBlue Airways
Wed, Jan 21 - Thu, Feb 5
ISP
Islip
STT
St. Thomas
$375 Roundtrip, found 4 days ago
$375
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Wed, Jan 21 from Islip to St. Thomas, returning Thu, Feb 5, priced at $375 found 4 days ago
JetBlue Airways
Mon, Nov 10 - Wed, Nov 12
ISP
Islip
STT
St. Thomas
$376 Roundtrip, found 8 hours ago
$376
Roundtrip
found 8 hours ago
Select JetBlue Airways flight, departing Mon, Nov 10 from Islip to St. Thomas, returning Wed, Nov 12, priced at $376 found 8 hours ago
JetBlue Airways
Sun, Nov 2 - Mon, Nov 17
ISP
Islip
STT
St. Thomas
$386 Roundtrip, found 2 days ago
$386
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Sun, Nov 2 from Islip to St. Thomas, returning Mon, Nov 17, priced at $386 found 2 days ago
JetBlue Airways
Mon, Nov 17 - Fri, Dec 5
ISP
Islip
STT
St. Thomas
$390 Roundtrip, found 2 days ago
$390
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Nov 17 from Islip to St. Thomas, returning Fri, Dec 5, priced at $390 found 2 days ago
JetBlue Airways
Tue, Nov 4 - Mon, Nov 17
ISP
Islip
STT
St. Thomas
$392 Roundtrip, found 2 days ago
$392
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Nov 4 from Islip to St. Thomas, returning Mon, Nov 17, priced at $392 found 2 days ago
Southwest Airlines
Mon, Mar 2 - Wed, Mar 11
ISP
Islip
STT
St. Thomas
$649 Roundtrip, found 4 days ago
$649
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Mon, Mar 2 from Islip to St. Thomas, returning Wed, Mar 11, priced at $649 found 4 days ago
Flights from Islip (ISP) to St. Thomas (STT)
Origin airport
MacArthur
Destination airport
Cyril E. King
Airlines serving
JetBlue Airways
Roundtrip price
$348
Distance
1624 mi

Islip to St. Thomas Flights

The cheapest times to fly from Islip to St. Thomas

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Islip to St. Thomas are during the month of November. You can find some of the cheapest flights from Islip to St. Thomas with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to St. Thomas

Sunday is one of the best days to book for cheap flights from Islip to St. Thomas: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Islip to St. Thomas

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Islip to St. Thomas in 2025. You can also book with separate airlines for your outbound and return journeys, from $260 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Islip to St. Thomas flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Islip to St. Thomas airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to Cyril E. King Airport (STT) cost?
Get a cheap one-way flight from $260 or cheap return flight from $349 from MacArthur Airport (ISP) to Cyril E. King Airport (STT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from MacArthur Airport (ISP) to Cyril E. King Airport (STT)?
November is the least expensive month to fly from ISP to STT. Timing your trip outside of the busy season is often the key to finding a great deal.
Which airlines fly direct from MacArthur Airport (ISP) to Cyril E. King Airport (STT)?
Direct flights aren't available from Islip, NY (ISP-MacArthur) to Cyril E. King Airport (STT). However, you'll find other airports with nonstop flights. Begin your journey at John F. Kennedy Intl. Airport (JFK) and fly straight to St. Thomas without a layover.
What is the cheapest airline that flies from MacArthur Airport (ISP) to Cyril E. King Airport (STT)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from ISP to STT. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from MacArthur Airport (ISP) to Cyril E. King Airport (STT)?
You'll need to hop on a flight with a layover if you're traveling from MacArthur Airport (ISP) to Cyril E. King Airport (STT). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from ISP to STT?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary based on a number of factors, such as the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from MacArthur Airport (ISP) to Cyril E. King Airport (STT)?
To reach Cyril E. King Airport (STT) on schedule, choose a flight that takes off from MacArthur Airport (ISP) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to Cyril E. King Airport (STT) last-minute?
Holding off until just before your trip to book a ticket from ISP to STT generally means paying more. While you might find some last-minute discounts, there's no guarantee. Allow some flexibility in your schedule to maximize your chances of scoring a bargain.
Is it cheaper to book an ISP to STT flight and hotel package?
Compared with arranging flights and hotels separately, booking an ISP to STT flight and hotel package with Expedia could lead to significant savings. What's more, managing everything in one place will take the hassle out of travel planning. Just pick your flights and select from our wide range of hotels, then tailor your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to Cyril E. King Airport (STT)?
It's generally possible to cancel or reschedule your ISP to STT flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.