$346 Cheap Flights from Islip (ISP) to St. Thomas (STT)

View $346 flight on Sat, Feb 7, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $346 for one-way flights and $358 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Tue, Nov 18 - Thu, Dec 4
ISP
Islip
STT
St. Thomas
$358 Roundtrip, found 2 days ago
$358
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Nov 18 from Islip to St. Thomas, returning Thu, Dec 4, priced at $358 found 2 days ago
JetBlue Airways
Tue, Oct 28 - Wed, Nov 12
ISP
Islip
STT
St. Thomas
$370 Roundtrip, found 6 days ago
$370
Roundtrip
found 6 days ago
Select JetBlue Airways flight, departing Tue, Oct 28 from Islip to St. Thomas, returning Wed, Nov 12, priced at $370 found 6 days ago
JetBlue Airways
Tue, Nov 18 - Wed, Dec 3
ISP
Islip
STT
St. Thomas
$371 Roundtrip, found 2 days ago
$371
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Nov 18 from Islip to St. Thomas, returning Wed, Dec 3, priced at $371 found 2 days ago
JetBlue Airways
Tue, Nov 18 - Thu, Dec 4
ISP
Islip
STT
St. Thomas
$381 Roundtrip, found 3 days ago
$381
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Tue, Nov 18 from Islip to St. Thomas, returning Thu, Dec 4, priced at $381 found 3 days ago
JetBlue Airways
Mon, Nov 17 - Wed, Dec 3
ISP
Islip
STT
St. Thomas
$389 Roundtrip, found 2 days ago
$389
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Nov 17 from Islip to St. Thomas, returning Wed, Dec 3, priced at $389 found 2 days ago
JetBlue Airways
Sun, Nov 16 - Thu, Dec 4
ISP
Islip
STT
St. Thomas
$390 Roundtrip, found 2 days ago
$390
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Sun, Nov 16 from Islip to St. Thomas, returning Thu, Dec 4, priced at $390 found 2 days ago
JetBlue Airways
Tue, Nov 18 - Tue, Dec 2
ISP
Islip
STT
St. Thomas
$393 Roundtrip, found 2 days ago
$393
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Nov 18 from Islip to St. Thomas, returning Tue, Dec 2, priced at $393 found 2 days ago
JetBlue Airways
Mon, Nov 17 - Thu, Dec 4
ISP
Islip
STT
St. Thomas
$398 Roundtrip, found 3 days ago
$398
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Mon, Nov 17 from Islip to St. Thomas, returning Thu, Dec 4, priced at $398 found 3 days ago
JetBlue Airways
Sun, Nov 16 - Wed, Dec 3
ISP
Islip
STT
St. Thomas
$403 Roundtrip, found 2 days ago
$403
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Sun, Nov 16 from Islip to St. Thomas, returning Wed, Dec 3, priced at $403 found 2 days ago
Southwest Airlines
Thu, Feb 26 - Mon, Mar 2
ISP
Islip
STT
St. Thomas
$939 Roundtrip, found 2 days ago
$939
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Thu, Feb 26 from Islip to St. Thomas, returning Mon, Mar 2, priced at $939 found 2 days ago

Alternative airports near St. Thomas

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Cyril E. King STT. Cheapest option available. Flights from $958
STT
Cyril E. King
Cheapest
Flights from $958

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 $346 or cheap return flight from $358 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.

Travel information

Origin airport
MacArthur
Destination airport
Cyril E. King
Airlines serving
JetBlue Airways, Southwest Airlines
Roundtrip price
$358
Distance
1624 mi

Book with confidence

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 $346 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.

 

Islip to St. Thomas Flights

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*Available to One Key members.