Cheap Seaborne Airlines flights San Juan (SJU) to St. Thomas (STT)

Use the “Price (lowest to highest)” filter on Expedia to search for cheap Seaborne Airlines round-trip flights from SJU to STT. Affordable one-way fares are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

September is one of the most affordable months to jet away to St. Thomas with Seaborne Airlines. You could also find great prices on one-way and round-trip fares in October.

Scoring the best Seaborne Airlines deals from SJU to STT is typically all about timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. What’s more, you can pocket 17% on average by buying your tickets on a Sunday rather than a Friday, which is often the most expensive day to book.* It’s a good idea to start checking out flights about one month before your travel dates.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To figure out if there’s a direct route from SJU to STT with Seaborne Airlines or any other carriers, check the “Nonstop” box when searching for tickets.

Find Seaborne Airlines’s earliest flights from SJU to STT by checking our “Morning” and “Early Morning” filters. Not only will you arrive at your destination sooner, early departures also experience 20% fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Get on a Seaborne Airlines flight from Luis Munoz Marin Intl. Airport (SJU) to St. Thomas, and you’ll likely come in to Cyril E. King Airport (STT). This is the airline’s primary hub here.

With Seaborne Airlines, you can fly standard economy from SJU to STT with a small personal item and 1 cabin bag. Your carry-on bag should be no larger than 14 inches x 14 inches x 9 inches and weigh under 30 lb. Exceeding these restrictions could lead to additional fees, so read your airline’s latest policies before booking.

It’s usually possible to change or cancel your flight, although there may be additional fees if your booking was made more than 24 hours ago. Need to keep your options open? Make use of our “No cancel fee” or “Changes included” filter to find flights that won’t charge extra if you have to adjust your plans. To modify your booking, visit “Trips,” select your flight and click on “Manage Booking” for more details.