$52 Cheap Flights from San Juan (SJU) to St. Thomas (STT)

View $52 flight on Fri, Aug 8, 2025Opens in a new window

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT)

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Cheap Flights from San Juan to St. Thomas (SJU-STT)

Prices were available within the past 7 days and start at $52 for one-way flights and $68 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Aug 4 - Mon, Aug 11
SJU
San Juan
STT
St. Thomas
$68 Roundtrip, just found
$68
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Aug 4 from San Juan to St. Thomas, returning Mon, Aug 11, priced at $68 just found
Frontier Airlines
Mon, Aug 11 - Mon, Aug 18
SJU
San Juan
STT
St. Thomas
$83 Roundtrip, just found
$83
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Aug 11 from San Juan to St. Thomas, returning Mon, Aug 18, priced at $83 just found
Frontier Airlines
Fri, Aug 1 - Mon, Aug 4
SJU
San Juan
STT
St. Thomas
$86 Roundtrip, just found
$86
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Aug 1 from San Juan to St. Thomas, returning Mon, Aug 4, priced at $86 just found
Frontier Airlines
Mon, Jul 28 - Fri, Aug 15
SJU
San Juan
STT
St. Thomas
$89 Roundtrip, found 8 hours ago
$89
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Mon, Jul 28 from San Juan to St. Thomas, returning Fri, Aug 15, priced at $89 found 8 hours ago
Frontier Airlines
Mon, Aug 11 - Fri, Aug 15
SJU
San Juan
STT
St. Thomas
$102 Roundtrip, found 7 hours ago
$102
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Mon, Aug 11 from San Juan to St. Thomas, returning Fri, Aug 15, priced at $102 found 7 hours ago
Frontier Airlines
Fri, Aug 8 - Fri, Aug 15
SJU
San Juan
STT
St. Thomas
$104 Roundtrip, just found
$104
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Aug 8 from San Juan to St. Thomas, returning Fri, Aug 15, priced at $104 just found
Frontier Airlines
Mon, Aug 4 - Fri, Aug 8
SJU
San Juan
STT
St. Thomas
$108 Roundtrip, found 7 hours ago
$108
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Mon, Aug 4 from San Juan to St. Thomas, returning Fri, Aug 8, priced at $108 found 7 hours ago
JetBlue Airways
Sat, Aug 23 - Sun, Aug 24
SJU
San Juan
STT
St. Thomas
$109 Roundtrip, just found
$109
Roundtrip
just found
Select JetBlue Airways flight, departing Sat, Aug 23 from San Juan to St. Thomas, returning Sun, Aug 24, priced at $109 just found
Spirit Airlines
Thu, Aug 7 - Mon, Aug 11
SJU
San Juan
STT
St. Thomas
$195 Roundtrip, found 2 hours ago
$195
Roundtrip
found 2 hours ago
Select Spirit Airlines flight, departing Thu, Aug 7 from San Juan to St. Thomas, returning Mon, Aug 11, priced at $195 found 2 hours ago
Silver Airways
Mon, Jul 14 - Tue, Jul 22
SJU
San Juan
STT
St. Thomas
$217 Roundtrip, just found
$217
Roundtrip
just found
Select Silver Airways flight, departing Mon, Jul 14 from San Juan to St. Thomas, returning Tue, Jul 22, priced at $217 just found

Find the cheapest month to fly from San Juan (SJU) to St. Thomas (STT)

August is typically the cheapest month to fly

From $48 - $128 per traveler.

Graph displaying average flight prices per month

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Flights from San Juan (SJU) to St. Thomas (STT)
Origin airport
Luis Munoz Marin Intl.
Destination airport
Cyril E. King
Airlines serving
American Airlines, Cape Air, Frontier Airlines, JetBlue Airways, Silver Airways, Spirit Airlines
Roundtrip price
$68
Distance
68 mi

San Juan to St. Thomas Flights

The cheapest times to fly from San Juan 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 San Juan to St. Thomas are during the month of August. You can find some of the cheapest flights from San Juan to St. Thomas with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Juan to St. Thomas

Sunday is one of the best days to book for cheap flights from San Juan 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 San Juan 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 San Juan to St. Thomas in 2025. You can also book with separate airlines for your outbound and return journeys, from $52 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 San Juan 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 San Juan 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 Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT) cost?
You'll find cheap return tickets from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT) starting from $68. Snag a seat and get ready to go. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Frontier Airlines flight leaving SJU on August 4 2025 and touching down at STT. The price was last updated on July 8 2025 and has not changed since.
What is the cheapest month to fly from SJU to STT?
The cheapest flights from SJU to STT are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT)?
Skip the stopovers and travel nonstop from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT) with 4 carriers, including:

  • Cape Air
  • Silver Airways
  • JetBlue Airways

What is the cheapest airline that flies from SJU to STT?
Book a flight from SJU to STT with Frontier Airlines. This carrier currently has the lowest one-way fare on this route, starting from $52. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SJU on August 15 2025. Prices were last updated on July 8 2025 and have not changed since.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT)?
Each day, an average of 10 nonstop flights take off from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT). Choose the departure time that best fits your schedule.
What are the most popular departure times for flights from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT)?
More passengers fly between SJU and STT at 4 PM than at any other point in the day. Prefer a quieter experience? Try choosing a quieter departure window and there's a chance you'll save on your ticket as well.
What day of the week has the most flights from SJU to STT?
Fly on a Saturday if you're searching for the biggest selection of flights from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT).
What is the earliest flight from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT)?
The earliest flight out of Luis Munoz Marin Intl. Airport (SJU) is at around 7:15AM UTC-4. Hop on this flight and you'll reach Cyril E. King Airport (STT) at approximately 7:50AM UTC-4. The total time in the air is 35m.
How long does it take to fly from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT)?
The average flight duration from SJU to STT is 35 minutes, covering a distance of 70 mi.
What airline has the least delays from SJU to STT?
Silver Airways has the strongest track record for on-time direct flights from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT), with an on-time score of 80%. Use the Expedia App to check your journey status before you jet off and get real-time alerts about any changes.
What is the best time to fly from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT)?
Book a flight from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT) that takes off before 3 PM to reduce the likelihood of delays. Departures after this hour are on average 22% more likely to be canceled.**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.
What airports do you fly into for St. Thomas from Luis Munoz Marin Intl. Airport (SJU)?
You can touch down at Cyril E. King Airport (STT) or Henry E. Rohlsen Airport (STX) when you travel to St. Thomas on a direct flight from Luis Munoz Marin Intl. Airport (SJU).
Is it cheaper to buy a plane ticket from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT) last-minute?
Holding off until just before your departure to book your flight from SJU to STT generally means paying more. While you may find some last-minute discounts, they aren't always guaranteed. Keep your travel plans flexible for a better chance of landing a bargain.
Is it cheaper to book a SJU to STT flight and hotel package?
You'll typically save money by booking a SJU to STT flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. Once you've chosen your preferred accommodations and flights, consider adding extras including activities, car rentals and tours.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to Cyril E. King Airport (STT)?
You can usually reschedule or cancel your SJU to STT flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

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