$278 Cheap Flights from San Juan (SJU) to Watertown (ATY)

View $278 flight on Sat, Jan 10, 2026Opens in a new window

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to Watertown, SD (ATY-Watertown Regional)

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Cheap Flights from San Juan to Watertown (SJU-ATY)

Prices were available within the past 7 days and start at $278 for one-way flights and $1,052 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Dec 20 - Mon, Dec 29
SJU
San Juan
ATY
Watertown
$1,052 Roundtrip, found 4 days ago
$1,052
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Dec 20 from San Juan to Watertown, returning Mon, Dec 29, priced at $1,052 found 4 days ago
United
Fri, Dec 19 - Sun, Dec 28
SJU
San Juan
ATY
Watertown
$1,102 Roundtrip, found 4 days ago
$1,102
Roundtrip
found 4 days ago
Select United flight, departing Fri, Dec 19 from San Juan to Watertown, returning Sun, Dec 28, priced at $1,102 found 4 days ago
Delta
Sat, Dec 20 - Mon, Dec 29
SJU
San Juan
ATY
Watertown
$1,114 Roundtrip, found 4 days ago
$1,114
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Dec 20 from San Juan to Watertown, returning Mon, Dec 29, priced at $1,114 found 4 days ago
Delta
Fri, Dec 19 - Sun, Dec 28
SJU
San Juan
ATY
Watertown
$1,123 Roundtrip, found 4 days ago
$1,123
Roundtrip
found 4 days ago
Select Delta flight, departing Fri, Dec 19 from San Juan to Watertown, returning Sun, Dec 28, priced at $1,123 found 4 days ago
United
Fri, Dec 19 - Sun, Dec 28
SJU
San Juan
ATY
Watertown
$1,137 Roundtrip, found 4 days ago
$1,137
Roundtrip
found 4 days ago
Select United flight, departing Fri, Dec 19 from San Juan to Watertown, returning Sun, Dec 28, priced at $1,137 found 4 days ago
United
Sat, Dec 20 - Mon, Dec 29
SJU
San Juan
ATY
Watertown
$1,144 Roundtrip, found 4 days ago
$1,144
Roundtrip
found 4 days ago
Select United flight, departing Sat, Dec 20 from San Juan to Watertown, returning Mon, Dec 29, priced at $1,144 found 4 days ago
Delta
Sat, Dec 20 - Mon, Dec 29
SJU
San Juan
ATY
Watertown
$1,176 Roundtrip, found 4 days ago
$1,176
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, Dec 20 from San Juan to Watertown, returning Mon, Dec 29, priced at $1,176 found 4 days ago
United
Sat, Dec 20 - Mon, Dec 29
SJU
San Juan
ATY
Watertown
$1,182 Roundtrip, found 4 days ago
$1,182
Roundtrip
found 4 days ago
Select United flight, departing Sat, Dec 20 from San Juan to Watertown, returning Mon, Dec 29, priced at $1,182 found 4 days ago
United
Fri, Dec 19 - Sun, Dec 28
SJU
San Juan
ATY
Watertown
$1,183 Roundtrip, found 4 days ago
$1,183
Roundtrip
found 4 days ago
Select United flight, departing Fri, Dec 19 from San Juan to Watertown, returning Sun, Dec 28, priced at $1,183 found 4 days ago
Delta
Fri, Dec 19 - Sun, Dec 28
SJU
San Juan
ATY
Watertown
$1,184 Roundtrip, found 4 days ago
$1,184
Roundtrip
found 4 days ago
Select Delta flight, departing Fri, Dec 19 from San Juan to Watertown, returning Sun, Dec 28, priced at $1,184 found 4 days ago

Frequently asked questions

How much does a flight from Luis Munoz Marin Intl. Airport (SJU) to Watertown Regional Airport (ATY) cost?
Get a cheap one-way flight from $278 or cheap return flight from $1,052 from Luis Munoz Marin Intl. Airport (SJU) to Watertown Regional Airport (ATY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Luis Munoz Marin Intl. Airport (SJU) to Watertown Regional Airport (ATY)?
December is the most affordable month to fly from SJU to ATY. Traveling during quieter months is often the key to finding better deals on flights.
What is the cheapest airline that flies from Luis Munoz Marin Intl. Airport (SJU) to Watertown Regional Airport (ATY)?
To find the cheapest airline that'll fly you from SJU to ATY, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to Watertown Regional Airport (ATY)?
Nonstop flights from Luis Munoz Marin Intl. Airport (SJU) to Watertown Regional Airport (ATY) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SJU to ATY?
Typically you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Luis Munoz Marin Intl. Airport (SJU) to Watertown Regional Airport (ATY)?
To land at Watertown Regional Airport (ATY) on schedule, opt for a flight that takes off from Luis Munoz Marin Intl. Airport (SJU) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Luis Munoz Marin Intl. Airport (SJU) to Watertown Regional Airport (ATY) last-minute?
Booking your flight from SJU to ATY shortly before your trip is usually more expensive. But if there's some wiggle room with your departure times and dates, you could grab a cheap last-minute fare.
Is it cheaper to book a SJU to ATY flight and hotel package?
Compared with arranging hotels and flights separately, booking a SJU to ATY flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one place will take the hassle out of travel planning. Just pick your flights and choose from our wide range of hotels, then personalize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to Watertown Regional Airport (ATY)?
In most instances, you're able to cancel or reschedule your SJU to ATY flight. However, there may be additional charges, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you want further information, go to our Customer Service portal.

Travel information

Origin airport
Luis Munoz Marin Intl.
Destination airport
Watertown Regional
Roundtrip price
$1,052
Distance
2559 mi

Book with confidence

San Juan to Watertown Flights

The cheapest times to fly from San Juan to Watertown

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 Watertown are during the month of December. You can find some of the cheapest flights from San Juan to Watertown with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Juan to Watertown

Sunday is one of the best days to book for cheap flights from San Juan to Watertown: 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 Watertown

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 Watertown in 2025. You can also book with separate airlines for your outbound and return journeys, from $278 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 Watertown 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 Watertown 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.

 

San Juan to Watertown Flights

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*Available to One Key members.