$218 Cheap Flights from San Antonio (SAT) to Watertown (ATY)

View $218 flight on Fri, Aug 15, 2025Opens in a new window

Popular airlines from San Antonio International Airport (SAT) to Watertown, SD (ATY-Watertown Regional)

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Cheap Flights from San Antonio to Watertown (SAT-ATY)

Prices were available within the past 7 days and start at $218 for one-way flights and $244 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Aug 16 - Thu, Aug 21
SAT
San Antonio
ATY
Watertown
$244 Roundtrip, found 3 days ago
$244
Roundtrip
found 3 days ago
Select Delta flight, departing Sat, Aug 16 from San Antonio to Watertown, returning Thu, Aug 21, priced at $244 found 3 days ago
Delta
Fri, Aug 8 - Tue, Aug 26
SAT
San Antonio
ATY
Watertown
$254 Roundtrip, found 3 days ago
$254
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Aug 8 from San Antonio to Watertown, returning Tue, Aug 26, priced at $254 found 3 days ago
Delta
Mon, Aug 4 - Tue, Aug 12
SAT
San Antonio
ATY
Watertown
$259 Roundtrip, found 3 days ago
$259
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Aug 4 from San Antonio to Watertown, returning Tue, Aug 12, priced at $259 found 3 days ago
Delta
Sun, Aug 10 - Wed, Aug 27
SAT
San Antonio
ATY
Watertown
$269 Roundtrip, found 3 days ago
$269
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Aug 10 from San Antonio to Watertown, returning Wed, Aug 27, priced at $269 found 3 days ago
United
Mon, Aug 11 - Sat, Aug 16
SAT
San Antonio
ATY
Watertown
$271 Roundtrip, found 3 days ago
$271
Roundtrip
found 3 days ago
Select United flight, departing Mon, Aug 11 from San Antonio to Watertown, returning Sat, Aug 16, priced at $271 found 3 days ago
Delta
Fri, Aug 1 - Sat, Aug 2
SAT
San Antonio
ATY
Watertown
$274 Roundtrip, found 3 days ago
$274
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Aug 1 from San Antonio to Watertown, returning Sat, Aug 2, priced at $274 found 3 days ago
Delta
Mon, Aug 4 - Sat, Aug 9
SAT
San Antonio
ATY
Watertown
$284 Roundtrip, found 3 days ago
$284
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Aug 4 from San Antonio to Watertown, returning Sat, Aug 9, priced at $284 found 3 days ago
United
Tue, Aug 12 - Sun, Aug 17
SAT
San Antonio
ATY
Watertown
$288 Roundtrip, found 3 days ago
$288
Roundtrip
found 3 days ago
Select United flight, departing Tue, Aug 12 from San Antonio to Watertown, returning Sun, Aug 17, priced at $288 found 3 days ago
Delta
Sat, Aug 16 - Mon, Aug 18
SAT
San Antonio
ATY
Watertown
$294 Roundtrip, found 3 days ago
$294
Roundtrip
found 3 days ago
Select Delta flight, departing Sat, Aug 16 from San Antonio to Watertown, returning Mon, Aug 18, priced at $294 found 3 days ago
Delta
Sun, Aug 10 - Sat, Aug 30
SAT
San Antonio
ATY
Watertown
$304 Roundtrip, found 3 days ago
$304
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Aug 10 from San Antonio to Watertown, returning Sat, Aug 30, priced at $304 found 3 days ago

Alternative airports near Watertown

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

Select flight to Watertown Regional ATY. Cheapest and Closest option available. Average driving time to city center is 6 minutes. Flights from $259
ATY
Watertown Regional
CheapestClosest
Average driving time to city center6 min
Flights from $259
Flights from San Antonio (SAT) to Watertown (ATY)
Origin airport
San Antonio Intl.
Destination airport
Watertown Regional
Roundtrip price
$243
Distance
1065 mi

San Antonio to Watertown Flights

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

 

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

Sunday is one of the best days to book for cheap flights from San Antonio 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 Antonio 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 Antonio to Watertown in 2025. You can also book with separate airlines for your outbound and return journeys, from $218 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 Antonio 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 Antonio 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.

 

Frequently asked questions

How much does a flight from San Antonio Intl. Airport (SAT) to Watertown Regional Airport (ATY) cost?
Discover the latest flight deals from SAT to ATY by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SAT to ATY?
The cheapest flights from SAT to ATY are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SAT to ATY?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SAT to ATY. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from San Antonio Intl. Airport (SAT) to Watertown Regional Airport (ATY)?
You'll have to hop on a flight with a layover when traveling from San Antonio Intl. Airport (SAT) to Watertown Regional Airport (ATY). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from SAT to ATY?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change depending on various 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 San Antonio Intl. Airport (SAT) to Watertown Regional Airport (ATY)?
To arrive at Watertown Regional Airport (ATY) without delays, opt for a flight that leaves San Antonio Intl. Airport (SAT) before 3 PM. The chance 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 San Antonio Intl. Airport (SAT) to Watertown Regional Airport (ATY) last-minute?
Waiting until just before your departure to book a ticket from SAT to ATY often results in higher prices. While it's possible to find some last-minute discounts, there's no guarantee. Keep your travel plans flexible to maximize your chances of snagging a bargain.
Is it cheaper to book a SAT to ATY flight and hotel package?
Securing a SAT to ATY flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Select from our extensive range of accommodations and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Antonio Intl. Airport (SAT) to Watertown Regional Airport (ATY)?
Typically, you're able to reschedule or cancel your SAT to ATY flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like more information, visit our Customer Service portal.

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*Available to One Key members.