$272 Cheap Flights from Seattle (SEA) to Watertown (ATY)

View $272 flight on Wed, Nov 5, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Watertown, SD (ATY-Watertown Regional)

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Cheap Flights from Seattle to Watertown (SEA-ATY)

Prices were available within the past 7 days and start at $272 for one-way flights and $254 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Dec 4 - Sat, Dec 6
SEA
Seattle
ATY
Watertown
$254 Roundtrip, found 2 days ago
$254
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Dec 4 from Seattle to Watertown, returning Sat, Dec 6, priced at $254 found 2 days ago
Delta
Wed, Dec 3 - Sat, Dec 6
SEA
Seattle
ATY
Watertown
$264 Roundtrip, found 2 days ago
$264
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Dec 3 from Seattle to Watertown, returning Sat, Dec 6, priced at $264 found 2 days ago
Delta
Wed, Dec 3 - Tue, Dec 16
SEA
Seattle
ATY
Watertown
$269 Roundtrip, found 6 days ago
$269
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, Dec 3 from Seattle to Watertown, returning Tue, Dec 16, priced at $269 found 6 days ago
Delta
Thu, Nov 6 - Tue, Nov 18
SEA
Seattle
ATY
Watertown
$288 Roundtrip, found 6 days ago
$288
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Nov 6 from Seattle to Watertown, returning Tue, Nov 18, priced at $288 found 6 days ago
Delta
Tue, Nov 4 - Wed, Nov 12
SEA
Seattle
ATY
Watertown
$289 Roundtrip, found 6 days ago
$289
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Nov 4 from Seattle to Watertown, returning Wed, Nov 12, priced at $289 found 6 days ago
Delta
Tue, Nov 4 - Sun, Nov 16
SEA
Seattle
ATY
Watertown
$293 Roundtrip, found 6 days ago
$293
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Nov 4 from Seattle to Watertown, returning Sun, Nov 16, priced at $293 found 6 days ago
Delta
Thu, Jan 8 - Tue, Jan 13
SEA
Seattle
ATY
Watertown
$307 Roundtrip, found 6 days ago
$307
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Jan 8 from Seattle to Watertown, returning Tue, Jan 13, priced at $307 found 6 days ago
Delta
Wed, Jan 7 - Tue, Jan 13
SEA
Seattle
ATY
Watertown
$312 Roundtrip, found 6 days ago
$312
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, Jan 7 from Seattle to Watertown, returning Tue, Jan 13, priced at $312 found 6 days ago
Delta
Thu, Dec 25 - Tue, Jan 6
SEA
Seattle
ATY
Watertown
$317 Roundtrip, found 6 days ago
$317
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Dec 25 from Seattle to Watertown, returning Tue, Jan 6, priced at $317 found 6 days ago
United
Sat, Nov 1 - Mon, Nov 17
SEA
Seattle
ATY
Watertown
$334 Roundtrip, found 6 days ago
$334
Roundtrip
found 6 days ago
Select United flight, departing Sat, Nov 1 from Seattle to Watertown, returning Mon, Nov 17, priced at $334 found 6 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 $264
ATY
Watertown Regional
CheapestClosest
Average driving time to city center6 min
Flights from $264

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Watertown Regional Airport (ATY) cost?
Grab a cheap one-way flight from $272 or cheap return flight from $254 from Seattle - Tacoma Intl. Airport (SEA) to Watertown Regional Airport (ATY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Watertown Regional Airport (ATY)?
Traveling in December is a great way to save, as it's the cheapest month for flights between SEA and ATY. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Watertown Regional Airport (ATY)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest SEA to ATY flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Watertown Regional Airport (ATY)?
You'll need to hop on a flight with a layover if you're traveling from Seattle - Tacoma Intl. Airport (SEA) to Watertown Regional Airport (ATY). There are no daily direct flights on this route. However, just filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from SEA to ATY?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Watertown Regional Airport (ATY)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Watertown Regional Airport (ATY) route, aim to travel before 3 PM. Departures after this time are 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.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Watertown Regional Airport (ATY) last-minute?
Booking your plane ticket from SEA to ATY just before your getaway is usually more expensive. But if there's some wiggle room with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a SEA to ATY flight and hotel package?
You'll typically save money by booking a SEA to ATY flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. Once you've selected your preferred flights and accommodations, you can add extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Watertown Regional Airport (ATY)?
If you booked your SEA to ATY flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Watertown Regional
Roundtrip price
$253
Distance
1209 mi

Book with confidence

Seattle to Watertown Flights

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

 

The best time to book a flight from Seattle to Watertown

Sunday is one of the best days to book for cheap flights from Seattle 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 Seattle 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 Seattle to Watertown in 2025. You can also book with separate airlines for your outbound and return journeys, from $272 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 Seattle 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 Seattle 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.

 

Seattle to Watertown Flights

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*Available to One Key members.