$271 Cheap Flights from Washington (IAD) to Watertown (ATY)

View $271 flight on Thu, Nov 20, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Watertown, SD (ATY-Watertown Regional)

Cheap Flights from Washington to Watertown (IAD-ATY)

Prices were available within the past 7 days and start at $271 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, Nov 20 - Sun, Nov 23
IAD
Washington
ATY
Watertown
$254 Roundtrip, found 6 days ago
$254
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Nov 20 from Washington to Watertown, returning Sun, Nov 23, priced at $254 found 6 days ago
Delta
Sat, Nov 15 - Thu, Nov 20
IAD
Washington
ATY
Watertown
$269 Roundtrip, found 2 days ago
$269
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Nov 15 from Washington to Watertown, returning Thu, Nov 20, priced at $269 found 2 days ago
Delta
Sat, Nov 15 - Tue, Nov 18
IAD
Washington
ATY
Watertown
$294 Roundtrip, found 2 days ago
$294
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Nov 15 from Washington to Watertown, returning Tue, Nov 18, priced at $294 found 2 days ago
Delta
Fri, Nov 14 - Thu, Nov 20
IAD
Washington
ATY
Watertown
$314 Roundtrip, found 2 days ago
$314
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, Nov 14 from Washington to Watertown, returning Thu, Nov 20, priced at $314 found 2 days ago
Delta
Wed, Nov 12 - Thu, Nov 20
IAD
Washington
ATY
Watertown
$324 Roundtrip, found 2 days ago
$324
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Nov 12 from Washington to Watertown, returning Thu, Nov 20, priced at $324 found 2 days ago
Delta
Sat, Nov 15 - Fri, Nov 21
IAD
Washington
ATY
Watertown
$329 Roundtrip, found 2 days ago
$329
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Nov 15 from Washington to Watertown, returning Fri, Nov 21, priced at $329 found 2 days ago
Delta
Thu, Nov 20 - Sun, Nov 23
IAD
Washington
ATY
Watertown
$334 Roundtrip, found 6 days ago
$334
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Nov 20 from Washington to Watertown, returning Sun, Nov 23, priced at $334 found 6 days ago
Delta
Fri, Nov 14 - Sun, Nov 16
IAD
Washington
ATY
Watertown
$339 Roundtrip, found 2 days ago
$339
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, Nov 14 from Washington to Watertown, returning Sun, Nov 16, priced at $339 found 2 days ago
Delta
Wed, Nov 12 - Sun, Nov 16
IAD
Washington
ATY
Watertown
$349 Roundtrip, found 2 days ago
$349
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Nov 12 from Washington to Watertown, returning Sun, Nov 16, priced at $349 found 2 days ago
United
Sat, Dec 13 - Tue, Dec 16
IAD
Washington
ATY
Watertown
$599 Roundtrip, found 1 day ago
$599
Roundtrip
found 1 day ago
Select United flight, departing Sat, Dec 13 from Washington to Watertown, returning Tue, Dec 16, priced at $599 found 1 day 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 $663
ATY
Watertown Regional
CheapestClosest
Average driving time to city center6 min
Flights from $663

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Watertown Regional Airport (ATY) cost?
Lock in a cheap one-way flight from $271 or cheap return flight from $254 from Washington Dulles Intl. Airport (IAD) 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 Washington Dulles Intl. Airport (IAD) to Watertown Regional Airport (ATY)?
November is the least expensive month to fly from IAD to ATY. Traveling during quieter months is often the key to landing a great deal.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Watertown Regional Airport (ATY)?
To find the cheapest airline flying from IAD to ATY, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and seat 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 Washington Dulles Intl. Airport (IAD) to Watertown Regional Airport (ATY)?
There are no daily direct flights from Washington Dulles Intl. Airport (IAD) to Watertown Regional Airport (ATY). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be on your way in no time.
What day of the week has the most flights from IAD to ATY?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary based on a number of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Watertown Regional Airport (ATY)?
Book a flight from Washington Dulles Intl. Airport (IAD) to Watertown Regional Airport (ATY) that leaves before 3 PM to reduce the risk of delays and cancellations. Later departures 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.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Watertown Regional Airport (ATY) last-minute?
Last-minute fares from IAD to ATY are typically more expensive. To lock in the cheapest rates, start searching for flights early. That said, if your travel plans are flexible, it's possible to score a cheap fare just before your departure.
Is it cheaper to book an IAD to ATY flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAD to ATY flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place takes the hassle out of planning your trip. Just secure your flights and choose from our extensive range of hotels, then customize your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Watertown Regional Airport (ATY)?
Generally, it's possible to cancel or reschedule your IAD to ATY flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Watertown Regional
Roundtrip price
$253
Distance
1090 mi

Book with confidence

Washington to Watertown Flights

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

 

The best time to book a flight from Washington to Watertown

Sunday is one of the best days to book for cheap flights from Washington 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 Washington 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 Washington to Watertown in 2025. You can also book with separate airlines for your outbound and return journeys, from $271 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 Washington 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 Washington 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.

 

Washington to Watertown Flights

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*Available to One Key members.