$239 Cheap Flights from Rapid City (RAP) to Watertown (ATY)

View $239 flight on Sun, Feb 15, 2026Opens in a new window

Popular airlines from Rapid City Regional Airport (RAP) to Watertown, SD (ATY-Watertown Regional)

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Cheap Flights from Rapid City to Watertown (RAP-ATY)

Prices were available within the past 7 days and start at $239 for one-way flights and $312 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Nov 18 - Tue, Nov 25
RAP
Rapid City
ATY
Watertown
$312 Roundtrip, found 5 days ago
$312
Roundtrip
found 5 days ago
Select Delta flight, departing Tue, Nov 18 from Rapid City to Watertown, returning Tue, Nov 25, priced at $312 found 5 days ago
Delta
Mon, Nov 24 - Thu, Nov 27
RAP
Rapid City
ATY
Watertown
$322 Roundtrip, found 5 days ago
$322
Roundtrip
found 5 days ago
Select Delta flight, departing Mon, Nov 24 from Rapid City to Watertown, returning Thu, Nov 27, priced at $322 found 5 days ago
Delta
Fri, Nov 21 - Sun, Nov 23
RAP
Rapid City
ATY
Watertown
$332 Roundtrip, found 5 days ago
$332
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Nov 21 from Rapid City to Watertown, returning Sun, Nov 23, priced at $332 found 5 days ago
Delta
Sun, Nov 9 - Sat, Nov 15
RAP
Rapid City
ATY
Watertown
$372 Roundtrip, found 4 days ago
$372
Roundtrip
found 4 days ago
Select Delta flight, departing Sun, Nov 9 from Rapid City to Watertown, returning Sat, Nov 15, priced at $372 found 4 days ago
Delta
Fri, Nov 21 - Sun, Nov 23
RAP
Rapid City
ATY
Watertown
$392 Roundtrip, found 5 days ago
$392
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Nov 21 from Rapid City to Watertown, returning Sun, Nov 23, priced at $392 found 5 days ago
Delta
Thu, Nov 6 - Sun, Nov 16
RAP
Rapid City
ATY
Watertown
$402 Roundtrip, found 4 days ago
$402
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Nov 6 from Rapid City to Watertown, returning Sun, Nov 16, priced at $402 found 4 days ago
Delta
Thu, Nov 6 - Thu, Nov 13
RAP
Rapid City
ATY
Watertown
$422 Roundtrip, found 4 days ago
$422
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Nov 6 from Rapid City to Watertown, returning Thu, Nov 13, priced at $422 found 4 days ago
Delta
Sun, Nov 9 - Sun, Nov 16
RAP
Rapid City
ATY
Watertown
$432 Roundtrip, found 3 days ago
$432
Roundtrip
found 3 days ago
Select Delta flight, departing Sun, Nov 9 from Rapid City to Watertown, returning Sun, Nov 16, priced at $432 found 3 days ago
Delta
Fri, Nov 21 - Sun, Nov 23
RAP
Rapid City
ATY
Watertown
$452 Roundtrip, found 5 days ago
$452
Roundtrip
found 5 days ago
Select Delta flight, departing Fri, Nov 21 from Rapid City to Watertown, returning Sun, Nov 23, priced at $452 found 5 days ago
United
Fri, Nov 21 - Sun, Nov 23
RAP
Rapid City
ATY
Watertown
$682 Roundtrip, found 5 days ago
$682
Roundtrip
found 5 days ago
Select United flight, departing Fri, Nov 21 from Rapid City to Watertown, returning Sun, Nov 23, priced at $682 found 5 days ago

Frequently asked questions

How much does a flight from Rapid City Regional Airport (RAP) to Watertown Regional Airport (ATY) cost?
Grab a cheap one-way flight from $239 or cheap return flight from $312 from Rapid City Regional Airport (RAP) to Watertown Regional Airport (ATY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Rapid City Regional Airport (RAP) to Watertown Regional Airport (ATY)?
The cheapest month to fly from RAP to ATY is November, when there's less demand. Off-peak season is usually when better flight deals are available between these airports.
What is the cheapest airline that flies from Rapid City Regional Airport (RAP) to Watertown Regional Airport (ATY)?
To find the cheapest airline that'll fly you from RAP to ATY, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Rapid City Regional Airport (RAP) to Watertown Regional Airport (ATY)?
You'll need to hop on a flight with a layover if you're traveling from Rapid City Regional Airport (RAP) to Watertown Regional Airport (ATY). There are no daily direct flights on this route. However, simply 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 RAP to ATY?
Typically you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* But this can vary based on the season, airline 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 Rapid City Regional Airport (RAP) to Watertown Regional Airport (ATY)?
To avoid possible delays on the Rapid City Regional Airport (RAP) to Watertown Regional Airport (ATY) route, aim to travel before 3 PM. Later departures have a 22% higher chance of being 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 Rapid City Regional Airport (RAP) to Watertown Regional Airport (ATY) last-minute?
Waiting until just before your trip to book your flight from RAP to ATY generally means paying more. While you may find some last-minute deals, they're not always guaranteed. Be flexible with your itinerary for a better chance of scoring a bargain.
Is it cheaper to book a RAP to ATY flight and hotel package?
Opting for a RAP to ATY flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Select from our impressive range of stays and then add flights, car rentals 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 Rapid City Regional Airport (RAP) to Watertown Regional Airport (ATY)?
Typically, it's possible to cancel or reschedule your RAP to ATY flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Rapid City Regional
Destination airport
Watertown Regional
Roundtrip price
$311
Distance
296 mi

Book with confidence

Rapid City to Watertown Flights

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

 

The best time to book a flight from Rapid City to Watertown

Sunday is one of the best days to book for cheap flights from Rapid City 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 Rapid City 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 Rapid City to Watertown in 2025. You can also book with separate airlines for your outbound and return journeys, from $239 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 Rapid City 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 Rapid City 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.

 

Rapid City to Watertown Flights

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*Available to One Key members.