$216 Cheap Flights from Washington (IAD) to Rapid City (RAP)

View $216 flight on Tue, Nov 25, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Rapid City Regional Airport (RAP)

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Cheap Flights from Washington to Rapid City (IAD-RAP)

Prices were available within the past 7 days and start at $216 for one-way flights and $269 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Fri, Dec 5 - Tue, Dec 9
IAD
Washington
RAP
Rapid City
$269 Roundtrip, found 17 hours ago
$269
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Fri, Dec 5 from Washington to Rapid City, returning Tue, Dec 9, priced at $269 found 17 hours ago
Delta
Fri, Dec 5 - Tue, Dec 9
IAD
Washington
RAP
Rapid City
$269 Roundtrip, found 17 hours ago
$269
Roundtrip
found 17 hours ago
Select Delta flight, departing Fri, Dec 5 from Washington to Rapid City, returning Tue, Dec 9, priced at $269 found 17 hours ago
United
Wed, Feb 18 - Wed, Mar 4
IAD
Washington
RAP
Rapid City
$269 Roundtrip, found 19 hours ago
$269
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Feb 18 from Washington to Rapid City, returning Wed, Mar 4, priced at $269 found 19 hours ago
Delta
Sat, Feb 21 - Sat, Feb 28
IAD
Washington
RAP
Rapid City
$274 Roundtrip, found 14 hours ago
$274
Roundtrip
found 14 hours ago
Select Delta flight, departing Sat, Feb 21 from Washington to Rapid City, returning Sat, Feb 28, priced at $274 found 14 hours ago
Delta
Tue, Jan 13 - Sat, Jan 17
IAD
Washington
RAP
Rapid City
$279 Roundtrip, found 1 day ago
$279
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Jan 13 from Washington to Rapid City, returning Sat, Jan 17, priced at $279 found 1 day ago
United
Wed, Feb 18 - Wed, Mar 4
IAD
Washington
RAP
Rapid City
$289 Roundtrip, found 19 hours ago
$289
Roundtrip
found 19 hours ago
Select United flight, departing Wed, Feb 18 from Washington to Rapid City, returning Wed, Mar 4, priced at $289 found 19 hours ago
Delta
Fri, Dec 5 - Tue, Dec 9
IAD
Washington
RAP
Rapid City
$304 Roundtrip, found 17 hours ago
$304
Roundtrip
found 17 hours ago
Select Delta flight, departing Fri, Dec 5 from Washington to Rapid City, returning Tue, Dec 9, priced at $304 found 17 hours ago
Delta
Sat, Feb 21 - Sat, Feb 28
IAD
Washington
RAP
Rapid City
$309 Roundtrip, found 14 hours ago
$309
Roundtrip
found 14 hours ago
Select Delta flight, departing Sat, Feb 21 from Washington to Rapid City, returning Sat, Feb 28, priced at $309 found 14 hours ago
Delta
Sun, Jan 18 - Mon, Feb 2
IAD
Washington
RAP
Rapid City
$314 Roundtrip, found 1 day ago
$314
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Jan 18 from Washington to Rapid City, returning Mon, Feb 2, priced at $314 found 1 day ago
United
Wed, Nov 12 - Wed, Nov 19
IAD
Washington
RAP
Rapid City
$319 Roundtrip, found 6 days ago
$319
Roundtrip
found 6 days ago
Select United flight, departing Wed, Nov 12 from Washington to Rapid City, returning Wed, Nov 19, priced at $319 found 6 days ago

Find the cheapest month to fly from Washington (IAD) to Rapid City (RAP)

September is typically the cheapest month to fly

From $268 - $498 per traveler.

Alternative airports near Rapid City

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

Select flight to Rapid City Regional RAP. Cheapest and Closest option available. Average driving time to city center is 16 minutes. Flights from $304
RAP
Rapid City Regional
CheapestClosest
Average driving time to city center16 min
Flights from $304

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Rapid City Regional Airport (RAP) cost?
Lock in a cheap one-way flight from $216 or cheap return flight from $269 from Washington Dulles Intl. Airport (IAD) to Rapid City Regional Airport (RAP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Rapid City Regional Airport (RAP)?
Traveling in December is a great way to save, as it's the cheapest month for flights between IAD and RAP. You'll usually find the lowest fares during off-peak months.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Rapid City Regional Airport (RAP)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest IAD to RAP flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Rapid City Regional Airport (RAP)?
There are no daily direct flights available from Washington Dulles Intl. Airport (IAD) to Rapid City Regional Airport (RAP). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from IAD to RAP?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change based on various 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 Rapid City Regional Airport (RAP)?
Select a flight from Washington Dulles Intl. Airport (IAD) to Rapid City Regional Airport (RAP) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time 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 Rapid City Regional Airport (RAP) last-minute?
Last-minute bookings from IAD to RAP are generally more expensive. To lock in the lowest rates, start looking for flights ahead of time. That being said, if your travel plans are flexible, you may land a cheap ticket right before your journey.
Is it cheaper to book an IAD to RAP flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAD to RAP flight and hotel package with Expedia could result in significant savings. What's more, having it all in one place takes the hassle out of planning your trip. Simply pick your flights and select from our wide range of stays, then tailor your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Rapid City Regional Airport (RAP)?
In most instances, you're able to reschedule or cancel your IAD to RAP flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you want more details, head to our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Rapid City Regional
Airlines serving
American Airlines, Delta, United
Roundtrip price
$268
Distance
1364 mi

Book with confidence

Washington to Rapid City Flights

The cheapest times to fly from Washington to Rapid City

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

 

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

Sunday is one of the best days to book for cheap flights from Washington to Rapid City: 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 Rapid City

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 Rapid City in 2025. You can also book with separate airlines for your outbound and return journeys, from $216 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 Rapid City 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 Rapid City 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 Rapid City Flights

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*Available to One Key members.