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

View $216 flight on Tue, Nov 18, 2025Opens in a new window

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

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

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
Wed, Jan 28 - Sat, Jan 31
RAP
Rapid City
IAD
Washington
$269 Roundtrip, found 6 hours ago
$269
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Wed, Jan 28 from Rapid City to Washington, returning Sat, Jan 31, priced at $269 found 6 hours ago
Delta
Tue, Nov 18 - Wed, Dec 3
RAP
Rapid City
IAD
Washington
$269 Roundtrip, found 1 hour ago
$269
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Nov 18 from Rapid City to Washington, returning Wed, Dec 3, priced at $269 found 1 hour ago
Delta
Tue, Dec 16 - Wed, Jan 7
RAP
Rapid City
IAD
Washington
$274 Roundtrip, found 3 days ago
$274
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Dec 16 from Rapid City to Washington, returning Wed, Jan 7, priced at $274 found 3 days ago
United
Tue, Nov 18 - Fri, Nov 28
RAP
Rapid City
IAD
Washington
$284 Roundtrip, found 1 hour ago
$284
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Nov 18 from Rapid City to Washington, returning Fri, Nov 28, priced at $284 found 1 hour ago
United
Tue, Nov 25 - Fri, Nov 28
RAP
Rapid City
IAD
Washington
$291 Roundtrip, found 3 days ago
$291
Roundtrip
found 3 days ago
Select United flight, departing Tue, Nov 25 from Rapid City to Washington, returning Fri, Nov 28, priced at $291 found 3 days ago
United
Wed, Jan 28 - Sat, Jan 31
RAP
Rapid City
IAD
Washington
$294 Roundtrip, found 6 hours ago
$294
Roundtrip
found 6 hours ago
Select United flight, departing Wed, Jan 28 from Rapid City to Washington, returning Sat, Jan 31, priced at $294 found 6 hours ago
Delta
Wed, Oct 29 - Sat, Nov 8
RAP
Rapid City
IAD
Washington
$299 Roundtrip, found 2 days ago
$299
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Oct 29 from Rapid City to Washington, returning Sat, Nov 8, priced at $299 found 2 days ago
United
Tue, Nov 18 - Fri, Nov 28
RAP
Rapid City
IAD
Washington
$303 Roundtrip, found 1 hour ago
$303
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Nov 18 from Rapid City to Washington, returning Fri, Nov 28, priced at $303 found 1 hour ago
United
Wed, Jan 28 - Sat, Jan 31
RAP
Rapid City
IAD
Washington
$313 Roundtrip, found 6 hours ago
$313
Roundtrip
found 6 hours ago
Select United flight, departing Wed, Jan 28 from Rapid City to Washington, returning Sat, Jan 31, priced at $313 found 6 hours ago
Delta
Thu, Oct 30 - Sat, Nov 8
RAP
Rapid City
IAD
Washington
$319 Roundtrip, found 2 days ago
$319
Roundtrip
found 2 days ago
Select Delta flight, departing Thu, Oct 30 from Rapid City to Washington, returning Sat, Nov 8, priced at $319 found 2 days ago

Alternative airports near Washington

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

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $334
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $334

Frequently asked questions

How much does a flight from Rapid City Regional Airport (RAP) to Washington Dulles Intl. Airport (IAD) cost?
Secure a cheap one-way flight from $216 or cheap return flight from $269 from Rapid City Regional Airport (RAP) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Rapid City Regional Airport (RAP) to Washington Dulles Intl. Airport (IAD)?
Planning your trip for January is a good way to save, as it's the cheapest month for flights between RAP and IAD. You'll usually find the lowest fares during the off-season.
What is the cheapest airline that flies from Rapid City Regional Airport (RAP) to Washington Dulles Intl. Airport (IAD)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest RAP to IAD flight.
How many flights per day from Rapid City Regional Airport (RAP) to Washington Dulles Intl. Airport (IAD)?
Direct flights from Rapid City Regional Airport (RAP) to Washington Dulles Intl. Airport (IAD) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from RAP to IAD?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change 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 Rapid City Regional Airport (RAP) to Washington Dulles Intl. Airport (IAD)?
To avoid potential delays on the Rapid City Regional Airport (RAP) to Washington Dulles Intl. Airport (IAD) route, fly before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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 Washington Dulles Intl. Airport (IAD) last-minute?
Last-minute fares from RAP to IAD are generally more expensive. For the best prices, start searching for flights early. That said, if your travel plans are flexible, it's possible to score a cheap ticket right before your journey.
Is it cheaper to book a RAP to IAD flight and hotel package?
Booking a RAP to IAD flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Select from our impressive range of hotels and then add activities, flights and car rentals to your booking. Bundle it all 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 Washington Dulles Intl. Airport (IAD)?
Typically, it's possible to cancel or reschedule your RAP to IAD flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible 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
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$268
Distance
1364 mi
Average flight time
6 hours 8 mins

Book with confidence

Rapid City to Washington Flights

The cheapest times to fly from Rapid City to Washington

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

 

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

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

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 Washington 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 Rapid City to Washington 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 Washington 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 Washington Flights

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*Available to One Key members.