HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$321+ Cheap flights from Rapid City (RAP) to Dulles Intl (IAD)

RAP — IAD
Nov 21 — Nov 281
Sat 11/21
Sat 11/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Rapid City to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Rapid City to Dulles Intl

Cheapest flights from Rapid City to Dulles Intl

Wed 12/304:37 pm -
1 stop4h 56m
Wed 1/67:30 am -
1 stop5h 42m
Deal found 10/16$321
Thu 11/266:50 am -
1 stop4h 59m
Tue 12/17:26 am -
1 stop8h 34m
Deal found 10/21$340
Wed 12/304:37 pm -
1 stop4h 56m
Fri 1/85:00 pm -
2 stops7h 39m
Deal found 10/16$345
Tue 11/105:00 am -
1 stop5h 55m
Sun 11/156:10 am -
1 stop6h 21m
Deal found 10/18$359
Fri 11/204:36 pm -
1 stop4h 45m
Sun 11/226:00 am -
2 stops9h 43m
Deal found 10/18$364
Sat 10/3111:12 am -
1 stop6h 18m
Sat 11/74:10 pm -
1 stop6h 33m
Deal found 10/17$385
Sat 11/711:29 am -
2 stops11h 13m
Fri 11/137:25 am -
1 stop8h 18m
Deal found 10/19$390
Wed 12/304:37 pm -
1 stop4h 56m
Sun 1/37:15 am -
1 stop6h 04m
Deal found 10/16$400
Sat 10/244:38 pm -
1 stop4h 48m
Sat 10/317:23 am -
1 stop5h 22m
Deal found 10/17$411

Find flight deals from Rapid City to Dulles Intl

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$321
(Delta)

Popular in

May

Cheapest in

December

Average price

$571
Provider with most accurate pricing for Rapid City-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Rapid City-Washington, D.C. Dulles Intl flights.
Search Deals
From Rapid City to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Rapid City to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Rapid CityWashington, D.C.

RAP Rapid City - IAD Washington, D.C. Dulles Intl

RAPIAD

Rapid City

Tue 4/6

11:30 am-12:20 am

2 stops10h 50m

Washington, D.C. Dulles Intl

Tue 4/13

7:30 am-11:12 am

1 stop5h 42m

$326
Quickest round-trip

Rapid CityWashington, D.C.

RAP Rapid City - IAD Washington, D.C. Dulles Intl

RAPIAD

Rapid City

Thu 12/24

9:47 am-7:31 pm

1 stop7h 44m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-10:00 pm

Nonstop0h 00m

$339

Rapid CityWashington, D.C.

RAP Rapid City - IAD Washington, D.C. Dulles Intl

RAPIAD

Rapid City

Mon 4/5

11:30 am-11:02 pm

2 stops9h 32m

Washington, D.C. Dulles Intl

Tue 4/13

7:30 am-11:12 am

1 stop5h 42m

$345

Rapid CityWashington, D.C.

RAP Rapid City - IAD Washington, D.C. Dulles Intl

RAPIAD

Rapid City

Mon 11/2

11:12 am-9:30 pm

1 stop8h 18m

Washington, D.C. Dulles Intl

Mon 11/9

6:12 am-10:31 am

1 stop6h 19m

$458

Rapid CityWashington, D.C.

RAP Rapid City - IAD Washington, D.C. Dulles Intl

RAPIAD

Rapid City

Mon 12/28

6:35 am-11:33 pm

1 stop14h 58m

Washington, D.C. Dulles Intl

Wed 1/6

5:00 pm-10:39 pm

2 stops7h 39m

$529

Rapid CityWashington, D.C.

RAP Rapid City - IAD Washington, D.C. Dulles Intl

RAPIAD

Rapid City

Tue 11/10

5:00 am-12:55 pm

1 stop5h 55m

Washington, D.C. Dulles Intl

Tue 11/10

4:10 pm-8:43 pm

1 stop6h 33m

$753

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

Sorted by cheapest first

Compare providers for flights from Rapid City to Dulles Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Rapid City to Dulles Intl in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Rapid City-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Rapid City-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Rapid City-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Rapid City-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Rapid City-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Rapid City to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Rapid City with our price prediction graph.
Estimated round-trip price

Reviews of airlines servicing Dulles Intl

Read reviews from past customers who have flown United Airlines from Rapid City to Washington, D.C. Dulles Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.3
Good
10,392 reviews

Entertainment

7.1

Overall

7.3

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.3
Good
10,392 reviews
United Airlines
7.3
Good
10,392 reviews

Entertainment

7.1

Overall

7.3

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

  • What airport do you fly from for flights from Rapid City to Washington, D.C. Dulles Intl?

    For a flight from Rapid City to Washington, D.C. Dulles Intl, you will be flying from Rapid City. Rapid City (RAP) is just 9.0 mi from the center of the city. Rapid City is the only Rapid City airport and it handles 0 outbound flights to Washington, D.C. Dulles Intl per day. 1 airline has flights to Washington, D.C. Dulles Intl from Rapid City on a regular basis.

  • How long is the flight from Rapid City to Washington, D.C. Dulles Intl Airport?

    Departing from Rapid City to Washington, D.C. Dulles Intl Airport will take you 10h 50m. The distance from Rapid City to Washington, D.C. Dulles Intl Airport is about 1364 mi.

  • What is the cheapest airline to fly from Rapid City to Washington, D.C. Dulles Intl Airport round-trip?

    Our cheapest airline available from Rapid City to Washington, D.C. Dulles Intl Airport is United Airlines. Our recent data shows that you can find tickets from as low as $288 on this airline.

  • Can I find deals for flights from Rapid City to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Rapid City to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Rapid City to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Rapid City to Dulles Intl.

  • Can I find deals for business class flights from Rapid City to Dulles Intl?

    Yes. Cheapflights offers flight deals from Rapid City to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Chantilly
Woodbridge
Arlington
Owings Mills
Lanham
Sterling
Reston
Herndon
Hyattsville
Rockville
Springfield
Fredericksburg
Falls Church
Tysons
Towson
Oxon Hill
Laurel
Clinton
Hunt Valley

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Rapid City to Dulles Intl

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$288Average$353FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.