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Dulles Intl

$261+ Cheap flights from Rapid City (RAP) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — IAD
Mar 19 — Mar 261
Thu 3/19
Thu 3/26
1 adult, Economy
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Cheap flight deals from Rapid City to Dulles Intl

Cheapest flights from Rapid City to Dulles Intl
Explore the most affordable flight options available from Rapid City to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 17, 2026.

This United Airlines deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:40 am
RAP
-
IAD
1 stop7h 24m
United Airlines
Mon 4/66:15 am
IAD
-
RAP
1 stop6h 20m
United Airlines
Deal found 2/16$302
This United Airlines deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/24:41 pm
RAP
-
IAD
1 stop5h 56m
United Airlines
Mon 7/65:41 pm
IAD
-
RAP
1 stop6h 43m
United Airlines
Deal found 2/15$313
This United Airlines deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/35:20 am
RAP
-
IAD
1 stop5h 45m
United Airlines
Sat 3/75:15 pm
IAD
-
RAP
1 stop6h 42m
United Airlines
Deal found 2/16$339
This United Airlines deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/99:00 am
RAP
-
IAD
1 stop7h 02m
United Airlines
Mon 7/136:15 am
IAD
-
RAP
1 stop6h 04m
United Airlines
Deal found 2/15$347
This American Airlines deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:36 pm
RAP
-
IAD
1 stop7h 52m
American Airlines
Thu 9/176:58 am
IAD
-
RAP
1 stop5h 51m
American Airlines
Deal found 2/14$349
This American Airlines deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/151:08 pm
RAP
-
IAD
1 stop8h 18m
American Airlines
Sun 4/198:11 pm
IAD
-
RAP
2 stops17h 12m
American Airlines
Deal found 2/15$413
This Delta deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/34:29 pm
RAP
-
IAD
1 stop5h 26m
Delta
Sat 3/75:13 pm
IAD
-
RAP
2 stops7h 14m
Delta
Deal found 2/16$424
This United Airlines deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/92:45 pm
RAP
-
IAD
1 stop6h 35m
United Airlines
Sat 3/145:10 pm
IAD
-
RAP
1 stop6h 47m
United Airlines
Deal found 2/15$425
This United Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:00 am
RAP
-
IAD
1 stop6h 05m
United Airlines
Mon 3/164:00 pm
IAD
-
RAP
1 stop6h 34m
United Airlines
Deal found 2/13$428
This American Airlines deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/42:21 pm
RAP
-
IAD
1 stop6h 32m
American Airlines
Sun 3/86:00 am
IAD
-
RAP
1 stop9h 51m
American Airlines
Deal found 2/16$434
This American Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:10 pm
RAP
-
IAD
2 stops16h 38m
American Airlines
Mon 8/316:27 am
IAD
-
RAP
1 stop7h 19m
American Airlines
Deal found 2/13$443

Find flight deals from Rapid City to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Rapid City (RAP) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$302
(United Airlines)

One-way from

$261
(Kiwi.com)

Popular in

March

Cheapest in

November

Average price

$555
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
One-way flight from Rapid City to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 30% potential increase in price ($193 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Rapid City to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 17, 2026.
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

Rapid City

Fly to

Dulles Intl

Route

Depart

Return

Price

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Thu 7/2

4:41 pm-12:37 am

1 stop5h 56m

Washington, D.C. Dulles Intl

Mon 7/6

5:41 pm-10:24 pm

1 stop6h 43m

$313

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Tue 3/3

5:20 am-1:05 pm

1 stop5h 45m

Washington, D.C. Dulles Intl

Sat 3/7

5:15 pm-9:57 pm

1 stop6h 42m

$339

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Thu 7/9

9:00 am-6:02 pm

1 stop7h 02m

Washington, D.C. Dulles Intl

Mon 7/13

6:15 am-10:19 am

1 stop6h 04m

$347

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Mon 3/9

2:45 pm-11:20 pm

1 stop6h 35m

Washington, D.C. Dulles Intl

Sat 3/14

5:10 pm-9:57 pm

1 stop6h 47m

$425

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Sat 3/7

5:00 am-1:05 pm

1 stop6h 05m

Washington, D.C. Dulles Intl

Mon 3/16

4:00 pm-8:34 pm

1 stop6h 34m

$428

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Tue 3/3

10:54 am-11:09 pm

2 stops10h 15m

Washington, D.C. Dulles Intl

Sat 3/7

5:13 pm-10:27 pm

2 stops7h 14m

$429

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Wed 3/4

2:21 pm-10:53 pm

1 stop6h 32m

Washington, D.C. Dulles Intl

Sun 3/8

6:00 am-1:51 pm

1 stop9h 51m

$434

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Fri 8/14

6:10 pm-12:48 pm

2 stops16h 38m

Washington, D.C. Dulles Intl

Mon 8/31

6:27 am-11:46 am

1 stop7h 19m

$443

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Wed 4/15

3:55 pm-11:32 pm

1 stop5h 37m

Washington, D.C. Dulles Intl

Sun 4/19

6:37 pm-10:20 pm

1 stop5h 43m

$474

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Wed 4/15

1:08 pm-11:59 pm

2 stops8h 51m

Washington, D.C. Dulles Intl

Sun 4/19

8:11 pm-11:23 am

2 stops17h 12m

$478

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/13

Showing 1-10 of 15 results
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Compare providers for flights from Rapid City to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
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 February.
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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated February 17, 2026.
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
7.4
Good
9,308 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

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
7.4
Good
9,308 reviews
United Airlines
7.4
Good
9,308 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

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

Find useful and relevant information for your journey from Rapid City to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 5h 56m. 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 $348 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
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Fredericksburg
Hanover
Laurel
Linthicum Heights
Rockville
Upper Marlboro
Manassas
Bowie
Largo
McLean
Clinton
Towson

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Rapid City to Dulles Intl

Discover the top airline that operate flights from Rapid City to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$348Average$487FlexibilityNo cancel feeOn-time69%

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