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 $318 on this airline.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What is the cheapest time of day to fly from RAP to IAD?

When flying from Rapid City to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 Expedia the most. Expedia 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.

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.

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.

$269+ Flights from Rapid City to Washington, D.C. Dulles Intl Airport

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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 December 12, 2025.

Thu 12/112:51 pmRAP - IAD

1 stop7h 11mDelta

Mon 12/156:56 pmIAD - RAP

1 stop5h 50mDelta

Deal found 12/9

$469

Tue 12/238:45 amRAP - IAD

1 stop8h 05mUnited Airlines

Tue 12/306:30 amIAD - RAP

1 stop6h 00mUnited Airlines

Deal found 12/11

$478

Tue 12/165:15 amRAP - IAD

1 stop7h 46mUnited Airlines

Tue 12/236:20 amIAD - RAP

1 stop7h 12mUnited Airlines

Deal found 12/9

$628

Thu 12/258:45 amRAP - IAD

1 stop8h 05mUnited Airlines

Mon 12/296:30 amIAD - RAP

1 stop6h 00mUnited Airlines

Deal found 12/10

$648

Tue 12/238:45 amRAP - IAD

1 stop8h 05mUnited Airlines

Mon 12/296:20 amIAD - RAP

1 stop17h 39mUnited Airlines

Deal found 12/11

$679

Best flights from Rapid City to Dulles Intl
Discover carefully curated flight deals from Rapid City to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

Tue 2/36:00 amRAP - IAD

1 stop8h 31mAmerican Airlines

Tue 2/106:00 amIAD - RAP

1 stop9h 34mAmerican Airlines

Deal found 12/9

$269

Tue 2/312:35 pmRAP - IAD

1 stop6h 32mUnited Airlines

Tue 2/1012:35 pmIAD - RAP

1 stop8h 39mUnited Airlines

Deal found 12/9

$269

Thu 1/226:00 amRAP - IAD

1 stop5h 35mDelta

Wed 1/285:26 pmIAD - RAP

2 stops7h 02mDelta

Deal found 12/10

$294

Sat 1/2410:45 amRAP - IAD

1 stop6h 36mUnited Airlines

Tue 1/2710:02 amIAD - RAP

1 stop7h 20mUnited Airlines

Deal found 12/11

$289

Tue 2/310:54 amRAP - IAD

2 stops10h 12mDelta

Tue 2/1012:40 pmIAD - RAP

2 stops11h 48mDelta

Deal found 12/9

$299

Tue 1/136:00 amRAP - IAD

1 stop8h 31mAmerican Airlines

Thu 1/221:08 pmIAD - RAP

2 stops10h 07mAmerican Airlines

Deal found 12/11

$314

Fri 1/232:40 pmRAP - IAD

1 stop6h 42mUnited Airlines

Sun 1/2512:35 pmIAD - RAP

1 stop8h 39mUnited Airlines

Deal found 12/10

$289

Sat 1/2410:54 amRAP - IAD

1 stop6h 07mDelta

Tue 1/275:26 pmIAD - RAP

2 stops7h 02mDelta

Deal found 12/11

$314

Tue 1/1310:45 amRAP - IAD

1 stop6h 36mUnited Airlines

Sun 1/1812:35 pmIAD - RAP

1 stop6h 37mUnited Airlines

Deal found 12/11

$289

Tue 1/1310:45 amRAP - IAD

1 stop6h 36mUnited Airlines

Thu 1/228:15 amIAD - RAP

1 stop6h 57mUnited Airlines

Deal found 12/11

$289

Fri 1/235:10 amRAP - IAD

1 stop6h 07mUnited Airlines

Mon 1/264:11 pmIAD - RAP

1 stop8h 18mUnited Airlines

Deal found 12/11

$289

Last-minute flights from Rapid City to Dulles Intl
Discover last-minute flight deals from Rapid City to Dulles Intl. Data last updated December 12, 2025 and is based on user searches.

Thu 1/82:40 pmRAP - IAD

1 stop6h 42mUnited Airlines

Thu 1/1512:35 pmIAD - RAP

1 stop6h 37mUnited Airlines

Deal found 12/11

$349

Fri 1/95:10 amRAP - IAD

1 stop6h 07mUnited Airlines

Sun 1/114:11 pmIAD - RAP

1 stop6h 21mUnited Airlines

Deal found 12/11

$310

Fri 1/94:10 pmRAP - IAD

1 stop5h 47mDelta

Mon 1/125:26 pmIAD - RAP

2 stops7h 02mDelta

Deal found 12/11

$314

Tue 1/1310:45 amRAP - IAD

1 stop6h 36mUnited Airlines

Sun 1/1812:35 pmIAD - RAP

1 stop6h 37mUnited Airlines

Deal found 12/11

$289

Thu 1/226:00 amRAP - IAD

1 stop8h 31mAmerican Airlines

Wed 1/286:00 amIAD - RAP

1 stop9h 34mAmerican Airlines

Deal found 12/10

$269

Thu 1/226:00 amRAP - IAD

1 stop5h 35mDelta

Wed 1/285:26 pmIAD - RAP

2 stops7h 02mDelta

Deal found 12/10

$294

Fri 1/234:10 pmRAP - IAD

1 stop5h 47mDelta

Mon 1/265:26 pmIAD - RAP

2 stops7h 02mDelta

Deal found 12/11

$375

Sat 1/2410:54 amRAP - IAD

2 stops11h 30mDelta

Tue 1/275:26 pmIAD - RAP

2 stops7h 02mDelta

Deal found 12/11

$319

Sat 1/312:40 pmRAP - IAD

1 stop6h 42mUnited Airlines

Tue 2/32:24 pmIAD - RAP

1 stop6h 50mUnited Airlines

Deal found 12/10

$369

One-way flights from Rapid City to Dulles Intl
Search for one-way flight options from Rapid City to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated December 12, 2025.

Fri 1/25:30 amRAP - IAD

2 stops8h 29mAmerican Airlines

Deal found 12/10

$705

Fri 1/211:56 amRAP - IAD

2 stops9h 12mDelta

Deal found 12/11

$795

Find flight deals from Rapid City to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	Expedia 3 stars
Round-trip from	$269 (United Airlines)
One-way from	$216 (Delta)
Popular in	February
Cheapest in	November
Average price	$348

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. 28% potential increase in price ($180 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($30 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

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

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Tue 2/3

6:00 am-4:31 pm

1 stop8h 31m

Washington, D.C. Dulles Intl

Tue 2/10

6:00 am-1:34 pm

1 stop9h 34m

$269

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Tue 2/3

12:35 pm-9:07 pm

1 stop6h 32m

Washington, D.C. Dulles Intl

Tue 2/10

12:35 pm-7:14 pm

1 stop8h 39m

$269

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Sat 1/24

10:45 am-7:21 pm

1 stop6h 36m

Washington, D.C. Dulles Intl

Tue 1/27

10:02 am-3:22 pm

1 stop7h 20m

$289

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Fri 1/23

2:40 pm-11:22 pm

1 stop6h 42m

Washington, D.C. Dulles Intl

Sun 1/25

12:35 pm-7:14 pm

1 stop8h 39m

$289

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Tue 1/13

10:45 am-7:21 pm

1 stop6h 36m

Washington, D.C. Dulles Intl

Sun 1/18

12:35 pm-5:12 pm

1 stop6h 37m

$289

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Tue 1/13

10:45 am-7:21 pm

1 stop6h 36m

Washington, D.C. Dulles Intl

Thu 1/22

8:15 am-1:12 pm

1 stop6h 57m

$289

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Fri 1/23

5:10 am-1:17 pm

1 stop6h 07m

Washington, D.C. Dulles Intl

Mon 1/26

4:11 pm-10:29 pm

1 stop8h 18m

$289

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Thu 1/22

6:00 am-1:35 pm

1 stop5h 35m

Washington, D.C. Dulles Intl

Wed 1/28

5:26 pm-10:28 pm

2 stops7h 02m

$294

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Tue 2/3

10:54 am-11:06 pm

2 stops10h 12m

Washington, D.C. Dulles Intl

Tue 2/10

12:40 pm-10:28 pm

2 stops11h 48m

$299

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Tue 1/13

6:00 am-4:31 pm

1 stop8h 31m

Washington, D.C. Dulles Intl

Thu 1/22

1:08 pm-9:15 pm

2 stops10h 07m

$314

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 13 results

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 December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star

*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 Expedia the most. Expedia 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

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

9,095 reviews

Reviews

1 / 20

10.0

Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

United Airlines

7.4

Good

9,095 reviews

United Airlines

7.4

Good

9,095 reviews

Reviews

1 / 20

10.0

Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 5h 35m. The distance from Rapid City to Washington, D.C. Dulles Intl Airport is about 1364 mi. Both multi-stop and nonstop flights can be found to your destination and back.
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 $318 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

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Fredericksburg

Fairfax

Linthicum Heights

Manassas

Rockville

Laurel

Towson

National Harbor

Bowie

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McLean

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Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Rapid City to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$318	Average$530	FlexibilityNo cancel fee	On-time69%

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$269+ Cheap flights from Rapid City (RAP) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Rapid City to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Rapid City to Dulles Intl

Cheapest flights from Rapid City to Dulles IntlExplore 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 December 12, 2025.

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 December 12, 2025.

Find flight deals from Rapid City to Dulles Intl

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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.

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 December.

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.

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.

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?

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

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Rapid City to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Rapid City to Dulles Intl

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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 December 12, 2025.