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. Users have found that United Airlines is 40% cheaper than the other options available to this destination.

What is the cheapest month to book a flight from Rapid City to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Rapid City to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Rapid City to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from Rapid City to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Rapid City to Washington, D.C. Dulles Intl Airport flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 day to fly round-trip from Rapid City to Washington, D.C. Dulles Intl Airport?

Flights from Rapid City to Washington, D.C. Dulles Intl Airport are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C. Dulles Intl Airport.

What is the cheapest month to fly from Rapid City to Washington, D.C. Dulles Intl Airport?

Our data shows that December tends to be the cheapest month to fly to Washington, D.C. Dulles Intl Airport from Rapid City. Users have commonly found prices around $512 for the month, but tickets can be as low as $269. Due to multiple factors, prepare for potentially higher prices in February.

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

It’s typically best to fly out from Rapid City to Washington, D.C. Dulles Intl Airport at noon. Doing so could potentially save you 21% on the flight price compared to flying in the morning, which is usually more expensive.

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.

$246+ Flights from Rapid City to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Rapid City to Dulles Intl

Round-trip from	$269 (United Airlines)
One-way from	$246 (United Airlines)
Popular in	September
Cheapest in	January
Average price	$923

From Rapid City to Washington, D.C. Dulles Intl

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One-way flight from Rapid City to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 6% potential increase in price ($41 potential increase over avg. RT price).

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Cheapest flight prices on average. 6% potential price decrease ($38 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find 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 September 11, 2025.

Sat 10/47:00 amRAP - IAD

1 stop7h 58mUnited Airlines

Sun 10/56:30 amIAD - RAP

1 stop5h 43mUnited Airlines

Deal found 9/11

$269

Sat 10/45:30 amRAP - IAD

1 stop5h 56mUnited Airlines

Sat 10/45:17 pmIAD - RAP

2 stops18h 56mUnited Airlines

Deal found 9/11

$344

Tue 10/78:30 amRAP - IAD

1 stop6h 13mUnited Airlines

Tue 10/146:30 amIAD - RAP

1 stop5h 43mUnited Airlines

Deal found 9/11

$349

Tue 10/78:30 amRAP - IAD

1 stop6h 13mUnited Airlines

Sat 10/112:45 pmIAD - RAP

1 stop5h 55mUnited Airlines

Deal found 9/11

$374

Mon 10/65:50 pmRAP - IAD

1 stop9h 32mUnited Airlines

Tue 10/146:30 amIAD - RAP

1 stop5h 43mUnited Airlines

Deal found 9/11

$424

Thu 10/912:56 pmRAP - IAD

1 stop8h 26mUnited Airlines

Sat 10/112:45 pmIAD - RAP

1 stop5h 55mUnited Airlines

Deal found 9/11

$427

Mon 10/64:34 pmRAP - IAD

1 stop5h 06mDelta

Tue 10/76:18 amIAD - RAP

1 stop5h 35mDelta

Deal found 9/9

$445

Mon 10/612:56 pmRAP - IAD

1 stop14h 26mUnited Airlines

Sat 10/112:45 pmIAD - RAP

1 stop5h 55mUnited Airlines

Deal found 9/11

$449

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 September 11, 2025.

Tue 10/78:30 amRAP - IAD

1 stop6h 13mUnited Airlines

Tue 10/146:30 amIAD - RAP

1 stop5h 43mUnited Airlines

Deal found 9/11

$349

Thu 2/1910:40 amRAP - IAD

2 stops10h 22mDelta

Mon 2/236:15 amIAD - RAP

1 stop5h 50mDelta

Deal found 9/9

$376

Thu 2/195:30 amRAP - IAD

1 stop5h 57mUnited Airlines

Mon 2/234:08 pmIAD - RAP

1 stop6h 25mUnited Airlines

Deal found 9/8

$349

Mon 10/65:50 pmRAP - IAD

1 stop9h 32mUnited Airlines

Tue 10/146:30 amIAD - RAP

1 stop5h 43mUnited Airlines

Deal found 9/11

$424

Mon 10/612:56 pmRAP - IAD

1 stop14h 26mUnited Airlines

Sun 10/126:30 amIAD - RAP

1 stop5h 43mUnited Airlines

Deal found 9/11

$424

Thu 10/912:56 pmRAP - IAD

1 stop8h 26mUnited Airlines

Sat 10/112:45 pmIAD - RAP

1 stop5h 55mUnited Airlines

Deal found 9/11

$427

Last-minute flights from Rapid City to Dulles Intl
Discover last-minute flight deals from Rapid City to Dulles Intl. Data last updated September 11, 2025 and is based on user searches.

Sat 10/47:00 amRAP - IAD

1 stop7h 58mUnited Airlines

Sun 10/56:30 amIAD - RAP

1 stop5h 43mUnited Airlines

Deal found 9/11

$269

Sat 10/45:30 amRAP - IAD

1 stop5h 56mUnited Airlines

Sat 10/45:17 pmIAD - RAP

2 stops18h 56mUnited Airlines

Deal found 9/11

$344

Mon 10/65:50 pmRAP - IAD

1 stop9h 32mUnited Airlines

Tue 10/146:30 amIAD - RAP

1 stop5h 43mUnited Airlines

Deal found 9/11

$424

Mon 10/64:34 pmRAP - IAD

1 stop5h 06mDelta

Tue 10/76:18 amIAD - RAP

1 stop5h 35mDelta

Deal found 9/9

$445

Mon 10/612:56 pmRAP - IAD

1 stop14h 26mUnited Airlines

Sat 10/112:45 pmIAD - RAP

1 stop5h 55mUnited Airlines

Deal found 9/11

$449

Tue 10/78:30 amRAP - IAD

1 stop6h 13mUnited Airlines

Tue 10/146:30 amIAD - RAP

1 stop5h 43mUnited Airlines

Deal found 9/11

$349

Tue 10/78:30 amRAP - IAD

1 stop6h 13mUnited Airlines

Sat 10/112:45 pmIAD - RAP

1 stop5h 55mUnited Airlines

Deal found 9/11

$374

Thu 10/912:56 pmRAP - IAD

1 stop8h 26mUnited Airlines

Sat 10/112:45 pmIAD - RAP

1 stop5h 55mUnited Airlines

Deal found 9/11

$427

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 September 11, 2025.

Wed 9/247:00 amRAP - IAD

1 stop6h 34mUnited Airlines

Deal found 9/10

$246

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 10/7

8:30 am-4:43 pm

1 stop6h 13m

Washington, D.C. Dulles Intl

Tue 10/14

6:30 am-10:13 am

1 stop5h 43m

$349

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Thu 2/19

5:30 am-1:27 pm

1 stop5h 57m

Washington, D.C. Dulles Intl

Mon 2/23

4:08 pm-8:33 pm

1 stop6h 25m

$349

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Thu 2/19

10:40 am-11:02 pm

2 stops10h 22m

Washington, D.C. Dulles Intl

Mon 2/23

6:15 am-10:05 am

1 stop5h 50m

$376

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Mon 10/6

5:50 pm-5:22 am

1 stop9h 32m

Washington, D.C. Dulles Intl

Tue 10/14

6:30 am-10:13 am

1 stop5h 43m

$424

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Mon 10/6

12:56 pm-5:22 am

1 stop14h 26m

Washington, D.C. Dulles Intl

Sun 10/12

6:30 am-10:13 am

1 stop5h 43m

$424

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Thu 10/9

12:56 pm-11:22 pm

1 stop8h 26m

Washington, D.C. Dulles Intl

Sat 10/11

2:45 pm-6:40 pm

1 stop5h 55m

$427

Rapid CityWashington, D.C.

RAP - IAD

RAPIAD

Rapid City

Wed 9/24

7:00 am-3:34 pm

1 stop6h 34m

$246

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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

8,937 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines

7.4

Good

8,937 reviews

United Airlines

7.4

Good

8,937 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

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 6h 13m. 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 $348 on this airline. Users have found that United Airlines is 40% cheaper than the other options available to this destination.
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.
What is the cheapest month to book a flight from Rapid City to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Rapid City to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Rapid City to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Rapid City to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$348	Average$565	FlexibilityNo cancel fee	On-time69%

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$246+ 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 9/24. 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

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 September 11, 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 September 11, 2025.

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.

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?

What is the cheapest month to book a flight from Rapid City to Washington, D.C. Dulles Intl Airport?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 September 11, 2025.