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$342 Cheap Flights from Washington (WAS) to Rapid City (RAP)

View $331 flight on Wed, Jan 20, 2027

Popular airlines from Washington to Rapid City, SD (RAP-Rapid City Regional)

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    • Cheap Flights from Washington to Rapid City (WAS-RAP)

    Prices were available within the past 7 days and start at $342 for one-way flights and $331 for roundtrip, for the period specified. Prices and availability are subject to change.

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    One way

    Roundtrip

    Select American Airlines flight, departing Wed, Jan 20 from Washington to Rapid City, returning Wed, Jan 27, priced at $331 Found 2 days ago

    Wed, Jan 20 - Wed, Jan 27 · DCA · RAP · Roundtrip

    Select United flight, departing Wed, Jan 20 from Washington to Rapid City, returning Wed, Jan 27, priced at $331 Found 2 days ago

    Wed, Jan 20 - Wed, Jan 27 · DCA · RAP · Roundtrip

    Select Delta flight, departing Tue, May 4 from Washington to Rapid City, returning Tue, May 18, priced at $341 Found 1 day ago

    Tue, May 4 - Tue, May 18 · DCA · RAP · Roundtrip

    Select United flight, departing Wed, Jan 20 from Washington to Rapid City, returning Wed, Jan 27, priced at $341 Found 2 hours ago

    Wed, Jan 20 - Wed, Jan 27 · IAD · RAP · Roundtrip

    Select United flight, departing Fri, Dec 11 from Washington to Rapid City, returning Sat, Dec 12, priced at $345 Found 6 days ago

    Fri, Dec 11 - Sat, Dec 12 · DCA · RAP · Roundtrip

    Select Delta flight, departing Wed, Jan 20 from Washington to Rapid City, returning Wed, Jan 27, priced at $346 Found 2 hours ago

    Wed, Jan 20 - Wed, Jan 27 · IAD · RAP · Roundtrip

    Select United flight, departing Wed, Jan 13 from Washington to Rapid City, returning Sun, Jan 17, priced at $350 Found 2 days ago

    Wed, Jan 13 - Sun, Jan 17 · IAD · RAP · Roundtrip

    Select American Airlines flight, departing Wed, Jan 20 from Washington to Rapid City, returning Wed, Jan 27, priced at $354 Found 2 days ago

    Wed, Jan 20 - Wed, Jan 27 · DCA · RAP · Roundtrip

    Select United flight, departing Fri, Dec 11 from Washington to Rapid City, returning Sat, Dec 12, priced at $357 Found 6 days ago

    Fri, Dec 11 - Sat, Dec 12 · DCA · RAP · Roundtrip

    Select United flight, departing Sat, Feb 20 from Washington to Rapid City, returning Sat, Feb 27, priced at $359 Found 2 days ago

    Sat, Feb 20 - Sat, Feb 27 · IAD · RAP · Roundtrip

    Alternative airports near Rapid City

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

    Select flight to Rapid City Regional RAP. Cheapest and Closest option available. Average driving time to city center is 16 minutes. Flights from $1,018

    16 min

    Find the cheapest month to fly from Washington (WAS) to Rapid City (RAP)

    February is typically the cheapest month to fly

    From $259 - $315 per traveler.

    View flights in February

    Insights are based on prices from searches for economy trips of 10 days or less on our sites in the last 12 months. Insights are informative only and current prices may differ.

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    Washington to Rapid City Flights

    The cheapest times to fly from Washington to Rapid City

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

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

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

    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 Washington to Rapid City in 2026. You can also book with separate airlines for your outbound and return journeys, from $342 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 Washington to Rapid City 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 Washington to Rapid City 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.

    Travel information

    Origin airportWashington Dulles Intl. Airport
    Destination airportRapid City Regional Airport
    Distance1,364 miles away
    Airlines servingUnited, American Airlines, Delta
    Popular airlineUnited
    Roundtrip price$331

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    *Available to One Key members.