Allegiant AirDepart14:56
Thu, Nov 12RAP → IAD
11h 51m · 3 stops
$370one way, per person
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- Cheapest fare
- $370
- Cheapest month
- November
- Direct flights
- Not recently
- Quickest trip
- 11h 51m
Allegiant Air · Thu, Nov 12
from $370
Usually 1+ stop
2,250 km
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Cheapest month to fly from Rapid City to Washington
Lowest one-way fare per person in each month. Choose a month to see every date.
Cheapest dates in November 2026
The lowest fares we've seen for each day, cheapest first.
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About flights from Rapid City to Washington
Rapid City (RAP) and Washington (WAS) are about 2,250 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 11h 51m. Over the next few months, one-way fares start from $370, and November 2026 is currently the cheapest month to fly.
These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.
Frequently asked questions
How much is a flight from Rapid City to Washington?
The cheapest one-way fare we've seen recently is $370 with Allegiant Air, departing Thursday, November 12, 2026.
What is the cheapest month to fly from Rapid City to Washington?
November 2026 currently has the lowest fares, from $370 one way.
Are there direct flights from Rapid City to Washington?
We haven't seen direct fares recently, so most journeys include at least one stop.
How long is the flight from Rapid City to Washington?
The quickest journey we've seen takes about 11h 51m. Rapid City and Washington are around 2,250 km apart.
Which airlines fly from Rapid City to Washington?
Recent fares on this route were with Allegiant Air.
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