There are
1,469 mi
from Rapid City, SD to Harlingen, TX
That's the driving distance. It would take 1 day 3 hours to go from Rapid City, South Dakota to Harlingen, Texas.
The flight distance (direct flight from Rapid City, SD to Harlingen, TX) is 1,274.23 mi.
1,469 mi = 2,364.83 kms