There are
1,466 mi
from Rapid City, SD to Weslaco, TX
That's the driving distance. It would take 1 day 3 hours to go from Rapid City, South Dakota to Weslaco, Texas.
The flight distance (direct flight from Rapid City, SD to Weslaco, TX) is 1,272.43 mi.
1,466 mi = 2,359.12 kms