There are
1,303 mi
from Rapid City, SD to Seguin, TX
That's the driving distance. It would take 22 hours 59 mins to go from Rapid City, South Dakota to Seguin, Texas.
The flight distance (direct flight from Rapid City, SD to Seguin, TX) is 1,043.51 mi.
1,303 mi = 2,097.47 kms