There are
1,043 mi
from Sioux City, IA to Johnstown, PA
That's the driving distance. It would take 19 hours 25 mins to go from Sioux City, Iowa to Johnstown, Pennsylvania.
The flight distance (direct flight from Sioux City, IA to Johnstown, PA) is 916.34 mi.
1,043 mi = 1,679.10 kms