There are
1,337 mi
from Sioux City, IA to Boulder City, NV
That's the driving distance. It would take 23 hours 51 mins to go from Sioux City, Iowa to Boulder City, Nevada.
The flight distance (direct flight from Sioux City, IA to Boulder City, NV) is 1,081.38 mi.
1,337 mi = 2,152.32 kms