Miles between St George, UT and Boise, ID

There are
642 mi
from St George, UT to Boise, ID

That's the driving distance. It would take 10 hours 33 mins to go from St George, Utah to Boise, Idaho.

The flight distance (direct flight from St George, UT to Boise, ID) is 471.58 mi.

642 mi = 1,032.84 kms