There are
1,120 mi
from St George, UT to Sammamish, WA
That's the driving distance. It would take 19 hours 24 mins to go from St George, Utah to Sammamish, Washington.
The flight distance (direct flight from St George, UT to Sammamish, WA) is 846.96 mi.
1,120 mi = 1.61 kms