There are
779 mi
from Elk Grove, CA to Sammamish, WA
That's the driving distance. It would take 15 hours 5 mins to go from Elk Grove, California to Sammamish, Washington.
The flight distance (direct flight from Elk Grove, CA to Sammamish, WA) is 638.93 mi.
779 mi = 1,254.03 kms