There are
1,275 mi
from San Leandro, CA to Gillette, WY
That's the driving distance. It would take 22 hours 12 mins to go from San Leandro, California to Gillette, Wyoming.
The flight distance (direct flight from San Leandro, CA to Gillette, WY) is 977.15 mi.
1,275 mi = 1.61 kms