There are
838 mi
from San Leandro, CA to Mukilteo, WA
That's the driving distance. It would take 16 hours 14 mins to go from San Leandro, California to Mukilteo, Washington.
The flight distance (direct flight from San Leandro, CA to Mukilteo, WA) is 706.15 mi.
838 mi = 1,348.06 kms