There are
923 mi
from Yakima, WA to San Luis Obispo, CA
That's the driving distance. It would take 18 hours 20 mins to go from Yakima, Washington to San Luis Obispo, California.
The flight distance (direct flight from Yakima, WA to San Luis Obispo, CA) is 782.13 mi.
923 mi = 1,486.08 kms