There are
922 mi
from Yakima, WA to San Luis Obispo, CA
That's the driving distance. It would take 18 hours 9 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.
922 mi = 1,483.14 kms