There are
982 mi
from Yakima, WA to Lompoc, CA
That's the driving distance. It would take 19 hours 30 mins to go from Yakima, Washington to Lompoc, California.
The flight distance (direct flight from Yakima, WA to Lompoc, CA) is 826.57 mi.
982 mi = 1,579.89 kms