There are
1,372 mi
from Simi Valley, CA to Hays, KS
That's the driving distance. It would take 1 day to go from Simi Valley, California to Hays, Kansas.
The flight distance (direct flight from Simi Valley, CA to Hays, KS) is 1,122.96 mi.
1,372 mi = 1.61 kms