There are
1,432 mi
from Simi Valley, CA to Harker Heights, TX
That's the driving distance. It would take 1 day to go from Simi Valley, California to Harker Heights, Texas.
The flight distance (direct flight from Simi Valley, CA to Harker Heights, TX) is 1,245.58 mi.
1,432 mi = 1.61 kms