There are
1,599 mi
from Pasadena, TX to Simi Valley, CA
That's the driving distance. It would take 1 day 3 hours to go from Pasadena, Texas to Simi Valley, California.
The flight distance (direct flight from Pasadena, TX to Simi Valley, CA) is 1,413.76 mi.
1,599 mi = 1.61 kms