There are
790 mi
from Pasadena, TX to Ballwin, MO
That's the driving distance. It would take 14 hours 43 mins to go from Pasadena, Texas to Ballwin, Missouri.
The flight distance (direct flight from Pasadena, TX to Ballwin, MO) is 670.24 mi.
790 mi = 1,270.64 kms