There are
815 mi
from Pasadena, TX to Shelbyville, TN
That's the driving distance. It would take 15 hours 5 mins to go from Pasadena, Texas to Shelbyville, Tennessee.
The flight distance (direct flight from Pasadena, TX to Shelbyville, TN) is 647.25 mi.
815 mi = 1,312.32 kms