There are
1,514 mi
from Tomball, TX to Downey, CA
That's the driving distance. It would take 1 day 2 hours to go from Tomball, Texas to Downey, California.
The flight distance (direct flight from Tomball, TX to Downey, CA) is 1,342.66 mi.
1,514 mi = 2,437.22 kms