There are
1,596 mi
from Downey, CA to Galveston, TX
That's the driving distance. It would take 1 day 3 hours to go from Downey, California to Galveston, Texas.
The flight distance (direct flight from Downey, CA to Galveston, TX) is 1,406.51 mi.
1,596 mi = 1.61 kms