There are
1,505 mi
from Rosenberg, TX to Fullerton, CA
That's the driving distance. It would take 1 day 1 hour to go from Rosenberg, Texas to Fullerton, California.
The flight distance (direct flight from Rosenberg, TX to Fullerton, CA) is 1,330.81 mi.
1,505 mi = 2,422.64 kms