There are
1,995 mi
from Brownsville, TX to San Mateo, CA
That's the driving distance. It would take 1 day 11 hours to go from Brownsville, Texas to San Mateo, California.
The flight distance (direct flight from Brownsville, TX to San Mateo, CA) is 1,659.16 mi.
1,995 mi = 1.61 kms