There are
2,147 mi
from San Mateo, CA to Brownsville, TN
That's the driving distance. It would take 1 day 13 hours to go from San Mateo, California to Brownsville, Tennessee.
The flight distance (direct flight from San Mateo, CA to Brownsville, TN) is 1,830.13 mi.
2,147 mi = 3.22 kms