There are
1,736 mi
from San Mateo, CA to Glenn Heights, TX
That's the driving distance. It would take 1 day 6 hours to go from San Mateo, California to Glenn Heights, Texas.
The flight distance (direct flight from San Mateo, CA to Glenn Heights, TX) is 1,476.64 mi.
1,736 mi = 2,794.20 kms