Miles between Diamond Bar, CA and San Marcos, TX

There are
1,346 mi
from Diamond Bar, CA to San Marcos, TX

That's the driving distance. It would take 23 hours 8 mins to go from Diamond Bar, California to San Marcos, Texas.

The flight distance (direct flight from Diamond Bar, CA to San Marcos, TX) is 1,197.31 mi.

1,346 mi = 2,166.53 kms