There are
3,095 mi
from Waltham, MA to Larkspur, CA
That's the driving distance. It would take 2 days 6 hours to go from Waltham, Massachusetts to Larkspur, California.
The flight distance (direct flight from Waltham, MA to Larkspur, CA) is 2,685.18 mi.
3,095 mi = 4,980.49 kms