There are
2,974 mi
from Somerville, MA to Monrovia, CA
That's the driving distance. It would take 2 days 5 hours to go from Somerville, Massachusetts to Monrovia, California.
The flight distance (direct flight from Somerville, MA to Monrovia, CA) is 2,573.49 mi.
2,974 mi = 3.22 kms