There are
2,751 mi
from Somerville, NJ to Santee, CA
That's the driving distance. It would take 2 days 1 hour to go from Somerville, New Jersey to Santee, California.
The flight distance (direct flight from Somerville, NJ to Santee, CA) is 2,382.83 mi.
2,751 mi = 4,427.99 kms