There are
978 mi
from Somerville, MA to Pewaukee, WI
That's the driving distance. It would take 19 hours 50 mins to go from Somerville, Massachusetts to Pewaukee, Wisconsin.
The flight distance (direct flight from Somerville, MA to Pewaukee, WI) is 868.60 mi.
978 mi = 1,574.18 kms