There are
3,199 mi
from Redwood City, CA to Somersworth, NH
That's the driving distance. It would take 2 days 9 hours to go from Redwood City, California to Somersworth, New Hampshire.
The flight distance (direct flight from Redwood City, CA to Somersworth, NH) is 2,690.47 mi.
3,199 mi = 5,147.89 kms