There are
2,979 mi
from Simi Valley, CA to Concord, NH
That's the driving distance. It would take 2 days 6 hours to go from Simi Valley, California to Concord, New Hampshire.
The flight distance (direct flight from Simi Valley, CA to Concord, NH) is 2,583.96 mi.
2,979 mi = 3.22 kms