There are
2,981 mi
from Nashua, NH to Walnut, CA
That's the driving distance. It would take 2 days 5 hours to go from Nashua, New Hampshire to Walnut, California.
The flight distance (direct flight from Nashua, NH to Walnut, CA) is 2,550.54 mi.
2,981 mi = 3.22 kms