There are
3,109 mi
from Hayward, CA to Waltham, MA
That's the driving distance. It would take 2 days 7 hours to go from Hayward, California to Waltham, Massachusetts.
The flight distance (direct flight from Hayward, CA to Waltham, MA) is 2,669.69 mi.
3,109 mi = 4.83 kms