There are
743 mi
from Flagstaff, AZ to Menlo Park, CA
That's the driving distance. It would take 13 hours 36 mins to go from Flagstaff, Arizona to Menlo Park, California.
The flight distance (direct flight from Flagstaff, AZ to Menlo Park, CA) is 606.78 mi.
743 mi = 1,196.01 kms