There are
2,403 mi
from Palo Alto, CA to Erlanger, KY
That's the driving distance. It would take 1 day 18 hours to go from Palo Alto, California to Erlanger, Kentucky.
The flight distance (direct flight from Palo Alto, CA to Erlanger, KY) is 2,026.06 mi.
2,403 mi = 3,867.65 kms