There are
1,940 mi
from Porterville, CA to Dubuque, IA
That's the driving distance. It would take 1 day 10 hours to go from Porterville, California to Dubuque, Iowa.
The flight distance (direct flight from Porterville, CA to Dubuque, IA) is 1,571.80 mi.
1,940 mi = 3,121.40 kms