There are
1,852 mi
from Dubuque, IA to Walnut, CA
That's the driving distance. It would take 1 day 8 hours to go from Dubuque, Iowa to Walnut, California.
The flight distance (direct flight from Dubuque, IA to Walnut, CA) is 1,579.14 mi.
1,852 mi = 2,980.00 kms