There are
1,972 mi
from Walnut Creek, CA to Dubuque, IA
That's the driving distance. It would take 1 day 10 hours to go from Walnut Creek, California to Dubuque, Iowa.
The flight distance (direct flight from Walnut Creek, CA to Dubuque, IA) is 1,677.15 mi.
1,972 mi = 3,173.36 kms