There are
2,934 mi
from Danbury, CT to Walnut Creek, CA
That's the driving distance. It would take 2 days 3 hours to go from Danbury, Connecticut to Walnut Creek, California.
The flight distance (direct flight from Danbury, CT to Walnut Creek, CA) is 2,563.30 mi.
2,934 mi = 4,722.01 kms