There are
2,984 mi
from Sunnyvale, CA to Danbury, CT
That's the driving distance. It would take 2 days 4 hours to go from Sunnyvale, California to Danbury, Connecticut.
The flight distance (direct flight from Sunnyvale, CA to Danbury, CT) is 2,575.38 mi.
2,984 mi = 3.22 kms