There are
2,901 mi
from Waterbury, CT to Mercer Island, WA
That's the driving distance. It would take 2 days 3 hours to go from Waterbury, Connecticut to Mercer Island, Washington.
The flight distance (direct flight from Waterbury, CT to Mercer Island, WA) is 2,414.31 mi.
2,901 mi = 4,668.53 kms