There are
2,757 mi
from Gaithersburg, MD to Lacey, WA
That's the driving distance. It would take 2 days 1 hour to go from Gaithersburg, Maryland to Lacey, Washington.
The flight distance (direct flight from Gaithersburg, MD to Lacey, WA) is 2,330.74 mi.
2,757 mi = 4,437.66 kms