There are
2,125 mi
from St Louis, MO to Lacey, WA
That's the driving distance. It would take 1 day 13 hours to go from St Louis, Missouri to Lacey, Washington.
The flight distance (direct flight from St Louis, MO to Lacey, WA) is 1,737.23 mi.
2,125 mi = 3,419.62 kms