There are
2,811 mi
from Allentown, PA to Clearlake, CA
That's the driving distance. It would take 2 days 1 hour to go from Allentown, Pennsylvania to Clearlake, California.
The flight distance (direct flight from Allentown, PA to Clearlake, CA) is 2,475.11 mi.
2,811 mi = 3.22 kms