There are
1,787 mi
from Lewisville, TX to Clearlake, CA
That's the driving distance. It would take 1 day 7 hours to go from Lewisville, Texas to Clearlake, California.
The flight distance (direct flight from Lewisville, TX to Clearlake, CA) is 1,484.20 mi.
1,787 mi = 2,875.44 kms