There are
1,389 mi
from Lewisville, TX to Walnut, CA
That's the driving distance. It would take 1 day to go from Lewisville, Texas to Walnut, California.
The flight distance (direct flight from Lewisville, TX to Walnut, CA) is 1,201.84 mi.
1,389 mi = 2,235.94 kms