There are
1,588 mi
from Lewisville, TX to Merced, CA
That's the driving distance. It would take 1 day 3 hours to go from Lewisville, Texas to Merced, California.
The flight distance (direct flight from Lewisville, TX to Merced, CA) is 1,355 mi.
1,588 mi = 2,555.68 kms