There are
1,406 mi
from Lewisville, TX to Tustin, CA
That's the driving distance. It would take 1 day to go from Lewisville, Texas to Tustin, California.
The flight distance (direct flight from Lewisville, TX to Tustin, CA) is 1,200.62 mi.
1,406 mi = 2,263.47 kms