There are
1,974 mi
from Tomball, TX to Clearlake, CA
That's the driving distance. It would take 1 day 11 hours to go from Tomball, Texas to Clearlake, California.
The flight distance (direct flight from Tomball, TX to Clearlake, CA) is 1,647.11 mi.
1,974 mi = 3,177.14 kms