There are
1,040 mi
from Thornton, CO to Lawndale, CA
That's the driving distance. It would take 18 hours 14 mins to go from Thornton, Colorado to Lawndale, California.
The flight distance (direct flight from Thornton, CO to Lawndale, CA) is 845.85 mi.
1,040 mi = 1.61 kms