There are
1,243 mi
from Thornton, CO to Rohnert Park, CA
That's the driving distance. It would take 21 hours 28 mins to go from Thornton, Colorado to Rohnert Park, California.
The flight distance (direct flight from Thornton, CO to Rohnert Park, CA) is 954.83 mi.
1,243 mi = 1,999.70 kms