There are
1,743 mi
from San Rafael, CA to Duncanville, TX
That's the driving distance. It would take 1 day 6 hours to go from San Rafael, California to Duncanville, Texas.
The flight distance (direct flight from San Rafael, CA to Duncanville, TX) is 1,485.47 mi.
1,743 mi = 2,805.64 kms