There are
1,047 mi
from Rancho Cucamonga, CA to Dumas, TX
That's the driving distance. It would take 18 hours 9 mins to go from Rancho Cucamonga, California to Dumas, Texas.
The flight distance (direct flight from Rancho Cucamonga, CA to Dumas, TX) is 891.55 mi.
1,047 mi = 1,685.28 kms