There are
1,423 mi
from Allen, TX to Rancho Cucamonga, CA
That's the driving distance. It would take 1 day to go from Allen, Texas to Rancho Cucamonga, California.
The flight distance (direct flight from Allen, TX to Rancho Cucamonga, CA) is 1,203.90 mi.
1,423 mi = 1.61 kms