There are
1,600 mi
from Downey, CA to Weslaco, TX
That's the driving distance. It would take 1 day 3 hours to go from Downey, California to Weslaco, Texas.
The flight distance (direct flight from Downey, CA to Weslaco, TX) is 1,316.01 mi.
1,600 mi = 1.61 kms