There are
1,885 mi
from Upland, CA to Picayune, MS
That's the driving distance. It would take 1 day 8 hours to go from Upland, California to Picayune, Mississippi.
The flight distance (direct flight from Upland, CA to Picayune, MS) is 1,646.52 mi.
1,885 mi = 1.61 kms