There are
2,115 mi
from La Mesa, CA to Oshkosh, WI
That's the driving distance. It would take 1 day 13 hours to go from La Mesa, California to Oshkosh, Wisconsin.
The flight distance (direct flight from La Mesa, CA to Oshkosh, WI) is 1,715.28 mi.
2,115 mi = 3,403.98 kms