There are
990 mi
from Oshkosh, WI to Westbury, NY
That's the driving distance. It would take 18 hours 38 mins to go from Oshkosh, Wisconsin to Westbury, New York.
The flight distance (direct flight from Oshkosh, WI to Westbury, NY) is 794.59 mi.
990 mi = 1,592.89 kms