The calculated distance (air line) between Parkwoods-Donalda and Oshawa is approximately 26 miles respectively 42 kilometers.
By car or train, the actual journey to Oshawa is certainly longer, as only the direct route (as the crow flies) between Parkwoods-Donalda and Oshawa has been calculated here.
Air line (approximately)
42 kilometers
23 nautical miles