The calculated distance (air line) between Yonge-St.Clair and Kitchener is approximately 59 miles respectively 94 kilometers.
By car or train, the actual journey to Kitchener is certainly longer, as only the direct route (as the crow flies) between Yonge-St.Clair and Kitchener has been calculated here.
Air line (approximately)
94 kilometers
51 nautical miles