The calculated distance (air line) between Eringate-Centennial-West Deane and Markham is approximately 21 miles respectively 34 kilometers.
By car or train, the actual journey to Markham is certainly longer, as only the direct route (as the crow flies) between Eringate-Centennial-West Deane and Markham has been calculated here.
Air line (approximately)
34 kilometers
19 nautical miles