The calculated distance (air line) between Sri Jayewardenepura Kotte and Ambalangoda is approximately 46 miles respectively 74 kilometers.
By car or train, the actual journey to Ambalangoda is certainly longer, as only the direct route (as the crow flies) between Sri Jayewardenepura Kotte and Ambalangoda has been calculated here.
Air line (approximately)
74 kilometers
40 nautical miles