The calculated distance (air line) between Polonnaruwa and Sri Jayewardenepura Kotte is approximately 105 miles respectively 169 kilometers.
By car or train, the actual journey to Sri Jayewardenepura Kotte is certainly longer, as only the direct route (as the crow flies) between Polonnaruwa and Sri Jayewardenepura Kotte has been calculated here.
Air line (approximately)
169 kilometers
91 nautical miles