The calculated distance (air line) between Kilinochchi and Sri Jayewardenepura Kotte is approximately 177 miles respectively 285 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 Kilinochchi and Sri Jayewardenepura Kotte has been calculated here.
Air line (approximately)
285 kilometers
154 nautical miles