The calculated distance (air line) between Sri Jayewardenepura Kotte and Trincomalee is approximately 148 miles respectively 238 kilometers.
By car or train, the actual journey to Trincomalee is certainly longer, as only the direct route (as the crow flies) between Sri Jayewardenepura Kotte and Trincomalee has been calculated here.
Air line (approximately)
238 kilometers
129 nautical miles