The calculated distance (air line) between Badulla and Dehiwala-Mount Lavinia is approximately 82 miles respectively 132 kilometers.
By car or train, the actual journey to Dehiwala-Mount Lavinia is certainly longer, as only the direct route (as the crow flies) between Badulla and Dehiwala-Mount Lavinia has been calculated here.
Air line (approximately)
132 kilometers
71 nautical miles