The calculated distance (air line) between Puttalam and Dehiwala-Mount Lavinia is approximately 83 miles respectively 133 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 Puttalam and Dehiwala-Mount Lavinia has been calculated here.
Air line (approximately)
133 kilometers
72 nautical miles