The calculated distance (air line) between Nuwara Eliya and Dehiwala-Mount Lavinia is approximately 63 miles respectively 102 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 Nuwara Eliya and Dehiwala-Mount Lavinia has been calculated here.
Air line (approximately)
102 kilometers
55 nautical miles