The calculated distance (air line) between Trongsa and Wangdue Phodrang is approximately 37 miles respectively 60 kilometers.
By car or train, the actual journey to Wangdue Phodrang is certainly longer, as only the direct route (as the crow flies) between Trongsa and Wangdue Phodrang has been calculated here.
Air line (approximately)
60 kilometers
32 nautical miles