The calculated distance (air line) between Wangdue Phodrang and Phuntsholing is approximately 54 miles respectively 87 kilometers.
By car or train, the actual journey to Phuntsholing is certainly longer, as only the direct route (as the crow flies) between Wangdue Phodrang and Phuntsholing has been calculated here.
Air line (approximately)
87 kilometers
47 nautical miles