The calculated distance (air line) between Phuntsholing and Samdrup Jongkhar is approximately 131 miles respectively 210 kilometers.
By car or train, the actual journey to Samdrup Jongkhar is certainly longer, as only the direct route (as the crow flies) between Phuntsholing and Samdrup Jongkhar has been calculated here.
Air line (approximately)
210 kilometers
113 nautical miles