The calculated distance (air line) between Muang Phôn-Hông and Sainyabuli is approximately 70 miles respectively 113 kilometers.
By car or train, the actual journey to Sainyabuli is certainly longer, as only the direct route (as the crow flies) between Muang Phôn-Hông and Sainyabuli has been calculated here.
Air line (approximately)
113 kilometers
61 nautical miles