The calculated distance (air line) between Muang Phôn-Hông and Vang Vieng is approximately 30 miles respectively 48 kilometers.
By car or train, the actual journey to Vang Vieng is certainly longer, as only the direct route (as the crow flies) between Muang Phôn-Hông and Vang Vieng has been calculated here.
Air line (approximately)
48 kilometers
26 nautical miles