The calculated distance (air line) between Muang Phônsavan and Vang Vieng is approximately 61 miles respectively 98 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 Phônsavan and Vang Vieng has been calculated here.
Air line (approximately)
98 kilometers
53 nautical miles