The calculated distance (air line) between Muang Xay and Ban Houayxay is approximately 105 miles respectively 170 kilometers.
By car or train, the actual journey to Ban Houayxay is certainly longer, as only the direct route (as the crow flies) between Muang Xay and Ban Houayxay has been calculated here.
Air line (approximately)
170 kilometers
92 nautical miles