The calculated distance (air line) between Ban Siphôm and Luang Prabang is approximately 93 miles respectively 149 kilometers.
By car or train, the actual journey to Luang Prabang is certainly longer, as only the direct route (as the crow flies) between Ban Siphôm and Luang Prabang has been calculated here.
Air line (approximately)
149 kilometers
80 nautical miles