The calculated distance (air line) between Phôngsali and Luang Prabang is approximately 124 miles respectively 199 kilometers.
By car or train, the actual journey to Luang Prabang is certainly longer, as only the direct route (as the crow flies) between Phôngsali and Luang Prabang has been calculated here.
Air line (approximately)
199 kilometers
107 nautical miles