The calculated distance (air line) between Phôngsali and Dien Bien Phu is approximately 63 miles respectively 101 kilometers.
By car or train, the actual journey to Dien Bien Phu is certainly longer, as only the direct route (as the crow flies) between Phôngsali and Dien Bien Phu has been calculated here.
Air line (approximately)
101 kilometers
54 nautical miles