The calculated distance (air line) between Dien Bien Phu and Hòa Bình is approximately 154 miles respectively 248 kilometers.
By car or train, the actual journey to Hòa Bình is certainly longer, as only the direct route (as the crow flies) between Dien Bien Phu and Hòa Bình has been calculated here.
Air line (approximately)
248 kilometers
134 nautical miles