The calculated distance (air line) between Sŭngjibaegam and Hwasŏng is approximately 36 miles respectively 58 kilometers.
By car or train, the actual journey to Hwasŏng is certainly longer, as only the direct route (as the crow flies) between Sŭngjibaegam and Hwasŏng has been calculated here.
Air line (approximately)
58 kilometers
31 nautical miles