The calculated distance (air line) between Hwaseong-si and Yangp'yŏng is approximately 42 miles respectively 67 kilometers.
By car or train, the actual journey to Yangp'yŏng is certainly longer, as only the direct route (as the crow flies) between Hwaseong-si and Yangp'yŏng has been calculated here.
Air line (approximately)
67 kilometers
36 nautical miles