The calculated distance (air line) between Suwon and Yangp'yŏng is approximately 30 miles respectively 48 kilometers.
By car or train, the actual journey to Yangp'yŏng is certainly longer, as only the direct route (as the crow flies) between Suwon and Yangp'yŏng has been calculated here.
Air line (approximately)
48 kilometers
26 nautical miles