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