The calculated distance (air line) between Songgangdong and Chinch'ŏn is approximately 29 miles respectively 47 kilometers.
By car or train, the actual journey to Chinch'ŏn is certainly longer, as only the direct route (as the crow flies) between Songgangdong and Chinch'ŏn has been calculated here.
Air line (approximately)
47 kilometers
26 nautical miles