The calculated distance (air line) between Cheongju-si and Hongch’ŏn is approximately 76 miles respectively 122 kilometers.
By car or train, the actual journey to Hongch’ŏn is certainly longer, as only the direct route (as the crow flies) between Cheongju-si and Hongch’ŏn has been calculated here.
Air line (approximately)
122 kilometers
66 nautical miles