The calculated distance (air line) between Hwaseong-si and Chinch'ŏn is approximately 42 miles respectively 68 kilometers.
By car or train, the actual journey to Chinch'ŏn is certainly longer, as only the direct route (as the crow flies) between Hwaseong-si and Chinch'ŏn has been calculated here.
Air line (approximately)
68 kilometers
37 nautical miles