The calculated distance (air line) between Cheongju-si and Gapyeong is approximately 83 miles respectively 133 kilometers.
By car or train, the actual journey to Gapyeong is certainly longer, as only the direct route (as the crow flies) between Cheongju-si and Gapyeong has been calculated here.
Air line (approximately)
133 kilometers
72 nautical miles