The calculated distance (air line) between Horodnic de Sus and Gura Humorului is approximately 20 miles respectively 33 kilometers.
By car or train, the actual journey to Gura Humorului is certainly longer, as only the direct route (as the crow flies) between Horodnic de Sus and Gura Humorului has been calculated here.
Air line (approximately)
33 kilometers
18 nautical miles