The calculated distance (air line) between Madan and Veliko Tŭrnovo is approximately 115 miles respectively 185 kilometers.
By car or train, the actual journey to Veliko Tŭrnovo is certainly longer, as only the direct route (as the crow flies) between Madan and Veliko Tŭrnovo has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles