The calculated distance (air line) between Plovdiv and Veliko Tŭrnovo is approximately 78 miles respectively 126 kilometers.
By car or train, the actual journey to Veliko Tŭrnovo is certainly longer, as only the direct route (as the crow flies) between Plovdiv and Veliko Tŭrnovo has been calculated here.
Air line (approximately)
126 kilometers
68 nautical miles