The calculated distance (air line) between Sevlievo and Veliko Tŭrnovo is approximately 26 miles respectively 42 kilometers.
By car or train, the actual journey to Veliko Tŭrnovo is certainly longer, as only the direct route (as the crow flies) between Sevlievo and Veliko Tŭrnovo has been calculated here.
Air line (approximately)
42 kilometers
23 nautical miles