The calculated distance (air line) between Teteven and Veliko Tŭrnovo is approximately 70 miles respectively 112 kilometers.
By car or train, the actual journey to Veliko Tŭrnovo is certainly longer, as only the direct route (as the crow flies) between Teteven and Veliko Tŭrnovo has been calculated here.
Air line (approximately)
112 kilometers
61 nautical miles