The calculated distance (air line) between Simitli and Veliko Tŭrnovo is approximately 152 miles respectively 245 kilometers.
By car or train, the actual journey to Veliko Tŭrnovo is certainly longer, as only the direct route (as the crow flies) between Simitli and Veliko Tŭrnovo has been calculated here.
Air line (approximately)
245 kilometers
132 nautical miles