The calculated distance (air line) between Bačko Petrovo Selo and Zaječar is approximately 164 miles respectively 264 kilometers.
By car or train, the actual journey to Zaječar is certainly longer, as only the direct route (as the crow flies) between Bačko Petrovo Selo and Zaječar has been calculated here.
Air line (approximately)
264 kilometers
143 nautical miles