The calculated distance (air line) between Bačko Petrovo Selo and Sombor is approximately 47 miles respectively 75 kilometers.
By car or train, the actual journey to Sombor is certainly longer, as only the direct route (as the crow flies) between Bačko Petrovo Selo and Sombor has been calculated here.
Air line (approximately)
75 kilometers
41 nautical miles