The calculated distance (air line) between Mejdan - Obilićevo and Gradačac is approximately 61 miles respectively 98 kilometers.
By car or train, the actual journey to Gradačac is certainly longer, as only the direct route (as the crow flies) between Mejdan - Obilićevo and Gradačac has been calculated here.
Air line (approximately)
98 kilometers
53 nautical miles