The calculated distance (air line) between Międzyrzec Podlaski and Bielany is approximately 81 miles respectively 131 kilometers.
By car or train, the actual journey to Bielany is certainly longer, as only the direct route (as the crow flies) between Międzyrzec Podlaski and Bielany has been calculated here.
Air line (approximately)
131 kilometers
70 nautical miles