The calculated distance (air line) between Manbij and ‘Ayn al ‘Arab is approximately 33 miles respectively 54 kilometers.
By car or train, the actual journey to ‘Ayn al ‘Arab is certainly longer, as only the direct route (as the crow flies) between Manbij and ‘Ayn al ‘Arab has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles