The calculated distance (air line) between Abadan and Gonbad-e Kāvūs is approximately 175 miles respectively 281 kilometers.
By car or train, the actual journey to Gonbad-e Kāvūs is certainly longer, as only the direct route (as the crow flies) between Abadan and Gonbad-e Kāvūs has been calculated here.
Air line (approximately)
281 kilometers
152 nautical miles