The calculated distance (air line) between Karachi and Tando Allahyar is approximately 115 miles respectively 184 kilometers.
By car or train, the actual journey to Tando Allahyar is certainly longer, as only the direct route (as the crow flies) between Karachi and Tando Allahyar has been calculated here.
Air line (approximately)
184 kilometers
99 nautical miles