The calculated distance (air line) between Sargodha and Dera Ismail Khan is approximately 105 miles respectively 170 kilometers.
By car or train, the actual journey to Dera Ismail Khan is certainly longer, as only the direct route (as the crow flies) between Sargodha and Dera Ismail Khan has been calculated here.
Air line (approximately)
170 kilometers
92 nautical miles