The calculated distance (air line) between Chak Thirty-one -Eleven Left and Okara is approximately 52 miles respectively 84 kilometers.
By car or train, the actual journey to Okara is certainly longer, as only the direct route (as the crow flies) between Chak Thirty-one -Eleven Left and Okara has been calculated here.
Air line (approximately)
84 kilometers
45 nautical miles