The calculated distance (air line) between Serowe and Selebi-Phikwe is approximately 78 miles respectively 125 kilometers.
By car or train, the actual journey to Selebi-Phikwe is certainly longer, as only the direct route (as the crow flies) between Serowe and Selebi-Phikwe has been calculated here.
Air line (approximately)
125 kilometers
68 nautical miles