| Portsmouth to Busto Arsizio | 580.72 mi (934.58 km) |
| Portsmouth to Busto Garolfo | 584.94 mi (941.37 km) |
| Portsmouth to Cabras | 882.87 mi (1,420.85 km) |
| Portsmouth to Cadelbosco di Sopra | 683.12 mi (1,099.38 km) |
| Portsmouth to Cadoneghe | 703.85 mi (1,132.74 km) |
| Portsmouth to Cagli | 814.85 mi (1,311.38 km) |
| Portsmouth to Cagliari | 940.39 mi (1,513.41 km) |
| Portsmouth to Cairo Montenotte | 620.20 mi (998.12 km) |
| Portsmouth to Caivano | 1,002.09 mi (1,612.71 km) |
| Portsmouth to Calcinaia | 735.69 mi (1,183.98 km) |
| Portsmouth to Calcinato | 645.25 mi (1,038.43 km) |
| Portsmouth to Calderara di Reno | 716.80 mi (1,153.58 km) |
| Portsmouth to Caldogno | 680.60 mi (1,095.32 km) |
| Portsmouth to Calenzano | 746.05 mi (1,200.65 km) |
| Portsmouth to Calolziocorte | 593.59 mi (955.28 km) |
