| Portsmouth to Caltagirone | 1,211.22 mi (1,949.27 km) |
| Portsmouth to Caltanissetta | 1,182.88 mi (1,903.66 km) |
| Portsmouth to Calvisano | 647.46 mi (1,041.99 km) |
| Portsmouth to Calvizzano | 1,000.59 mi (1,610.30 km) |
| Portsmouth to Camaiore | 712.29 mi (1,146.33 km) |
| Portsmouth to Cameri | 578.70 mi (931.33 km) |
| Portsmouth to Camisano Vicentino | 692.67 mi (1,114.74 km) |
| Portsmouth to Campagna | 1,044.71 mi (1,681.30 km) |
| Portsmouth to Campagnano di Roma | 874.97 mi (1,408.13 km) |
| Portsmouth to Campi Bisenzio | 747.27 mi (1,202.62 km) |
| Portsmouth to Campi Salentina | 1,164.47 mi (1,874.03 km) |
| Portsmouth to Campiglia Marittima | 766.93 mi (1,234.26 km) |
| Portsmouth to Campobasso | 984.01 mi (1,583.61 km) |
| Portsmouth to Campobello di Licata | 1,192.22 mi (1,918.70 km) |
| Portsmouth to Campobello di Mazara | 1,135.22 mi (1,826.97 km) |
