| Portsmouth to Celano | 918.47 mi (1,478.14 km) |
| Portsmouth to Cento | 709.87 mi (1,142.42 km) |
| Portsmouth to Cepagatti | 923.10 mi (1,485.59 km) |
| Portsmouth to Ceprano | 944.05 mi (1,519.29 km) |
| Portsmouth to Cercola | 1,008.11 mi (1,622.40 km) |
| Portsmouth to Cerea | 686.78 mi (1,105.26 km) |
| Portsmouth to Cerese | 675.81 mi (1,087.61 km) |
| Portsmouth to Cerignola | 1,043.68 mi (1,679.64 km) |
| Portsmouth to Cermenate | 585.12 mi (941.66 km) |
| Portsmouth to Cernusco sul Naviglio | 602.55 mi (969.71 km) |
| Portsmouth to Cerreto Guidi | 740.88 mi (1,192.32 km) |
| Portsmouth to Cerro Maggiore | 584.82 mi (941.18 km) |
| Portsmouth to Certaldo | 757.19 mi (1,218.58 km) |
| Portsmouth to Cerveteri | 872.17 mi (1,403.63 km) |
| Portsmouth to Cervia | 771.34 mi (1,241.36 km) |
