| Portsmouth to Corato | 1,067.82 mi (1,718.49 km) |
| Portsmouth to Corbetta | 589.78 mi (949.15 km) |
| Portsmouth to Corciano | 821.48 mi (1,322.04 km) |
| Portsmouth to Cordenons | 713.37 mi (1,148.06 km) |
| Portsmouth to Cori | 918.29 mi (1,477.85 km) |
| Portsmouth to Coriano | 793.72 mi (1,277.36 km) |
| Portsmouth to Corigliano Calabro | 1,149.58 mi (1,850.06 km) |
| Portsmouth to Corleone | 1,140.92 mi (1,836.14 km) |
| Portsmouth to Cormano | 594.96 mi (957.50 km) |
| Portsmouth to Cornaredo | 592.43 mi (953.42 km) |
| Portsmouth to Cornate d'Adda | 601.45 mi (967.95 km) |
| Portsmouth to Cornedo Vicentino | 674.30 mi (1,085.18 km) |
| Portsmouth to Correggio | 689.64 mi (1,109.87 km) |
| Portsmouth to Corridonia | 860.92 mi (1,385.51 km) |
| Portsmouth to Corsico | 598.51 mi (963.21 km) |
