| Portsmouth to Casamassima | 1,096.71 mi (1,764.98 km) |
| Portsmouth to Casandrino | 1,001.20 mi (1,611.28 km) |
| Portsmouth to Casapulla | 995.53 mi (1,602.15 km) |
| Portsmouth to Casarano | 1,188.76 mi (1,913.12 km) |
| Portsmouth to Casatenovo | 593.58 mi (955.28 km) |
| Portsmouth to Casciana Terme | 743.53 mi (1,196.60 km) |
| Portsmouth to Cascina | 733.38 mi (1,180.26 km) |
| Portsmouth to Caselle Torinese | 559.93 mi (901.12 km) |
| Portsmouth to Caserta | 997.28 mi (1,604.97 km) |
| Portsmouth to Casier | 710.21 mi (1,142.98 km) |
| Portsmouth to Casorate Primo | 600.36 mi (966.18 km) |
| Portsmouth to Casoria | 1,004.66 mi (1,616.84 km) |
| Portsmouth to Cassano al Ionio | 1,133.05 mi (1,823.47 km) |
| Portsmouth to Cassano d'Adda | 608.52 mi (979.31 km) |
| Portsmouth to Cassano delle Murge | 1,094.37 mi (1,761.22 km) |
