| Portsmouth to Campodarsego | 701.16 mi (1,128.40 km) |
| Portsmouth to Campogalliano | 696.12 mi (1,120.29 km) |
| Portsmouth to Campolongo Maggiore | 713.20 mi (1,147.78 km) |
| Portsmouth to Camponogara | 711.79 mi (1,145.52 km) |
| Portsmouth to Camposampiero | 699.10 mi (1,125.09 km) |
| Portsmouth to Canegrate | 585.75 mi (942.67 km) |
| Portsmouth to Canelli | 604.56 mi (972.94 km) |
| Portsmouth to Canicatti | 1,183.48 mi (1,904.62 km) |
| Portsmouth to Canosa di Puglia | 1,052.25 mi (1,693.44 km) |
| Portsmouth to Cantu | 585.46 mi (942.20 km) |
| Portsmouth to Caorle | 735.37 mi (1,183.47 km) |
| Portsmouth to Capaci | 1,118.81 mi (1,800.55 km) |
| Portsmouth to Capannori | 725.69 mi (1,167.89 km) |
| Portsmouth to Capena | 880.03 mi (1,416.27 km) |
| Portsmouth to Capo d'Orlando | 1,166.78 mi (1,877.76 km) |
