| Portsmouth to Carmignano | 743.14 mi (1,195.97 km) |
| Portsmouth to Carovigno | 1,136.84 mi (1,829.57 km) |
| Portsmouth to Carpenedolo | 649.97 mi (1,046.03 km) |
| Portsmouth to Carpi | 692.77 mi (1,114.91 km) |
| Portsmouth to Carrara | 698.14 mi (1,123.54 km) |
| Portsmouth to Carugate | 601.04 mi (967.28 km) |
| Portsmouth to Casal di Principe | 992.85 mi (1,597.83 km) |
| Portsmouth to Casale Monferrato | 589.53 mi (948.76 km) |
| Portsmouth to Casale sul Sile | 713.51 mi (1,148.29 km) |
| Portsmouth to Casalecchio di Reno | 721.23 mi (1,160.71 km) |
| Portsmouth to Casalgrande | 696.47 mi (1,120.86 km) |
| Portsmouth to Casalmaggiore | 666.29 mi (1,072.30 km) |
| Portsmouth to Casalnuovo di Napoli | 1,005.55 mi (1,618.27 km) |
| Portsmouth to Casalpusterlengo | 629.59 mi (1,013.22 km) |
| Portsmouth to Casaluce | 996.03 mi (1,602.96 km) |
