| Isernia to Bombarral | 1,237.00 mi (1,990.75 km) |
| Isernia to Bougado | 1,177.03 mi (1,894.24 km) |
| Isernia to Braga | 1,167.82 mi (1,879.43 km) |
| Isernia to Braganca | 1,080.58 mi (1,739.02 km) |
| Isernia to Cabeceiras de Basto | 1,147.31 mi (1,846.42 km) |
| Isernia to Cacem | 1,254.23 mi (2,018.48 km) |
| Isernia to Cadaval | 1,234.76 mi (1,987.16 km) |
| Isernia to Caldas da Rainha | 1,233.53 mi (1,985.18 km) |
| Isernia to Calheta | 1,822.71 mi (2,933.37 km) |
| Isernia to Camara de Lobos | 1,814.16 mi (2,919.61 km) |
| Isernia to Canico | 1,809.47 mi (2,912.05 km) |
| Isernia to Cantanhede | 1,190.81 mi (1,916.43 km) |
| Isernia to Carregal do Sal | 1,158.97 mi (1,865.19 km) |
| Isernia to Cartaxo | 1,219.91 mi (1,963.26 km) |
| Isernia to Cascais | 1,261.22 mi (2,029.74 km) |
