| Issum to Bombarral | 1,131.04 mi (1,820.23 km) |
| Issum to Bougado | 999.23 mi (1,608.10 km) |
| Issum to Braga | 983.33 mi (1,582.51 km) |
| Issum to Braganca | 915.28 mi (1,472.99 km) |
| Issum to Cabeceiras de Basto | 970.80 mi (1,562.36 km) |
| Issum to Cacem | 1,163.69 mi (1,872.77 km) |
| Issum to Cadaval | 1,131.22 mi (1,820.53 km) |
| Issum to Caldas da Rainha | 1,122.69 mi (1,806.79 km) |
| Issum to Calheta | 1,759.44 mi (2,831.54 km) |
| Issum to Camara de Lobos | 1,754.86 mi (2,824.17 km) |
| Issum to Canico | 1,753.65 mi (2,822.22 km) |
| Issum to Cantanhede | 1,053.64 mi (1,695.67 km) |
| Issum to Carregal do Sal | 1,029.87 mi (1,657.41 km) |
| Issum to Cartaxo | 1,125.95 mi (1,812.04 km) |
| Issum to Cascais | 1,171.05 mi (1,884.62 km) |
