| Ilmenau to Bombarral | 1,251.87 mi (2,014.69 km) |
| Ilmenau to Bougado | 1,130.58 mi (1,819.49 km) |
| Ilmenau to Braga | 1,115.45 mi (1,795.15 km) |
| Ilmenau to Braganca | 1,039.57 mi (1,673.02 km) |
| Ilmenau to Cabeceiras de Basto | 1,100.54 mi (1,771.15 km) |
| Ilmenau to Cacem | 1,282.33 mi (2,063.71 km) |
| Ilmenau to Cadaval | 1,251.52 mi (2,014.13 km) |
| Ilmenau to Caldas da Rainha | 1,244.29 mi (2,002.49 km) |
| Ilmenau to Calheta | 1,887.11 mi (3,037.00 km) |
| Ilmenau to Camara de Lobos | 1,881.63 mi (3,028.19 km) |
| Ilmenau to Canico | 1,879.67 mi (3,025.04 km) |
| Ilmenau to Cantanhede | 1,178.29 mi (1,896.27 km) |
| Ilmenau to Carregal do Sal | 1,151.62 mi (1,853.36 km) |
| Ilmenau to Cartaxo | 1,243.89 mi (2,001.85 km) |
| Ilmenau to Cascais | 1,289.88 mi (2,075.87 km) |
