| Ilmenau to Castelo Branco | 1,163.30 mi (1,872.15 km) |
| Ilmenau to Castro Daire | 1,126.81 mi (1,813.43 km) |
| Ilmenau to Celorico de Basto | 1,106.79 mi (1,781.21 km) |
| Ilmenau to Chamusca | 1,222.81 mi (1,967.92 km) |
| Ilmenau to Chaves | 1,069.96 mi (1,721.94 km) |
| Ilmenau to Cinfaes | 1,125.07 mi (1,810.62 km) |
| Ilmenau to Coimbra | 1,178.53 mi (1,896.66 km) |
| Ilmenau to Condeixa-a-Nova | 1,185.76 mi (1,908.30 km) |
| Ilmenau to Corroios | 1,284.35 mi (2,066.96 km) |
| Ilmenau to Coruche | 1,244.14 mi (2,002.25 km) |
| Ilmenau to Costa de Caparica | 1,285.97 mi (2,069.56 km) |
| Ilmenau to Covilha | 1,140.21 mi (1,834.99 km) |
| Ilmenau to Eiras | 1,176.84 mi (1,893.94 km) |
| Ilmenau to Elvas | 1,199.10 mi (1,929.77 km) |
| Ilmenau to Entroncamento | 1,216.51 mi (1,957.78 km) |
