| Ilmenau to Montemor-o-Novo | 1,248.47 mi (2,009.22 km) |
| Ilmenau to Montemor-o-Velho | 1,190.28 mi (1,915.57 km) |
| Ilmenau to Montijo | 1,271.66 mi (2,046.54 km) |
| Ilmenau to Mortagua | 1,160.43 mi (1,867.54 km) |
| Ilmenau to Moura | 1,248.12 mi (2,008.65 km) |
| Ilmenau to Murtosa | 1,161.43 mi (1,869.14 km) |
| Ilmenau to Nazare | 1,232.24 mi (1,983.10 km) |
| Ilmenau to Nelas | 1,141.96 mi (1,837.80 km) |
| Ilmenau to Obidos | 1,247.53 mi (2,007.70 km) |
| Ilmenau to Odemira | 1,318.83 mi (2,122.45 km) |
| Ilmenau to Odivelas | 1,276.57 mi (2,054.45 km) |
| Ilmenau to Oeiras | 1,287.02 mi (2,071.25 km) |
| Ilmenau to Olhao | 1,320.90 mi (2,125.78 km) |
| Ilmenau to Oliveira de Azemeis | 1,150.35 mi (1,851.30 km) |
| Ilmenau to Oliveira de Frades | 1,145.01 mi (1,842.72 km) |
