| Herstal to Montemor-o-Novo | 1,069.99 mi (1,721.98 km) |
| Herstal to Montemor-o-Velho | 1,000.82 mi (1,610.67 km) |
| Herstal to Montijo | 1,089.38 mi (1,753.18 km) |
| Herstal to Mortagua | 971.61 mi (1,563.66 km) |
| Herstal to Moura | 1,076.89 mi (1,733.09 km) |
| Herstal to Murtosa | 968.93 mi (1,559.34 km) |
| Herstal to Nazare | 1,044.13 mi (1,680.36 km) |
| Herstal to Nelas | 954.57 mi (1,536.23 km) |
| Herstal to Obidos | 1,060.30 mi (1,706.39 km) |
| Herstal to Odemira | 1,143.78 mi (1,840.74 km) |
| Herstal to Odivelas | 1,092.30 mi (1,757.89 km) |
| Herstal to Oeiras | 1,102.64 mi (1,774.52 km) |
| Herstal to Olhao | 1,153.27 mi (1,856.01 km) |
| Herstal to Oliveira de Azemeis | 957.95 mi (1,541.67 km) |
| Herstal to Oliveira de Frades | 954.75 mi (1,536.52 km) |
