| Trier to Montemor-o-Novo | 1,059.48 mi (1,705.07 km) |
| Trier to Montemor-o-Velho | 996.72 mi (1,604.06 km) |
| Trier to Montijo | 1,081.08 mi (1,739.83 km) |
| Trier to Mortagua | 967.05 mi (1,556.32 km) |
| Trier to Moura | 1,062.45 mi (1,709.84 km) |
| Trier to Murtosa | 966.73 mi (1,555.80 km) |
| Trier to Nazare | 1,039.26 mi (1,672.52 km) |
| Trier to Nelas | 949.08 mi (1,527.39 km) |
| Trier to Obidos | 1,054.91 mi (1,697.71 km) |
| Trier to Odemira | 1,131.53 mi (1,821.02 km) |
| Trier to Odivelas | 1,085.18 mi (1,746.43 km) |
| Trier to Oeiras | 1,095.60 mi (1,763.20 km) |
| Trier to Olhao | 1,137.14 mi (1,830.04 km) |
| Trier to Oliveira de Azemeis | 955.66 mi (1,537.99 km) |
| Trier to Oliveira de Frades | 951.07 mi (1,530.60 km) |
