| Maidenhead to Montalegre | 748.51 mi (1,204.61 km) |
| Maidenhead to Montemor-o-Novo | 960.42 mi (1,545.64 km) |
| Maidenhead to Montemor-o-Velho | 872.00 mi (1,403.34 km) |
| Maidenhead to Montijo | 971.22 mi (1,563.02 km) |
| Maidenhead to Mortagua | 845.80 mi (1,361.18 km) |
| Maidenhead to Moura | 981.08 mi (1,578.90 km) |
| Maidenhead to Murtosa | 835.09 mi (1,343.95 km) |
| Maidenhead to Nazare | 915.99 mi (1,474.15 km) |
| Maidenhead to Nelas | 832.87 mi (1,340.37 km) |
| Maidenhead to Obidos | 933.27 mi (1,501.96 km) |
| Maidenhead to Odemira | 1,037.45 mi (1,669.61 km) |
| Maidenhead to Odivelas | 969.95 mi (1,560.98 km) |
| Maidenhead to Oeiras | 979.58 mi (1,576.49 km) |
| Maidenhead to Olhao | 1,060.50 mi (1,706.71 km) |
| Maidenhead to Oliveira de Azemeis | 824.98 mi (1,327.68 km) |
