| Watford to Montalegre | 763.35 mi (1,228.50 km) |
| Watford to Montemor-o-Novo | 974.68 mi (1,568.59 km) |
| Watford to Montemor-o-Velho | 886.80 mi (1,427.17 km) |
| Watford to Montijo | 985.78 mi (1,586.46 km) |
| Watford to Mortagua | 860.47 mi (1,384.80 km) |
| Watford to Moura | 994.87 mi (1,601.10 km) |
| Watford to Murtosa | 850.01 mi (1,367.96 km) |
| Watford to Nazare | 930.82 mi (1,498.02 km) |
| Watford to Nelas | 847.39 mi (1,363.74 km) |
| Watford to Obidos | 948.09 mi (1,525.80 km) |
| Watford to Odemira | 1,051.68 mi (1,692.51 km) |
| Watford to Odivelas | 984.64 mi (1,584.63 km) |
| Watford to Oeiras | 994.31 mi (1,600.19 km) |
| Watford to Olhao | 1,074.27 mi (1,728.87 km) |
| Watford to Oliveira de Azemeis | 839.87 mi (1,351.63 km) |
