| Somerset to Montalegre | 3,379.72 mi (5,439.13 km) |
| Somerset to Montemor-o-Novo | 3,445.76 mi (5,545.42 km) |
| Somerset to Montemor-o-Velho | 3,380.74 mi (5,440.78 km) |
| Somerset to Montijo | 3,411.22 mi (5,489.83 km) |
| Somerset to Mortagua | 3,395.35 mi (5,464.29 km) |
| Somerset to Moura | 3,498.42 mi (5,630.16 km) |
| Somerset to Murtosa | 3,367.96 mi (5,420.21 km) |
| Somerset to Nazare | 3,377.51 mi (5,435.57 km) |
| Somerset to Nelas | 3,411.62 mi (5,490.48 km) |
| Somerset to Obidos | 3,379.71 mi (5,439.11 km) |
| Somerset to Odemira | 3,456.08 mi (5,562.03 km) |
| Somerset to Odivelas | 3,394.44 mi (5,462.83 km) |
| Somerset to Oeiras | 3,390.70 mi (5,456.81 km) |
| Somerset to Olhao | 3,511.95 mi (5,651.93 km) |
| Somerset to Oliveira de Azemeis | 3,372.77 mi (5,427.95 km) |
