| Royston to Montalegre | 794.83 mi (1,279.15 km) |
| Royston to Montemor-o-Novo | 1,006.06 mi (1,619.09 km) |
| Royston to Montemor-o-Velho | 918.27 mi (1,477.82 km) |
| Royston to Montijo | 1,017.23 mi (1,637.07 km) |
| Royston to Mortagua | 891.94 mi (1,435.43 km) |
| Royston to Moura | 1,026.08 mi (1,651.32 km) |
| Royston to Murtosa | 881.49 mi (1,418.62 km) |
| Royston to Nazare | 962.30 mi (1,548.67 km) |
| Royston to Nelas | 878.83 mi (1,414.34 km) |
| Royston to Obidos | 979.56 mi (1,576.45 km) |
| Royston to Odemira | 1,083.05 mi (1,743.00 km) |
| Royston to Odivelas | 1,016.11 mi (1,635.27 km) |
| Royston to Oeiras | 1,025.78 mi (1,650.84 km) |
| Royston to Olhao | 1,105.47 mi (1,779.08 km) |
| Royston to Oliveira de Azemeis | 871.34 mi (1,402.29 km) |
