| Riom to Montemor-o-Novo | 764.15 mi (1,229.79 km) |
| Riom to Montemor-o-Velho | 714.04 mi (1,149.14 km) |
| Riom to Montijo | 789.19 mi (1,270.07 km) |
| Riom to Mortagua | 684.02 mi (1,100.82 km) |
| Riom to Moura | 761.31 mi (1,225.21 km) |
| Riom to Murtosa | 688.75 mi (1,108.43 km) |
| Riom to Nazare | 754.28 mi (1,213.90 km) |
| Riom to Nelas | 664.51 mi (1,069.43 km) |
| Riom to Obidos | 768.67 mi (1,237.06 km) |
| Riom to Odemira | 832.86 mi (1,340.36 km) |
| Riom to Odivelas | 795.30 mi (1,279.91 km) |
| Riom to Oeiras | 805.74 mi (1,296.71 km) |
| Riom to Olhao | 833.36 mi (1,341.17 km) |
| Riom to Oliveira de Azemeis | 677.73 mi (1,090.71 km) |
| Riom to Oliveira de Frades | 670.23 mi (1,078.64 km) |
