| Rathfarnham to Marco de Canavezes | 841.58 mi (1,354.39 km) |
| Rathfarnham to Marinha Grande | 944.39 mi (1,519.84 km) |
| Rathfarnham to Massama | 1,014.71 mi (1,633.01 km) |
| Rathfarnham to Matosinhos | 844.60 mi (1,359.25 km) |
| Rathfarnham to Mealhada | 898.11 mi (1,445.37 km) |
| Rathfarnham to Melgaco | 778.00 mi (1,252.07 km) |
| Rathfarnham to Melres | 850.87 mi (1,369.34 km) |
| Rathfarnham to Mira | 896.27 mi (1,442.41 km) |
| Rathfarnham to Miranda do Corvo | 917.00 mi (1,475.76 km) |
| Rathfarnham to Mirandela | 817.29 mi (1,315.30 km) |
| Rathfarnham to Mogadouro | 826.98 mi (1,330.89 km) |
| Rathfarnham to Moimenta da Beira | 853.41 mi (1,373.44 km) |
| Rathfarnham to Moita | 1,020.20 mi (1,641.85 km) |
| Rathfarnham to Moncao | 782.20 mi (1,258.82 km) |
| Rathfarnham to Montalegre | 795.95 mi (1,280.96 km) |
