| Rock Hill to Mangualde | 3,903.55 mi (6,282.16 km) |
| Rock Hill to Marco de Canavezes | 3,871.08 mi (6,229.91 km) |
| Rock Hill to Marinha Grande | 3,865.18 mi (6,220.41 km) |
| Rock Hill to Massama | 3,871.40 mi (6,230.41 km) |
| Rock Hill to Matosinhos | 3,844.04 mi (6,186.39 km) |
| Rock Hill to Mealhada | 3,874.57 mi (6,235.52 km) |
| Rock Hill to Melgaco | 3,844.57 mi (6,187.24 km) |
| Rock Hill to Melres | 3,861.43 mi (6,214.37 km) |
| Rock Hill to Mira | 3,859.37 mi (6,211.06 km) |
| Rock Hill to Miranda do Corvo | 3,886.95 mi (6,255.44 km) |
| Rock Hill to Mirandela | 3,911.60 mi (6,295.11 km) |
| Rock Hill to Mogadouro | 3,937.82 mi (6,337.31 km) |
| Rock Hill to Moimenta da Beira | 3,902.10 mi (6,279.83 km) |
| Rock Hill to Moita | 3,888.70 mi (6,258.25 km) |
| Rock Hill to Moncao | 3,835.15 mi (6,172.07 km) |
