| Rocky River to Mangualde | 3,735.21 mi (6,011.23 km) |
| Rocky River to Marco de Canavezes | 3,699.01 mi (5,952.98 km) |
| Rocky River to Marinha Grande | 3,707.10 mi (5,966.00 km) |
| Rocky River to Massama | 3,722.56 mi (5,990.88 km) |
| Rocky River to Matosinhos | 3,673.41 mi (5,911.78 km) |
| Rocky River to Mealhada | 3,709.91 mi (5,970.53 km) |
| Rocky River to Melgaco | 3,665.08 mi (5,898.38 km) |
| Rocky River to Melres | 3,690.98 mi (5,940.05 km) |
| Rocky River to Mira | 3,695.06 mi (5,946.62 km) |
| Rocky River to Miranda do Corvo | 3,724.31 mi (5,993.70 km) |
| Rocky River to Mirandela | 3,734.52 mi (6,010.13 km) |
| Rocky River to Mogadouro | 3,760.76 mi (6,052.36 km) |
| Rocky River to Moimenta da Beira | 3,730.29 mi (6,003.32 km) |
| Rocky River to Moita | 3,739.90 mi (6,018.79 km) |
| Rocky River to Moncao | 3,656.55 mi (5,884.65 km) |
