| Del Rio to Mangualde | 5,081.70 mi (8,178.20 km) |
| Del Rio to Marco de Canavezes | 5,046.54 mi (8,121.62 km) |
| Del Rio to Marinha Grande | 5,050.08 mi (8,127.31 km) |
| Del Rio to Massama | 5,061.90 mi (8,146.35 km) |
| Del Rio to Matosinhos | 5,020.48 mi (8,079.68 km) |
| Del Rio to Mealhada | 5,055.19 mi (8,135.54 km) |
| Del Rio to Melgaco | 5,014.48 mi (8,070.03 km) |
| Del Rio to Melres | 5,038.02 mi (8,107.91 km) |
| Del Rio to Mira | 5,040.19 mi (8,111.41 km) |
| Del Rio to Miranda do Corvo | 5,068.94 mi (8,157.67 km) |
| Del Rio to Mirandela | 5,083.44 mi (8,181.01 km) |
| Del Rio to Mogadouro | 5,109.72 mi (8,223.30 km) |
| Del Rio to Moimenta da Beira | 5,077.79 mi (8,171.92 km) |
| Del Rio to Moita | 5,079.27 mi (8,174.29 km) |
| Del Rio to Moncao | 5,005.73 mi (8,055.94 km) |
