| Avon Lake to Mangualde | 3,742.11 mi (6,022.34 km) |
| Avon Lake to Marco de Canavezes | 3,705.87 mi (5,964.02 km) |
| Avon Lake to Marinha Grande | 3,714.13 mi (5,977.32 km) |
| Avon Lake to Massama | 3,729.70 mi (6,002.36 km) |
| Avon Lake to Matosinhos | 3,680.29 mi (5,922.85 km) |
| Avon Lake to Mealhada | 3,716.86 mi (5,981.71 km) |
| Avon Lake to Melgaco | 3,671.85 mi (5,909.27 km) |
| Avon Lake to Melres | 3,697.86 mi (5,951.13 km) |
| Avon Lake to Mira | 3,702.02 mi (5,957.82 km) |
| Avon Lake to Miranda do Corvo | 3,731.29 mi (6,004.92 km) |
| Avon Lake to Mirandela | 3,741.31 mi (6,021.06 km) |
| Avon Lake to Mogadouro | 3,767.55 mi (6,063.29 km) |
| Avon Lake to Moimenta da Beira | 3,737.15 mi (6,014.36 km) |
| Avon Lake to Moita | 3,747.04 mi (6,030.28 km) |
| Avon Lake to Moncao | 3,663.33 mi (5,895.56 km) |
