| Seal Beach to Mangualde | 5,652.29 mi (9,096.48 km) |
| Seal Beach to Marco de Canavezes | 5,611.69 mi (9,031.14 km) |
| Seal Beach to Marinha Grande | 5,639.46 mi (9,075.84 km) |
| Seal Beach to Massama | 5,666.63 mi (9,119.57 km) |
| Seal Beach to Matosinhos | 5,589.02 mi (8,994.66 km) |
| Seal Beach to Mealhada | 5,633.06 mi (9,065.54 km) |
| Seal Beach to Melgaco | 5,567.54 mi (8,960.09 km) |
| Seal Beach to Melres | 5,606.31 mi (9,022.49 km) |
| Seal Beach to Mira | 5,619.14 mi (9,043.13 km) |
| Seal Beach to Miranda do Corvo | 5,649.90 mi (9,092.64 km) |
| Seal Beach to Mirandela | 5,638.43 mi (9,074.18 km) |
| Seal Beach to Mogadouro | 5,663.84 mi (9,115.07 km) |
| Seal Beach to Moimenta da Beira | 5,642.38 mi (9,080.53 km) |
| Seal Beach to Moita | 5,683.60 mi (9,146.87 km) |
| Seal Beach to Moncao | 5,560.69 mi (8,949.06 km) |
