| Port Lavaca to Mangualde | 4,908.38 mi (7,899.28 km) |
| Port Lavaca to Marco de Canavezes | 4,874.73 mi (7,845.12 km) |
| Port Lavaca to Marinha Grande | 4,872.69 mi (7,841.84 km) |
| Port Lavaca to Massama | 4,880.95 mi (7,855.12 km) |
| Port Lavaca to Matosinhos | 4,848.09 mi (7,802.24 km) |
| Port Lavaca to Mealhada | 4,880.40 mi (7,854.25 km) |
| Port Lavaca to Melgaco | 4,845.71 mi (7,798.42 km) |
| Port Lavaca to Melres | 4,865.56 mi (7,830.36 km) |
| Port Lavaca to Mira | 4,865.27 mi (7,829.89 km) |
| Port Lavaca to Miranda do Corvo | 4,893.34 mi (7,875.08 km) |
| Port Lavaca to Mirandela | 4,913.70 mi (7,907.83 km) |
| Port Lavaca to Mogadouro | 4,939.97 mi (7,950.12 km) |
| Port Lavaca to Moimenta da Beira | 4,905.89 mi (7,895.26 km) |
| Port Lavaca to Moita | 4,898.28 mi (7,883.02 km) |
| Port Lavaca to Moncao | 4,836.58 mi (7,783.72 km) |
