| Port Neches to Mangualde | 4,722.49 mi (7,600.12 km) |
| Port Neches to Marco de Canavezes | 4,689.00 mi (7,546.22 km) |
| Port Neches to Marinha Grande | 4,686.45 mi (7,542.11 km) |
| Port Neches to Massama | 4,694.44 mi (7,554.97 km) |
| Port Neches to Matosinhos | 4,662.30 mi (7,503.25 km) |
| Port Neches to Mealhada | 4,694.38 mi (7,554.87 km) |
| Port Neches to Melgaco | 4,660.33 mi (7,500.07 km) |
| Port Neches to Melres | 4,679.76 mi (7,531.35 km) |
| Port Neches to Mira | 4,679.23 mi (7,530.50 km) |
| Port Neches to Miranda do Corvo | 4,707.24 mi (7,575.58 km) |
| Port Neches to Mirandela | 4,728.19 mi (7,609.28 km) |
| Port Neches to Mogadouro | 4,754.46 mi (7,651.56 km) |
| Port Neches to Moimenta da Beira | 4,720.14 mi (7,596.33 km) |
| Port Neches to Moita | 4,711.77 mi (7,582.86 km) |
| Port Neches to Moncao | 4,651.15 mi (7,485.31 km) |
