| Sulphur to Mangualde | 4,683.68 mi (7,537.65 km) |
| Sulphur to Marco de Canavezes | 4,650.24 mi (7,483.83 km) |
| Sulphur to Marinha Grande | 4,647.51 mi (7,479.44 km) |
| Sulphur to Massama | 4,655.41 mi (7,492.16 km) |
| Sulphur to Matosinhos | 4,623.52 mi (7,440.83 km) |
| Sulphur to Mealhada | 4,655.52 mi (7,492.33 km) |
| Sulphur to Melgaco | 4,621.67 mi (7,437.86 km) |
| Sulphur to Melres | 4,640.98 mi (7,468.93 km) |
| Sulphur to Mira | 4,640.37 mi (7,467.95 km) |
| Sulphur to Miranda do Corvo | 4,668.36 mi (7,512.99 km) |
| Sulphur to Mirandela | 4,689.49 mi (7,547.00 km) |
| Sulphur to Mogadouro | 4,715.76 mi (7,589.28 km) |
| Sulphur to Moimenta da Beira | 4,681.37 mi (7,533.94 km) |
| Sulphur to Moita | 4,672.74 mi (7,520.04 km) |
| Sulphur to Moncao | 4,612.48 mi (7,423.07 km) |
