| Clemson to Mangualde | 4,000.51 mi (6,438.20 km) |
| Clemson to Marco de Canavezes | 3,967.72 mi (6,385.43 km) |
| Clemson to Marinha Grande | 3,962.92 mi (6,377.71 km) |
| Clemson to Massama | 3,969.81 mi (6,388.79 km) |
| Clemson to Matosinhos | 3,940.78 mi (6,342.08 km) |
| Clemson to Mealhada | 3,971.81 mi (6,392.02 km) |
| Clemson to Melgaco | 3,940.56 mi (6,341.71 km) |
| Clemson to Melres | 3,958.20 mi (6,370.10 km) |
| Clemson to Mira | 3,956.63 mi (6,367.58 km) |
| Clemson to Miranda do Corvo | 3,984.35 mi (6,412.20 km) |
| Clemson to Mirandela | 4,007.84 mi (6,449.99 km) |
| Clemson to Mogadouro | 4,034.08 mi (6,492.23 km) |
| Clemson to Moimenta da Beira | 3,998.78 mi (6,435.42 km) |
| Clemson to Moita | 3,987.12 mi (6,416.65 km) |
| Clemson to Moncao | 3,931.20 mi (6,326.66 km) |
