| Clemson to Montalegre | 3,970.30 mi (6,389.58 km) |
| Clemson to Montemor-o-Novo | 4,025.72 mi (6,478.78 km) |
| Clemson to Montemor-o-Velho | 3,965.41 mi (6,381.71 km) |
| Clemson to Montijo | 3,990.50 mi (6,422.09 km) |
| Clemson to Mortagua | 3,981.33 mi (6,407.33 km) |
| Clemson to Moura | 4,077.45 mi (6,562.03 km) |
| Clemson to Murtosa | 3,954.52 mi (6,364.18 km) |
| Clemson to Nazare | 3,959.86 mi (6,372.77 km) |
| Clemson to Nelas | 3,998.24 mi (6,434.54 km) |
| Clemson to Obidos | 3,961.11 mi (6,374.79 km) |
| Clemson to Odemira | 4,031.59 mi (6,488.22 km) |
| Clemson to Odivelas | 3,973.78 mi (6,395.18 km) |
| Clemson to Oeiras | 3,969.49 mi (6,388.28 km) |
| Clemson to Olhao | 4,086.39 mi (6,576.40 km) |
| Clemson to Oliveira de Azemeis | 3,959.81 mi (6,372.70 km) |
