| Clemson to Oliveira de Frades | 3,977.06 mi (6,400.46 km) |
| Clemson to Oliveira do Bairro | 3,966.18 mi (6,382.96 km) |
| Clemson to Oliveira do Hospital | 4,001.41 mi (6,439.65 km) |
| Clemson to Ourem | 3,983.60 mi (6,410.98 km) |
| Clemson to Ovar | 3,951.40 mi (6,359.16 km) |
| Clemson to Pacos de Ferreira | 3,953.55 mi (6,362.62 km) |
| Clemson to Palmela | 3,993.38 mi (6,426.72 km) |
| Clemson to Paredes | 3,958.36 mi (6,370.36 km) |
| Clemson to Paredes de Coura | 3,930.84 mi (6,326.08 km) |
| Clemson to Penacova | 3,982.74 mi (6,409.60 km) |
| Clemson to Penafiel | 3,960.63 mi (6,374.02 km) |
| Clemson to Peniche | 3,950.84 mi (6,358.26 km) |
| Clemson to Peso da Regua | 3,986.42 mi (6,415.52 km) |
| Clemson to Pinhal Novo | 3,991.08 mi (6,423.03 km) |
| Clemson to Pinhel | 4,030.29 mi (6,486.12 km) |
