| Hilton Head Island to Oliveira de Frades | 3,961.69 mi (6,375.72 km) |
| Hilton Head Island to Oliveira do Bairro | 3,949.66 mi (6,356.37 km) |
| Hilton Head Island to Oliveira do Hospital | 3,984.91 mi (6,413.09 km) |
| Hilton Head Island to Ourem | 3,963.45 mi (6,378.56 km) |
| Hilton Head Island to Ovar | 3,936.19 mi (6,334.68 km) |
| Hilton Head Island to Pacos de Ferreira | 3,940.22 mi (6,341.17 km) |
| Hilton Head Island to Palmela | 3,968.46 mi (6,386.62 km) |
| Hilton Head Island to Paredes | 3,944.82 mi (6,348.58 km) |
| Hilton Head Island to Paredes de Coura | 3,920.04 mi (6,308.69 km) |
| Hilton Head Island to Penacova | 3,965.44 mi (6,381.75 km) |
| Hilton Head Island to Penafiel | 3,947.17 mi (6,352.36 km) |
| Hilton Head Island to Peniche | 3,928.62 mi (6,322.50 km) |
| Hilton Head Island to Peso da Regua | 3,973.30 mi (6,394.41 km) |
| Hilton Head Island to Pinhal Novo | 3,966.41 mi (6,383.33 km) |
| Hilton Head Island to Pinhel | 4,016.34 mi (6,463.67 km) |
