| Gretna to Oliveira de Frades | 4,510.32 mi (7,258.66 km) |
| Gretna to Oliveira do Bairro | 4,499.15 mi (7,240.68 km) |
| Gretna to Oliveira do Hospital | 4,534.39 mi (7,297.40 km) |
| Gretna to Ourem | 4,515.55 mi (7,267.08 km) |
| Gretna to Ovar | 4,484.69 mi (7,217.41 km) |
| Gretna to Pacos de Ferreira | 4,487.28 mi (7,221.58 km) |
| Gretna to Palmela | 4,523.77 mi (7,280.30 km) |
| Gretna to Paredes | 4,492.05 mi (7,229.25 km) |
| Gretna to Paredes de Coura | 4,465.10 mi (7,185.88 km) |
| Gretna to Penacova | 4,515.50 mi (7,267.00 km) |
| Gretna to Penafiel | 4,494.34 mi (7,232.94 km) |
| Gretna to Peniche | 4,482.13 mi (7,213.29 km) |
| Gretna to Peso da Regua | 4,520.21 mi (7,274.57 km) |
| Gretna to Pinhal Novo | 4,521.56 mi (7,276.75 km) |
| Gretna to Pinhel | 4,563.90 mi (7,344.89 km) |
