| Galveston to Oliveira de Frades | 4,774.52 mi (7,683.85 km) |
| Galveston to Oliveira do Bairro | 4,764.01 mi (7,666.94 km) |
| Galveston to Oliveira do Hospital | 4,799.21 mi (7,723.58 km) |
| Galveston to Ourem | 4,782.40 mi (7,696.53 km) |
| Galveston to Ovar | 4,748.83 mi (7,642.50 km) |
| Galveston to Pacos de Ferreira | 4,750.34 mi (7,644.93 km) |
| Galveston to Palmela | 4,793.16 mi (7,713.84 km) |
| Galveston to Paredes | 4,755.22 mi (7,652.78 km) |
| Galveston to Paredes de Coura | 4,726.71 mi (7,606.91 km) |
| Galveston to Penacova | 4,780.79 mi (7,693.94 km) |
| Galveston to Penafiel | 4,757.46 mi (7,656.40 km) |
| Galveston to Peniche | 4,750.13 mi (7,644.60 km) |
| Galveston to Peso da Regua | 4,783.10 mi (7,697.66 km) |
| Galveston to Pinhal Novo | 4,790.82 mi (7,710.09 km) |
| Galveston to Pinhel | 4,827.22 mi (7,768.66 km) |
