| Castel Gandolfo to Oliveira do Bairro | 1,101.26 mi (1,772.30 km) |
| Castel Gandolfo to Oliveira do Hospital | 1,070.61 mi (1,722.98 km) |
| Castel Gandolfo to Ourem | 1,118.01 mi (1,799.26 km) |
| Castel Gandolfo to Ovar | 1,103.60 mi (1,776.07 km) |
| Castel Gandolfo to Pacos de Ferreira | 1,087.06 mi (1,749.46 km) |
| Castel Gandolfo to Palmela | 1,155.89 mi (1,860.23 km) |
| Castel Gandolfo to Paredes | 1,084.35 mi (1,745.09 km) |
| Castel Gandolfo to Paredes de Coura | 1,089.44 mi (1,753.28 km) |
| Castel Gandolfo to Penacova | 1,093.57 mi (1,759.92 km) |
| Castel Gandolfo to Penafiel | 1,081.75 mi (1,740.91 km) |
| Castel Gandolfo to Peniche | 1,164.53 mi (1,874.14 km) |
| Castel Gandolfo to Peso da Regua | 1,056.11 mi (1,699.65 km) |
| Castel Gandolfo to Pinhal Novo | 1,155.26 mi (1,859.22 km) |
| Castel Gandolfo to Pinhel | 1,024.00 mi (1,647.97 km) |
| Castel Gandolfo to Pombal | 1,116.77 mi (1,797.26 km) |
