| Silver Spring to Oliveira de Frades | 3,554.91 mi (5,721.08 km) |
| Silver Spring to Oliveira do Bairro | 3,544.72 mi (5,704.68 km) |
| Silver Spring to Oliveira do Hospital | 3,579.88 mi (5,761.25 km) |
| Silver Spring to Ourem | 3,564.28 mi (5,736.16 km) |
| Silver Spring to Ovar | 3,529.21 mi (5,679.71 km) |
| Silver Spring to Pacos de Ferreira | 3,530.29 mi (5,681.46 km) |
| Silver Spring to Palmela | 3,577.13 mi (5,756.83 km) |
| Silver Spring to Paredes | 3,535.21 mi (5,689.37 km) |
| Silver Spring to Paredes de Coura | 3,506.27 mi (5,642.80 km) |
| Silver Spring to Penacova | 3,561.71 mi (5,732.02 km) |
| Silver Spring to Penafiel | 3,537.44 mi (5,692.96 km) |
| Silver Spring to Peniche | 3,532.91 mi (5,685.67 km) |
| Silver Spring to Peso da Regua | 3,562.99 mi (5,734.08 km) |
| Silver Spring to Pinhal Novo | 3,574.67 mi (5,752.88 km) |
| Silver Spring to Pinhel | 3,607.25 mi (5,805.30 km) |
