| Merriam to Oliveira de Frades | 4,385.96 mi (7,058.51 km) |
| Merriam to Oliveira do Bairro | 4,378.44 mi (7,046.42 km) |
| Merriam to Oliveira do Hospital | 4,412.92 mi (7,101.91 km) |
| Merriam to Ourem | 4,405.36 mi (7,089.74 km) |
| Merriam to Ovar | 4,360.38 mi (7,017.35 km) |
| Merriam to Pacos de Ferreira | 4,357.29 mi (7,012.37 km) |
| Merriam to Palmela | 4,427.78 mi (7,125.82 km) |
| Merriam to Paredes | 4,362.58 mi (7,020.89 km) |
| Merriam to Paredes de Coura | 4,328.07 mi (6,965.36 km) |
| Merriam to Penacova | 4,396.81 mi (7,075.99 km) |
| Merriam to Penafiel | 4,364.60 mi (7,024.14 km) |
| Merriam to Peniche | 4,378.85 mi (7,047.08 km) |
| Merriam to Peso da Regua | 4,388.90 mi (7,063.25 km) |
| Merriam to Pinhal Novo | 4,424.87 mi (7,121.14 km) |
| Merriam to Pinhel | 4,434.17 mi (7,136.11 km) |
