| Middle River to Piedras Blancas | 3,548.68 mi (5,711.05 km) |
| Middle River to Piera | 3,965.25 mi (6,381.45 km) |
| Middle River to Pilar de la Horadada | 3,957.62 mi (6,369.17 km) |
| Middle River to Pilas | 3,703.91 mi (5,960.87 km) |
| Middle River to Pinos Puente | 3,831.57 mi (6,166.31 km) |
| Middle River to Pinto | 3,745.14 mi (6,027.22 km) |
| Middle River to Pizarra | 3,799.38 mi (6,114.50 km) |
| Middle River to Plasencia | 3,636.04 mi (5,851.64 km) |
| Middle River to Pola de Laviana | 3,576.45 mi (5,755.74 km) |
| Middle River to Pola de Lena | 3,565.62 mi (5,738.32 km) |
| Middle River to Pola de Siero | 3,568.34 mi (5,742.69 km) |
| Middle River to Pollensa | 4,075.69 mi (6,559.19 km) |
| Middle River to Ponferrada | 3,545.24 mi (5,705.51 km) |
| Middle River to Pontevedra | 3,450.98 mi (5,553.82 km) |
| Middle River to Portugalete | 3,692.51 mi (5,942.52 km) |
