| Mercer Island to Piedras Blancas | 5,044.10 mi (8,117.70 km) |
| Mercer Island to Piera | 5,393.33 mi (8,679.73 km) |
| Mercer Island to Pilar de la Horadada | 5,521.52 mi (8,886.02 km) |
| Mercer Island to Pilas | 5,370.51 mi (8,643.00 km) |
| Mercer Island to Pinos Puente | 5,459.17 mi (8,785.69 km) |
| Mercer Island to Pinto | 5,296.02 mi (8,523.12 km) |
| Mercer Island to Pizarra | 5,453.90 mi (8,777.20 km) |
| Mercer Island to Plasencia | 5,230.17 mi (8,417.14 km) |
| Mercer Island to Pola de Laviana | 5,074.78 mi (8,167.06 km) |
| Mercer Island to Pola de Lena | 5,070.28 mi (8,159.82 km) |
| Mercer Island to Pola de Siero | 5,063.89 mi (8,149.55 km) |
| Mercer Island to Pollensa | 5,524.60 mi (8,890.98 km) |
| Mercer Island to Ponferrada | 5,078.64 mi (8,173.28 km) |
| Mercer Island to Pontevedra | 5,017.89 mi (8,075.52 km) |
| Mercer Island to Portugalete | 5,149.38 mi (8,287.12 km) |
