| Mercer Island to Piazza Armerina | 5,986.41 mi (9,634.19 km) |
| Mercer Island to Piazzola sul Brenta | 5,427.75 mi (8,735.12 km) |
| Mercer Island to Pietrasanta | 5,484.65 mi (8,826.70 km) |
| Mercer Island to Pieve di Soligo | 5,416.25 mi (8,716.61 km) |
| Mercer Island to Pinerolo | 5,355.02 mi (8,618.07 km) |
| Mercer Island to Pioltello | 5,370.12 mi (8,642.38 km) |
| Mercer Island to Piombino | 5,552.62 mi (8,936.07 km) |
| Mercer Island to Piombino Dese | 5,428.87 mi (8,736.92 km) |
| Mercer Island to Piossasco | 5,352.41 mi (8,613.87 km) |
| Mercer Island to Piove di Sacco | 5,448.37 mi (8,768.31 km) |
| Mercer Island to Pisa | 5,502.85 mi (8,855.99 km) |
| Mercer Island to Pisticci | 5,855.37 mi (9,423.30 km) |
| Mercer Island to Pistoia | 5,502.86 mi (8,855.99 km) |
| Mercer Island to Pizzo | 5,948.16 mi (9,572.64 km) |
| Mercer Island to Podenzano | 5,411.47 mi (8,708.92 km) |
