| Mercer Island to Penne | 5,665.88 mi (9,118.35 km) |
| Mercer Island to Pergine Valsugana | 5,383.00 mi (8,663.09 km) |
| Mercer Island to Perugia | 5,588.59 mi (8,993.97 km) |
| Mercer Island to Pesaro | 5,552.38 mi (8,935.70 km) |
| Mercer Island to Pescantina | 5,408.99 mi (8,704.93 km) |
| Mercer Island to Pescara | 5,672.14 mi (9,128.44 km) |
| Mercer Island to Peschiera del Garda | 5,407.31 mi (8,702.22 km) |
| Mercer Island to Pescia | 5,499.08 mi (8,849.92 km) |
| Mercer Island to Petilia Policastro | 5,939.25 mi (9,558.30 km) |
| Mercer Island to Piacenza | 5,405.96 mi (8,700.05 km) |
| Mercer Island to Pianella | 5,672.13 mi (9,128.41 km) |
| Mercer Island to Pianezza | 5,347.74 mi (8,606.35 km) |
| Mercer Island to Pianiga | 5,438.03 mi (8,751.66 km) |
| Mercer Island to Piano di Sorrento | 5,788.73 mi (9,316.06 km) |
| Mercer Island to Pianoro | 5,486.21 mi (8,829.21 km) |
