| Mercer Island to Spello | 5,602.98 mi (9,017.13 km) |
| Mercer Island to Spilamberto | 5,469.44 mi (8,802.22 km) |
| Mercer Island to Spilimbergo | 5,418.36 mi (8,720.00 km) |
| Mercer Island to Spinea | 5,439.58 mi (8,754.15 km) |
| Mercer Island to Spoleto | 5,617.36 mi (9,040.27 km) |
| Mercer Island to Spoltore | 5,670.93 mi (9,126.49 km) |
| Mercer Island to Spresiano | 5,424.24 mi (8,729.46 km) |
| Mercer Island to Squinzano | 5,886.95 mi (9,474.14 km) |
| Mercer Island to Statte | 5,859.16 mi (9,429.41 km) |
| Mercer Island to Stezzano | 5,369.16 mi (8,640.83 km) |
| Mercer Island to Strada | 5,533.77 mi (8,905.74 km) |
| Mercer Island to Stradella | 5,393.94 mi (8,680.71 km) |
| Mercer Island to Striano | 5,781.31 mi (9,304.11 km) |
| Mercer Island to Subiaco | 5,677.41 mi (9,136.91 km) |
| Mercer Island to Sulmona | 5,690.60 mi (9,158.13 km) |
