| Mercer Island to Sacile | 5,419.09 mi (8,721.18 km) |
| Mercer Island to Sala Consilina | 5,831.80 mi (9,385.37 km) |
| Mercer Island to Salemi | 5,919.58 mi (9,526.64 km) |
| Mercer Island to Salerno | 5,794.32 mi (9,325.06 km) |
| Mercer Island to Salo | 5,393.88 mi (8,680.62 km) |
| Mercer Island to Salsomaggiore Terme | 5,426.92 mi (8,733.78 km) |
| Mercer Island to Saluzzo | 5,373.32 mi (8,647.52 km) |
| Mercer Island to Salzano | 5,436.11 mi (8,748.58 km) |
| Mercer Island to Samarate | 5,349.42 mi (8,609.06 km) |
| Mercer Island to San Benedetto del Tronto | 5,634.63 mi (9,068.06 km) |
| Mercer Island to San Biagio di Callalta | 5,433.16 mi (8,743.83 km) |
| Mercer Island to San Bonifacio | 5,424.09 mi (8,729.23 km) |
| Mercer Island to San Casciano in Val di Pesa | 5,526.10 mi (8,893.41 km) |
| Mercer Island to San Cataldo | 5,970.49 mi (9,608.58 km) |
| Mercer Island to San Cesareo | 5,677.07 mi (9,136.36 km) |
