| Duncan to Solofra | 5,704.28 mi (9,180.15 km) |
| Duncan to Somma Lombardo | 5,254.59 mi (8,456.44 km) |
| Duncan to Somma Vesuviana | 5,685.97 mi (9,150.69 km) |
| Duncan to Sommacampagna | 5,350.05 mi (8,610.07 km) |
| Duncan to Sona | 5,348.02 mi (8,606.80 km) |
| Duncan to Sondrio | 5,280.44 mi (8,498.04 km) |
| Duncan to Sora | 5,616.03 mi (9,038.12 km) |
| Duncan to Sorbolo | 5,357.36 mi (8,621.84 km) |
| Duncan to Soresina | 5,316.05 mi (8,555.35 km) |
| Duncan to Sorisole | 5,289.79 mi (8,513.09 km) |
| Duncan to Sorrento | 5,694.24 mi (9,163.99 km) |
| Duncan to Sorso | 5,447.99 mi (8,767.69 km) |
| Duncan to Sortino | 5,875.38 mi (9,455.52 km) |
| Duncan to Soverato Marina | 5,869.50 mi (9,446.05 km) |
| Duncan to Sovicille | 5,453.66 mi (8,776.82 km) |
