| Duncan to Sereflikochisar | 6,487.05 mi (10,439.91 km) |
| Duncan to Serik | 6,511.93 mi (10,479.94 km) |
| Duncan to Serinhisar | 6,411.68 mi (10,318.60 km) |
| Duncan to Serinyol | 6,716.83 mi (10,809.69 km) |
| Duncan to Seydisehir | 6,511.63 mi (10,479.46 km) |
| Duncan to Seyhan | 6,653.93 mi (10,708.46 km) |
| Duncan to Seyitgazi | 6,363.91 mi (10,241.72 km) |
| Duncan to Siirt | 6,807.61 mi (10,955.80 km) |
| Duncan to Sile | 6,235.95 mi (10,035.78 km) |
| Duncan to Silifke | 6,639.78 mi (10,685.69 km) |
| Duncan to Silivri | 6,194.46 mi (9,969.02 km) |
| Duncan to Silopi | 6,862.46 mi (11,044.07 km) |
| Duncan to Simav | 6,323.28 mi (10,176.33 km) |
| Duncan to Sinanpasa | 6,385.21 mi (10,276.00 km) |
| Duncan to Sindirgi | 6,286.49 mi (10,117.12 km) |
