| Duncan to Suhut | 6,407.07 mi (10,311.19 km) |
| Duncan to Sulakyurt | 6,426.91 mi (10,343.11 km) |
| Duncan to Sultanbeyli | 6,234.84 mi (10,034.00 km) |
| Duncan to Sultandagi | 6,430.84 mi (10,349.43 km) |
| Duncan to Sultanhani | 6,525.00 mi (10,500.97 km) |
| Duncan to Sultanhisar | 6,355.46 mi (10,228.12 km) |
| Duncan to Suluova | 6,451.47 mi (10,382.63 km) |
| Duncan to Sumbas | 6,651.60 mi (10,704.71 km) |
| Duncan to Sungurlu | 6,448.08 mi (10,377.18 km) |
| Duncan to Surmene | 6,581.13 mi (10,591.31 km) |
| Duncan to Suruc | 6,754.87 mi (10,870.91 km) |
| Duncan to Susehri | 6,564.09 mi (10,563.89 km) |
| Duncan to Susurluk | 6,251.22 mi (10,060.37 km) |
| Duncan to Susuz | 6,673.84 mi (10,740.50 km) |
| Duncan to Sutculer | 6,477.15 mi (10,423.97 km) |
