| Duffel to Siran | 1,812.27 mi (2,916.56 km) |
| Duffel to Sirnak | 2,066.92 mi (3,326.38 km) |
| Duffel to Sirvan | 2,024.99 mi (3,258.91 km) |
| Duffel to Sivas | 1,741.11 mi (2,802.04 km) |
| Duffel to Sivasli | 1,498.69 mi (2,411.91 km) |
| Duffel to Siverek | 1,924.24 mi (3,096.77 km) |
| Duffel to Sivrice | 1,893.49 mi (3,047.27 km) |
| Duffel to Sivrihisar | 1,527.61 mi (2,458.45 km) |
| Duffel to Sogut | 1,447.32 mi (2,329.23 km) |
| Duffel to Sogutlu | 1,420.84 mi (2,286.63 km) |
| Duffel to Soke | 1,447.76 mi (2,329.95 km) |
| Duffel to Solhan | 1,944.98 mi (3,130.15 km) |
| Duffel to Soma | 1,384.46 mi (2,228.07 km) |
| Duffel to Sorgun | 1,661.82 mi (2,674.45 km) |
| Duffel to Suhut | 1,530.32 mi (2,462.81 km) |
