| Backnang to Siran | 1,569.32 mi (2,525.57 km) |
| Backnang to Sirnak | 1,821.48 mi (2,931.39 km) |
| Backnang to Sirvan | 1,780.38 mi (2,865.25 km) |
| Backnang to Sivas | 1,492.79 mi (2,402.41 km) |
| Backnang to Sivasli | 1,236.86 mi (1,990.54 km) |
| Backnang to Siverek | 1,674.09 mi (2,694.18 km) |
| Backnang to Sivrice | 1,645.24 mi (2,647.76 km) |
| Backnang to Sivrihisar | 1,269.61 mi (2,043.25 km) |
| Backnang to Sogut | 1,188.69 mi (1,913.02 km) |
| Backnang to Sogutlu | 1,164.87 mi (1,874.68 km) |
| Backnang to Soke | 1,183.94 mi (1,905.37 km) |
| Backnang to Solhan | 1,701.44 mi (2,738.20 km) |
| Backnang to Soma | 1,121.69 mi (1,805.18 km) |
| Backnang to Sorgun | 1,410.52 mi (2,270.00 km) |
| Backnang to Suhut | 1,269.41 mi (2,042.92 km) |
