| Sleaford to Sinop | 1,800.60 mi (2,897.78 km) |
| Sleaford to Siran | 2,041.76 mi (3,285.90 km) |
| Sleaford to Sirnak | 2,297.79 mi (3,697.94 km) |
| Sleaford to Sirvan | 2,255.29 mi (3,629.54 km) |
| Sleaford to Sivas | 1,974.97 mi (3,178.40 km) |
| Sleaford to Sivasli | 1,743.49 mi (2,805.88 km) |
| Sleaford to Siverek | 2,159.20 mi (3,474.90 km) |
| Sleaford to Sivrice | 2,126.97 mi (3,423.03 km) |
| Sleaford to Sivrihisar | 1,769.33 mi (2,847.46 km) |
| Sleaford to Sogut | 1,689.62 mi (2,719.18 km) |
| Sleaford to Sogutlu | 1,661.18 mi (2,673.41 km) |
| Sleaford to Soke | 1,694.40 mi (2,726.87 km) |
| Sleaford to Solhan | 2,174.61 mi (3,499.69 km) |
| Sleaford to Soma | 1,630.09 mi (2,623.38 km) |
| Sleaford to Sorgun | 1,898.18 mi (3,054.82 km) |
