| Smolyan to Santander | 1,450.21 mi (2,333.89 km) |
| Smolyan to Santany | 1,141.25 mi (1,836.67 km) |
| Smolyan to Santiago de Compostela | 1,692.06 mi (2,723.11 km) |
| Smolyan to Santiago del Teide | 2,495.70 mi (4,016.45 km) |
| Smolyan to Santiponce | 1,654.66 mi (2,662.92 km) |
| Smolyan to Santomera | 1,382.55 mi (2,225.00 km) |
| Smolyan to Santona | 1,432.96 mi (2,306.12 km) |
| Smolyan to Santurce-Antiguo | 1,412.25 mi (2,272.80 km) |
| Smolyan to Sarria | 1,636.45 mi (2,633.62 km) |
| Smolyan to Sauzal | 2,469.45 mi (3,974.20 km) |
| Smolyan to Sedavi | 1,321.52 mi (2,126.78 km) |
| Smolyan to Segorbe | 1,319.84 mi (2,124.07 km) |
| Smolyan to Segovia | 1,490.34 mi (2,398.46 km) |
| Smolyan to Senmanat | 1,162.57 mi (1,870.98 km) |
| Smolyan to Sesena | 1,481.16 mi (2,383.69 km) |
