| Ustron to Santander | 1,152.02 mi (1,854.00 km) |
| Ustron to Santany | 1,049.44 mi (1,688.90 km) |
| Ustron to Santiago de Compostela | 1,379.53 mi (2,220.14 km) |
| Ustron to Santiago del Teide | 2,382.12 mi (3,833.66 km) |
| Ustron to Santiponce | 1,494.82 mi (2,405.68 km) |
| Ustron to Santomera | 1,268.58 mi (2,041.59 km) |
| Ustron to Santona | 1,137.68 mi (1,830.91 km) |
| Ustron to Santurce-Antiguo | 1,123.13 mi (1,807.50 km) |
| Ustron to Sarria | 1,333.21 mi (2,145.60 km) |
| Ustron to Sauzal | 2,357.31 mi (3,793.72 km) |
| Ustron to Sedavi | 1,176.82 mi (1,893.91 km) |
| Ustron to Segorbe | 1,160.92 mi (1,868.32 km) |
| Ustron to Segovia | 1,260.72 mi (2,028.94 km) |
| Ustron to Senmanat | 977.56 mi (1,573.23 km) |
| Ustron to Sesena | 1,278.85 mi (2,058.10 km) |
