| Boom to Santander | 650.29 mi (1,046.54 km) |
| Boom to Santany | 812.61 mi (1,307.77 km) |
| Boom to Santiago de Compostela | 829.57 mi (1,335.06 km) |
| Boom to Santiago del Teide | 1,920.81 mi (3,091.25 km) |
| Boom to Santiponce | 1,072.09 mi (1,725.36 km) |
| Boom to Santomera | 937.71 mi (1,509.10 km) |
| Boom to Santona | 642.16 mi (1,033.46 km) |
| Boom to Santurce-Antiguo | 637.67 mi (1,026.23 km) |
| Boom to Sarria | 796.85 mi (1,282.40 km) |
| Boom to Sauzal | 1,898.51 mi (3,055.36 km) |
| Boom to Sedavi | 837.41 mi (1,347.69 km) |
| Boom to Segorbe | 810.45 mi (1,304.29 km) |
| Boom to Segovia | 808.80 mi (1,301.64 km) |
| Boom to Senmanat | 663.14 mi (1,067.23 km) |
| Boom to Sesena | 851.76 mi (1,370.77 km) |
