| Cities | Distance |
|---|---|
| Boom to Sestao | 638.18 mi (1,027.05 km) |
| Boom to Sevilla | 1,083.09 mi (1,743.07 km) |
| Boom to Sevilla La Nueva | 843.87 mi (1,358.07 km) |
| Boom to Silla | 842.12 mi (1,355.26 km) |
| Boom to Silleda | 828.19 mi (1,332.84 km) |
| Boom to Sitges | 691.37 mi (1,112.66 km) |
| Boom to Socuellamos | 885.08 mi (1,424.40 km) |
| Boom to Soller | 786.01 mi (1,264.96 km) |
| Boom to Solsona | 642.28 mi (1,033.65 km) |
| Boom to Son Servera | 793.47 mi (1,276.96 km) |
| Boom to Sonseca | 882.67 mi (1,420.52 km) |
| Boom to Sopelana | 633.30 mi (1,019.20 km) |
| Boom to Soria | 720.56 mi (1,159.63 km) |
| Boom to Suances | 658.76 mi (1,060.17 km) |
| Boom to Sueca | 851.50 mi (1,370.35 km) |