| Ianca to Sestao | 1,505.49 mi (2,422.85 km) |
| Ianca to Sevilla | 1,808.78 mi (2,910.95 km) |
| Ianca to Sevilla La Nueva | 1,621.62 mi (2,609.74 km) |
| Ianca to Silla | 1,472.69 mi (2,370.07 km) |
| Ianca to Silleda | 1,770.63 mi (2,849.55 km) |
| Ianca to Sitges | 1,315.16 mi (2,116.55 km) |
| Ianca to Socuellamos | 1,590.44 mi (2,559.56 km) |
| Ianca to Soller | 1,310.47 mi (2,109.00 km) |
| Ianca to Solsona | 1,311.66 mi (2,110.92 km) |
| Ianca to Son Servera | 1,282.87 mi (2,064.58 km) |
| Ianca to Sonseca | 1,635.22 mi (2,631.63 km) |
| Ianca to Sopelana | 1,502.92 mi (2,418.71 km) |
| Ianca to Soria | 1,510.88 mi (2,431.53 km) |
| Ianca to Suances | 1,553.82 mi (2,500.63 km) |
| Ianca to Sueca | 1,472.54 mi (2,369.83 km) |
