| Tulcea to Sestao | 1,569.23 mi (2,525.43 km) |
| Tulcea to Sevilla | 1,873.42 mi (3,014.98 km) |
| Tulcea to Sevilla La Nueva | 1,686.19 mi (2,713.67 km) |
| Tulcea to Silla | 1,537.33 mi (2,474.10 km) |
| Tulcea to Silleda | 1,834.11 mi (2,951.71 km) |
| Tulcea to Sitges | 1,379.83 mi (2,220.62 km) |
| Tulcea to Socuellamos | 1,655.11 mi (2,663.65 km) |
| Tulcea to Soller | 1,375.01 mi (2,212.87 km) |
| Tulcea to Solsona | 1,376.22 mi (2,214.82 km) |
| Tulcea to Son Servera | 1,347.32 mi (2,168.30 km) |
| Tulcea to Sonseca | 1,699.87 mi (2,735.68 km) |
| Tulcea to Sopelana | 1,566.63 mi (2,521.25 km) |
| Tulcea to Soria | 1,575.26 mi (2,535.13 km) |
| Tulcea to Suances | 1,617.39 mi (2,602.94 km) |
| Tulcea to Sueca | 1,537.16 mi (2,473.82 km) |
