| Constanta to Sestao | 1,570.74 mi (2,527.86 km) |
| Constanta to Sevilla | 1,860.60 mi (2,994.35 km) |
| Constanta to Sevilla La Nueva | 1,679.66 mi (2,703.15 km) |
| Constanta to Silla | 1,524.68 mi (2,453.73 km) |
| Constanta to Silleda | 1,836.97 mi (2,956.32 km) |
| Constanta to Sitges | 1,371.05 mi (2,206.50 km) |
| Constanta to Socuellamos | 1,644.55 mi (2,646.65 km) |
| Constanta to Soller | 1,360.42 mi (2,189.38 km) |
| Constanta to Solsona | 1,370.32 mi (2,205.31 km) |
| Constanta to Son Servera | 1,331.52 mi (2,142.87 km) |
| Constanta to Sonseca | 1,691.48 mi (2,722.17 km) |
| Constanta to Sopelana | 1,568.34 mi (2,524.01 km) |
| Constanta to Soria | 1,571.65 mi (2,529.32 km) |
| Constanta to Suances | 1,619.88 mi (2,606.95 km) |
| Constanta to Sueca | 1,523.93 mi (2,452.53 km) |
