| Greenock to Sesena | 1,095.96 mi (1,763.77 km) |
| Greenock to Sestao | 876.75 mi (1,411.00 km) |
| Greenock to Sevilla | 1,293.99 mi (2,082.48 km) |
| Greenock to Sevilla La Nueva | 1,078.55 mi (1,735.75 km) |
| Greenock to Silla | 1,163.34 mi (1,872.21 km) |
| Greenock to Silleda | 928.41 mi (1,494.14 km) |
| Greenock to Sitges | 1,059.01 mi (1,704.31 km) |
| Greenock to Socuellamos | 1,154.40 mi (1,857.83 km) |
| Greenock to Soller | 1,168.85 mi (1,881.09 km) |
| Greenock to Solsona | 1,004.44 mi (1,616.50 km) |
| Greenock to Son Servera | 1,187.68 mi (1,911.38 km) |
| Greenock to Sonseca | 1,123.38 mi (1,807.91 km) |
| Greenock to Sopelana | 871.99 mi (1,403.34 km) |
| Greenock to Soria | 985.38 mi (1,585.82 km) |
| Greenock to Suances | 865.40 mi (1,392.72 km) |
