| Greenock to Solofra | 1,368.84 mi (2,202.94 km) |
| Greenock to Somma Lombardo | 917.95 mi (1,477.30 km) |
| Greenock to Somma Vesuviana | 1,354.67 mi (2,180.14 km) |
| Greenock to Sommacampagna | 994.91 mi (1,601.15 km) |
| Greenock to Sona | 992.59 mi (1,597.42 km) |
| Greenock to Sondrio | 923.97 mi (1,486.99 km) |
| Greenock to Sora | 1,282.54 mi (2,064.04 km) |
| Greenock to Sorbolo | 1,014.11 mi (1,632.05 km) |
| Greenock to Soresina | 972.59 mi (1,565.23 km) |
| Greenock to Sorisole | 941.65 mi (1,515.44 km) |
| Greenock to Sorrento | 1,367.04 mi (2,200.03 km) |
| Greenock to Sorso | 1,208.08 mi (1,944.22 km) |
| Greenock to Sortino | 1,590.52 mi (2,559.69 km) |
| Greenock to Soverato Marina | 1,542.60 mi (2,482.57 km) |
| Greenock to Sovicille | 1,125.23 mi (1,810.88 km) |
