| Greenock to Sestu | 1,313.48 mi (2,113.85 km) |
| Greenock to Settimo Torinese | 925.06 mi (1,488.74 km) |
| Greenock to Seveso | 932.29 mi (1,500.38 km) |
| Greenock to Sezze | 1,279.52 mi (2,059.18 km) |
| Greenock to Siano | 1,366.12 mi (2,198.55 km) |
| Greenock to Siena | 1,125.93 mi (1,812.01 km) |
| Greenock to Signa | 1,092.80 mi (1,758.69 km) |
| Greenock to Silea | 1,024.87 mi (1,649.38 km) |
| Greenock to Silvi Paese | 1,249.77 mi (2,011.32 km) |
| Greenock to Sinalunga | 1,143.01 mi (1,839.49 km) |
| Greenock to Siniscola | 1,247.81 mi (2,008.16 km) |
| Greenock to Sinnai | 1,315.74 mi (2,117.48 km) |
| Greenock to Siracusa | 1,603.21 mi (2,580.12 km) |
| Greenock to Solaro | 932.41 mi (1,500.57 km) |
| Greenock to Soliera | 1,033.79 mi (1,663.73 km) |
