| Gloucester to Sestu | 1,024.07 mi (1,648.09 km) |
| Gloucester to Settimo Torinese | 651.85 mi (1,049.05 km) |
| Gloucester to Seveso | 672.14 mi (1,081.71 km) |
| Gloucester to Sezze | 1,015.67 mi (1,634.57 km) |
| Gloucester to Siano | 1,107.22 mi (1,781.91 km) |
| Gloucester to Siena | 862.79 mi (1,388.53 km) |
| Gloucester to Signa | 831.30 mi (1,337.85 km) |
| Gloucester to Silea | 786.96 mi (1,266.49 km) |
| Gloucester to Silvi Paese | 997.96 mi (1,606.07 km) |
| Gloucester to Sinalunga | 881.59 mi (1,418.78 km) |
| Gloucester to Siniscola | 963.97 mi (1,551.36 km) |
| Gloucester to Sinnai | 1,026.71 mi (1,652.34 km) |
| Gloucester to Siracusa | 1,331.63 mi (2,143.05 km) |
| Gloucester to Solaro | 671.64 mi (1,080.90 km) |
| Gloucester to Soliera | 778.22 mi (1,252.43 km) |
