| Gloucester to Sinop | 1,865.47 mi (3,002.19 km) |
| Gloucester to Siran | 2,107.68 mi (3,391.98 km) |
| Gloucester to Sirnak | 2,362.45 mi (3,801.99 km) |
| Gloucester to Sirvan | 2,320.49 mi (3,734.47 km) |
| Gloucester to Sivas | 2,036.62 mi (3,277.62 km) |
| Gloucester to Sivasli | 1,788.02 mi (2,877.54 km) |
| Gloucester to Siverek | 2,219.64 mi (3,572.16 km) |
| Gloucester to Sivrice | 2,189.02 mi (3,522.88 km) |
| Gloucester to Sivrihisar | 1,820.54 mi (2,929.87 km) |
| Gloucester to Sogut | 1,739.83 mi (2,799.99 km) |
| Gloucester to Sogutlu | 1,714.74 mi (2,759.61 km) |
| Gloucester to Soke | 1,731.50 mi (2,786.58 km) |
| Gloucester to Solhan | 2,240.42 mi (3,605.61 km) |
| Gloucester to Soma | 1,672.12 mi (2,691.02 km) |
| Gloucester to Sorgun | 1,957.03 mi (3,149.54 km) |
