| Gloucester City to Smolyan | 4,896.21 mi (7,879.69 km) |
| Gloucester City to Sofia | 4,793.96 mi (7,715.13 km) |
| Gloucester City to Sopot | 4,854.21 mi (7,812.10 km) |
| Gloucester City to Sozopol | 4,983.35 mi (8,019.92 km) |
| Gloucester City to Sredets | 4,966.10 mi (7,992.16 km) |
| Gloucester City to Stamboliyski | 4,866.61 mi (7,832.05 km) |
| Gloucester City to Stara Zagora | 4,899.85 mi (7,885.55 km) |
| Gloucester City to Svilengrad | 4,950.21 mi (7,966.59 km) |
| Gloucester City to Svishtov | 4,838.69 mi (7,787.11 km) |
| Gloucester City to Targovishte | 4,903.36 mi (7,891.19 km) |
| Gloucester City to Teteven | 4,823.55 mi (7,762.75 km) |
| Gloucester City to Troyan | 4,843.26 mi (7,794.47 km) |
| Gloucester City to Tryavna | 4,875.74 mi (7,846.74 km) |
| Gloucester City to Tutrakan | 4,871.22 mi (7,839.47 km) |
| Gloucester City to Varna | 4,957.85 mi (7,978.89 km) |
