| Billericay to Smolyan | 1,335.96 mi (2,150.02 km) |
| Billericay to Sofia | 1,232.93 mi (1,984.21 km) |
| Billericay to Sopot | 1,292.25 mi (2,079.68 km) |
| Billericay to Sozopol | 1,422.56 mi (2,289.39 km) |
| Billericay to Sredets | 1,404.69 mi (2,260.62 km) |
| Billericay to Stamboliyski | 1,305.38 mi (2,100.80 km) |
| Billericay to Stara Zagora | 1,337.83 mi (2,153.04 km) |
| Billericay to Svilengrad | 1,388.28 mi (2,234.23 km) |
| Billericay to Svishtov | 1,277.77 mi (2,056.37 km) |
| Billericay to Targovishte | 1,343.11 mi (2,161.52 km) |
| Billericay to Teteven | 1,261.59 mi (2,030.33 km) |
| Billericay to Troyan | 1,281.24 mi (2,061.95 km) |
| Billericay to Tryavna | 1,313.85 mi (2,114.44 km) |
| Billericay to Tutrakan | 1,313.82 mi (2,114.39 km) |
| Billericay to Varna | 1,399.79 mi (2,252.75 km) |
