| Sittingbourne to Smolyan | 1,315.78 mi (2,117.54 km) |
| Sittingbourne to Sofia | 1,212.93 mi (1,952.02 km) |
| Sittingbourne to Sopot | 1,272.71 mi (2,048.24 km) |
| Sittingbourne to Sozopol | 1,403.88 mi (2,259.32 km) |
| Sittingbourne to Sredets | 1,385.79 mi (2,230.22 km) |
| Sittingbourne to Stamboliyski | 1,285.45 mi (2,068.73 km) |
| Sittingbourne to Stara Zagora | 1,318.47 mi (2,121.87 km) |
| Sittingbourne to Svilengrad | 1,368.71 mi (2,202.72 km) |
| Sittingbourne to Svishtov | 1,259.09 mi (2,026.30 km) |
| Sittingbourne to Targovishte | 1,324.59 mi (2,131.73 km) |
| Sittingbourne to Teteven | 1,242.05 mi (1,998.89 km) |
| Sittingbourne to Troyan | 1,261.84 mi (2,030.73 km) |
| Sittingbourne to Tryavna | 1,294.71 mi (2,083.64 km) |
| Sittingbourne to Tutrakan | 1,295.89 mi (2,085.53 km) |
| Sittingbourne to Varna | 1,381.71 mi (2,223.64 km) |
