| Chelsea to Smolyan | 4,622.37 mi (7,438.99 km) |
| Chelsea to Sofia | 4,520.08 mi (7,274.36 km) |
| Chelsea to Sopot | 4,580.27 mi (7,371.23 km) |
| Chelsea to Sozopol | 4,709.39 mi (7,579.02 km) |
| Chelsea to Sredets | 4,692.13 mi (7,551.25 km) |
| Chelsea to Stamboliyski | 4,592.72 mi (7,391.27 km) |
| Chelsea to Stara Zagora | 4,625.90 mi (7,444.67 km) |
| Chelsea to Svilengrad | 4,676.27 mi (7,525.73 km) |
| Chelsea to Svishtov | 4,564.72 mi (7,346.21 km) |
| Chelsea to Targovishte | 4,629.40 mi (7,450.30 km) |
| Chelsea to Teteven | 4,549.61 mi (7,321.89 km) |
| Chelsea to Troyan | 4,569.31 mi (7,353.59 km) |
| Chelsea to Tryavna | 4,601.77 mi (7,405.84 km) |
| Chelsea to Tutrakan | 4,597.31 mi (7,398.66 km) |
| Chelsea to Varna | 4,683.94 mi (7,538.08 km) |
