| Chelmsford to Smolyan | 1,336.14 mi (2,150.31 km) |
| Chelmsford to Sofia | 1,233.01 mi (1,984.34 km) |
| Chelmsford to Sopot | 1,292.09 mi (2,079.41 km) |
| Chelmsford to Sozopol | 1,421.96 mi (2,288.43 km) |
| Chelmsford to Sredets | 1,404.19 mi (2,259.82 km) |
| Chelmsford to Stamboliyski | 1,305.42 mi (2,100.87 km) |
| Chelmsford to Stara Zagora | 1,337.58 mi (2,152.62 km) |
| Chelmsford to Svilengrad | 1,388.13 mi (2,233.98 km) |
| Chelmsford to Svishtov | 1,277.18 mi (2,055.42 km) |
| Chelmsford to Targovishte | 1,342.43 mi (2,160.43 km) |
| Chelmsford to Teteven | 1,261.42 mi (2,030.07 km) |
| Chelmsford to Troyan | 1,281.00 mi (2,061.57 km) |
| Chelmsford to Tryavna | 1,313.48 mi (2,113.85 km) |
| Chelmsford to Tutrakan | 1,312.87 mi (2,112.87 km) |
| Chelmsford to Varna | 1,398.92 mi (2,251.34 km) |
