| Heswall to Smolyan | 1,516.63 mi (2,440.78 km) |
| Heswall to Sofia | 1,413.01 mi (2,274.02 km) |
| Heswall to Sopot | 1,470.41 mi (2,366.39 km) |
| Heswall to Sozopol | 1,596.89 mi (2,569.94 km) |
| Heswall to Sredets | 1,579.95 mi (2,542.69 km) |
| Heswall to Stamboliyski | 1,485.08 mi (2,390.01 km) |
| Heswall to Stara Zagora | 1,515.21 mi (2,438.49 km) |
| Heswall to Svilengrad | 1,566.48 mi (2,521.00 km) |
| Heswall to Svishtov | 1,452.33 mi (2,337.29 km) |
| Heswall to Targovishte | 1,516.81 mi (2,441.06 km) |
| Heswall to Teteven | 1,439.78 mi (2,317.10 km) |
| Heswall to Troyan | 1,458.84 mi (2,347.78 km) |
| Heswall to Tryavna | 1,490.32 mi (2,398.44 km) |
| Heswall to Tutrakan | 1,484.95 mi (2,389.79 km) |
| Heswall to Varna | 1,571.47 mi (2,529.04 km) |
