| Doncaster to Smolyan | 1,447.15 mi (2,328.97 km) |
| Doncaster to Sofia | 1,343.21 mi (2,161.69 km) |
| Doncaster to Sopot | 1,399.25 mi (2,251.87 km) |
| Doncaster to Sozopol | 1,523.50 mi (2,451.83 km) |
| Doncaster to Sredets | 1,507.05 mi (2,425.36 km) |
| Doncaster to Stamboliyski | 1,414.93 mi (2,277.11 km) |
| Doncaster to Stara Zagora | 1,443.53 mi (2,323.13 km) |
| Doncaster to Svilengrad | 1,495.24 mi (2,406.36 km) |
| Doncaster to Svishtov | 1,379.19 mi (2,219.59 km) |
| Doncaster to Targovishte | 1,443.19 mi (2,322.59 km) |
| Doncaster to Teteven | 1,368.67 mi (2,202.67 km) |
| Doncaster to Troyan | 1,387.36 mi (2,232.74 km) |
| Doncaster to Tryavna | 1,418.15 mi (2,282.28 km) |
| Doncaster to Tutrakan | 1,410.23 mi (2,269.55 km) |
| Doncaster to Varna | 1,496.91 mi (2,409.04 km) |
