| Darlington to Smolyan | 1,491.98 mi (2,401.11 km) |
| Darlington to Sofia | 1,387.77 mi (2,233.41 km) |
| Darlington to Sopot | 1,441.87 mi (2,320.47 km) |
| Darlington to Sozopol | 1,562.54 mi (2,514.67 km) |
| Darlington to Sredets | 1,546.90 mi (2,489.50 km) |
| Darlington to Stamboliyski | 1,458.92 mi (2,347.90 km) |
| Darlington to Stara Zagora | 1,485.34 mi (2,390.42 km) |
| Darlington to Svilengrad | 1,537.63 mi (2,474.57 km) |
| Darlington to Svishtov | 1,418.85 mi (2,283.42 km) |
| Darlington to Targovishte | 1,481.97 mi (2,384.99 km) |
| Darlington to Teteven | 1,411.42 mi (2,271.47 km) |
| Darlington to Troyan | 1,429.54 mi (2,300.62 km) |
| Darlington to Tryavna | 1,459.25 mi (2,348.44 km) |
| Darlington to Tutrakan | 1,447.14 mi (2,328.95 km) |
| Darlington to Varna | 1,533.96 mi (2,468.67 km) |
