| Derry to Smolyan | 1,717.35 mi (2,763.80 km) |
| Derry to Sofia | 1,613.40 mi (2,596.51 km) |
| Derry to Sopot | 1,669.21 mi (2,686.33 km) |
| Derry to Sozopol | 1,792.40 mi (2,884.59 km) |
| Derry to Sredets | 1,776.26 mi (2,858.62 km) |
| Derry to Stamboliyski | 1,685.08 mi (2,711.87 km) |
| Derry to Stara Zagora | 1,713.32 mi (2,757.33 km) |
| Derry to Svilengrad | 1,765.17 mi (2,840.76 km) |
| Derry to Svishtov | 1,648.31 mi (2,652.69 km) |
| Derry to Targovishte | 1,711.96 mi (2,755.14 km) |
| Derry to Teteven | 1,638.65 mi (2,637.16 km) |
| Derry to Troyan | 1,657.23 mi (2,667.05 km) |
| Derry to Tryavna | 1,687.75 mi (2,716.18 km) |
| Derry to Tutrakan | 1,678.09 mi (2,700.62 km) |
| Derry to Varna | 1,764.86 mi (2,840.27 km) |
