| Southgate to Smolyan | 1,357.82 mi (2,185.20 km) |
| Southgate to Sofia | 1,254.89 mi (2,019.55 km) |
| Southgate to Sopot | 1,314.47 mi (2,115.43 km) |
| Southgate to Sozopol | 1,445.15 mi (2,325.75 km) |
| Southgate to Sredets | 1,427.19 mi (2,296.85 km) |
| Southgate to Stamboliyski | 1,327.39 mi (2,136.22 km) |
| Southgate to Stara Zagora | 1,360.13 mi (2,188.92 km) |
| Southgate to Svilengrad | 1,410.48 mi (2,269.95 km) |
| Southgate to Svishtov | 1,300.36 mi (2,092.72 km) |
| Southgate to Targovishte | 1,365.76 mi (2,197.98 km) |
| Southgate to Teteven | 1,283.80 mi (2,066.08 km) |
| Southgate to Troyan | 1,303.52 mi (2,097.81 km) |
| Southgate to Tryavna | 1,336.26 mi (2,150.50 km) |
| Southgate to Tutrakan | 1,336.66 mi (2,151.15 km) |
| Southgate to Varna | 1,422.59 mi (2,289.44 km) |
