| Portishead to Smolyan | 1,461.56 mi (2,352.16 km) |
| Portishead to Sofia | 1,359.28 mi (2,187.55 km) |
| Portishead to Sopot | 1,420.17 mi (2,285.55 km) |
| Portishead to Sozopol | 1,552.92 mi (2,499.18 km) |
| Portishead to Sredets | 1,534.49 mi (2,469.53 km) |
| Portishead to Stamboliyski | 1,431.96 mi (2,304.51 km) |
| Portishead to Stara Zagora | 1,466.29 mi (2,359.76 km) |
| Portishead to Svilengrad | 1,516.03 mi (2,439.82 km) |
| Portishead to Svishtov | 1,408.17 mi (2,266.24 km) |
| Portishead to Targovishte | 1,473.92 mi (2,372.04 km) |
| Portishead to Teteven | 1,389.53 mi (2,236.23 km) |
| Portishead to Troyan | 1,409.60 mi (2,268.53 km) |
| Portishead to Tryavna | 1,442.99 mi (2,322.27 km) |
| Portishead to Tutrakan | 1,445.96 mi (2,327.05 km) |
| Portishead to Varna | 1,531.59 mi (2,464.85 km) |
