| Peterborough to Smolyan | 1,386.43 mi (2,231.24 km) |
| Peterborough to Sofia | 1,282.84 mi (2,064.54 km) |
| Peterborough to Sopot | 1,340.47 mi (2,157.28 km) |
| Peterborough to Sozopol | 1,467.69 mi (2,362.02 km) |
| Peterborough to Sredets | 1,450.55 mi (2,334.44 km) |
| Peterborough to Stamboliyski | 1,354.96 mi (2,180.59 km) |
| Peterborough to Stara Zagora | 1,385.40 mi (2,229.58 km) |
| Peterborough to Svilengrad | 1,436.55 mi (2,311.90 km) |
| Peterborough to Svishtov | 1,323.05 mi (2,129.24 km) |
| Peterborough to Targovishte | 1,387.74 mi (2,233.34 km) |
| Peterborough to Teteven | 1,309.83 mi (2,107.97 km) |
| Peterborough to Troyan | 1,328.99 mi (2,138.80 km) |
| Peterborough to Tryavna | 1,360.67 mi (2,189.78 km) |
| Peterborough to Tutrakan | 1,356.51 mi (2,183.10 km) |
| Peterborough to Varna | 1,442.92 mi (2,322.16 km) |
