| Portchester to Smolyan | 1,380.41 mi (2,221.56 km) |
| Portchester to Sofia | 1,278.48 mi (2,057.51 km) |
| Portchester to Sopot | 1,340.05 mi (2,156.61 km) |
| Portchester to Sozopol | 1,474.14 mi (2,372.40 km) |
| Portchester to Sredets | 1,455.37 mi (2,342.19 km) |
| Portchester to Stamboliyski | 1,351.22 mi (2,174.57 km) |
| Portchester to Stara Zagora | 1,386.42 mi (2,231.22 km) |
| Portchester to Svilengrad | 1,435.79 mi (2,310.68 km) |
| Portchester to Svishtov | 1,329.50 mi (2,139.63 km) |
| Portchester to Targovishte | 1,395.49 mi (2,245.83 km) |
| Portchester to Teteven | 1,309.44 mi (2,107.34 km) |
| Portchester to Troyan | 1,329.71 mi (2,139.97 km) |
| Portchester to Tryavna | 1,363.51 mi (2,194.36 km) |
| Portchester to Tutrakan | 1,368.61 mi (2,202.57 km) |
| Portchester to Varna | 1,453.88 mi (2,339.80 km) |
