| Penkridge to Smolyan | 1,463.58 mi (2,355.40 km) |
| Penkridge to Sofia | 1,360.18 mi (2,189.00 km) |
| Penkridge to Sopot | 1,418.38 mi (2,282.66 km) |
| Penkridge to Sozopol | 1,546.40 mi (2,488.69 km) |
| Penkridge to Sredets | 1,529.09 mi (2,460.84 km) |
| Penkridge to Stamboliyski | 1,432.43 mi (2,305.27 km) |
| Penkridge to Stara Zagora | 1,463.50 mi (2,355.28 km) |
| Penkridge to Svilengrad | 1,514.45 mi (2,437.28 km) |
| Penkridge to Svishtov | 1,401.70 mi (2,255.82 km) |
| Penkridge to Targovishte | 1,466.53 mi (2,360.15 km) |
| Penkridge to Teteven | 1,387.73 mi (2,233.33 km) |
| Penkridge to Troyan | 1,407.03 mi (2,264.40 km) |
| Penkridge to Tryavna | 1,438.97 mi (2,315.79 km) |
| Penkridge to Tutrakan | 1,435.63 mi (2,310.42 km) |
| Penkridge to Varna | 1,521.98 mi (2,449.39 km) |
