| Penafiel to Smolyan | 1,699.32 mi (2,734.78 km) |
| Penafiel to Sofia | 1,618.25 mi (2,604.32 km) |
| Penafiel to Sopot | 1,690.21 mi (2,720.13 km) |
| Penafiel to Sozopol | 1,841.09 mi (2,962.95 km) |
| Penafiel to Sredets | 1,816.71 mi (2,923.71 km) |
| Penafiel to Stamboliyski | 1,684.52 mi (2,710.97 km) |
| Penafiel to Stara Zagora | 1,737.72 mi (2,796.58 km) |
| Penafiel to Svilengrad | 1,773.21 mi (2,853.70 km) |
| Penafiel to Svishtov | 1,712.05 mi (2,755.28 km) |
| Penafiel to Targovishte | 1,776.51 mi (2,859.01 km) |
| Penafiel to Teteven | 1,663.50 mi (2,677.14 km) |
| Penafiel to Troyan | 1,686.38 mi (2,713.97 km) |
| Penafiel to Tryavna | 1,725.84 mi (2,777.48 km) |
| Penafiel to Tutrakan | 1,771.70 mi (2,851.28 km) |
| Penafiel to Varna | 1,843.31 mi (2,966.52 km) |
