| Olfen to Smolyan | 1,074.41 mi (1,729.10 km) |
| Olfen to Sofia | 970.16 mi (1,561.32 km) |
| Olfen to Sopot | 1,023.98 mi (1,647.94 km) |
| Olfen to Sozopol | 1,145.87 mi (1,844.10 km) |
| Olfen to Sredets | 1,129.78 mi (1,818.21 km) |
| Olfen to Stamboliyski | 1,041.14 mi (1,675.55 km) |
| Olfen to Stara Zagora | 1,067.54 mi (1,718.05 km) |
| Olfen to Svilengrad | 1,119.76 mi (1,802.08 km) |
| Olfen to Svishtov | 1,001.80 mi (1,612.24 km) |
| Olfen to Targovishte | 1,065.45 mi (1,714.67 km) |
| Olfen to Teteven | 993.53 mi (1,598.93 km) |
| Olfen to Troyan | 1,011.68 mi (1,628.14 km) |
| Olfen to Tryavna | 1,041.62 mi (1,676.33 km) |
| Olfen to Tutrakan | 1,032.09 mi (1,660.99 km) |
| Olfen to Varna | 1,118.79 mi (1,800.52 km) |
