| Olen to Nova Zagora | 1,159.63 mi (1,866.24 km) |
| Olen to Novi Iskar | 1,041.14 mi (1,675.56 km) |
| Olen to Novi Pazar | 1,172.19 mi (1,886.46 km) |
| Olen to Omurtag | 1,150.31 mi (1,851.25 km) |
| Olen to Panagyurishte | 1,086.90 mi (1,749.20 km) |
| Olen to Parvomay | 1,145.11 mi (1,842.88 km) |
| Olen to Pavlikeni | 1,100.14 mi (1,770.50 km) |
| Olen to Pazardzhik | 1,106.16 mi (1,780.19 km) |
| Olen to Pernik | 1,037.89 mi (1,670.32 km) |
| Olen to Peshtera | 1,112.41 mi (1,790.25 km) |
| Olen to Petrich | 1,100.67 mi (1,771.36 km) |
| Olen to Pleven | 1,065.12 mi (1,714.14 km) |
| Olen to Plovdiv | 1,124.62 mi (1,809.90 km) |
| Olen to Pomorie | 1,221.01 mi (1,965.02 km) |
| Olen to Popovo | 1,132.66 mi (1,822.83 km) |
