| Sredets to Oestrich-Winkel | 1,055.35 mi (1,698.42 km) |
| Sredets to Offenburg | 1,021.98 mi (1,644.72 km) |
| Sredets to Oftersheim | 1,014.77 mi (1,633.12 km) |
| Sredets to Ohrdruf | 973.36 mi (1,566.48 km) |
| Sredets to Ohringen | 972.11 mi (1,564.45 km) |
| Sredets to Olbernhau | 872.12 mi (1,403.54 km) |
| Sredets to Olching | 869.33 mi (1,399.05 km) |
| Sredets to Oldenburg | 1,148.76 mi (1,848.76 km) |
| Sredets to Oldenburg in Holstein | 1,109.83 mi (1,786.10 km) |
| Sredets to Olfen | 1,129.78 mi (1,818.21 km) |
| Sredets to Olpe | 1,090.86 mi (1,755.57 km) |
| Sredets to Olsberg | 1,076.15 mi (1,731.89 km) |
| Sredets to Oranienburg | 966.57 mi (1,555.54 km) |
| Sredets to Ortenberg | 1,022.84 mi (1,646.10 km) |
| Sredets to Oschatz | 906.16 mi (1,458.33 km) |
