| Balchik to Oestrich-Winkel | 1,053.16 mi (1,694.90 km) |
| Balchik to Offenburg | 1,028.61 mi (1,655.39 km) |
| Balchik to Oftersheim | 1,015.38 mi (1,634.10 km) |
| Balchik to Ohrdruf | 962.19 mi (1,548.49 km) |
| Balchik to Ohringen | 972.49 mi (1,565.06 km) |
| Balchik to Olbernhau | 856.30 mi (1,378.08 km) |
| Balchik to Olching | 873.39 mi (1,405.58 km) |
| Balchik to Oldenburg | 1,130.26 mi (1,818.98 km) |
| Balchik to Oldenburg in Holstein | 1,081.38 mi (1,740.32 km) |
| Balchik to Olfen | 1,119.41 mi (1,801.52 km) |
| Balchik to Olpe | 1,083.43 mi (1,743.61 km) |
| Balchik to Olsberg | 1,066.00 mi (1,715.57 km) |
| Balchik to Oranienburg | 939.86 mi (1,512.56 km) |
| Balchik to Ortenberg | 1,017.18 mi (1,636.99 km) |
| Balchik to Oschatz | 887.26 mi (1,427.91 km) |
