| Bargoed to Oerlinghausen | 508.22 mi (817.90 km) |
| Bargoed to Oestrich-Winkel | 503.52 mi (810.34 km) |
| Bargoed to Offenburg | 542.44 mi (872.98 km) |
| Bargoed to Oftersheim | 542.80 mi (873.55 km) |
| Bargoed to Ohrdruf | 606.15 mi (975.51 km) |
| Bargoed to Ohringen | 585.48 mi (942.24 km) |
| Bargoed to Olbernhau | 719.77 mi (1,158.35 km) |
| Bargoed to Olching | 689.25 mi (1,109.23 km) |
| Bargoed to Oldenburg | 492.45 mi (792.52 km) |
| Bargoed to Oldenburg in Holstein | 613.18 mi (986.82 km) |
| Bargoed to Olfen | 454.49 mi (731.42 km) |
| Bargoed to Olpe | 479.60 mi (771.85 km) |
| Bargoed to Olsberg | 504.02 mi (811.14 km) |
| Bargoed to Oranienburg | 699.72 mi (1,126.09 km) |
| Bargoed to Ortenberg | 541.57 mi (871.58 km) |
