| Gummersbach to Oestrich-Winkel | 73.89 mi (118.91 km) |
| Gummersbach to Offenburg | 178.09 mi (286.60 km) |
| Gummersbach to Oftersheim | 123.39 mi (198.57 km) |
| Gummersbach to Ohrdruf | 138.59 mi (223.04 km) |
| Gummersbach to Ohringen | 152.90 mi (246.07 km) |
| Gummersbach to Olbernhau | 252.76 mi (406.78 km) |
| Gummersbach to Olching | 257.81 mi (414.91 km) |
| Gummersbach to Oldenburg | 148.39 mi (238.81 km) |
| Gummersbach to Oldenburg in Holstein | 264.99 mi (426.46 km) |
| Gummersbach to Olfen | 47.88 mi (77.05 km) |
| Gummersbach to Olpe | 11.64 mi (18.74 km) |
| Gummersbach to Olsberg | 45.32 mi (72.94 km) |
| Gummersbach to Oranienburg | 269.33 mi (433.45 km) |
| Gummersbach to Ortenberg | 80.22 mi (129.11 km) |
| Gummersbach to Oschatz | 240.69 mi (387.36 km) |
