| Grevenmacher to Oerlinghausen | 185.40 mi (298.37 km) |
| Grevenmacher to Oestrich-Winkel | 72.86 mi (117.25 km) |
| Grevenmacher to Offenburg | 107.66 mi (173.27 km) |
| Grevenmacher to Oftersheim | 98.47 mi (158.46 km) |
| Grevenmacher to Ohrdruf | 205.44 mi (330.62 km) |
| Grevenmacher to Ohringen | 141.35 mi (227.47 km) |
| Grevenmacher to Olbernhau | 312.36 mi (502.69 km) |
| Grevenmacher to Olching | 243.69 mi (392.18 km) |
| Grevenmacher to Oldenburg | 251.16 mi (404.21 km) |
| Grevenmacher to Oldenburg in Holstein | 370.75 mi (596.67 km) |
| Grevenmacher to Olfen | 146.59 mi (235.91 km) |
| Grevenmacher to Olpe | 110.84 mi (178.38 km) |
| Grevenmacher to Olsberg | 146.10 mi (235.13 km) |
| Grevenmacher to Oranienburg | 362.50 mi (583.39 km) |
| Grevenmacher to Ortenberg | 125.05 mi (201.25 km) |
