| Welkenraedt to Oestrich-Winkel | 100.44 mi (161.64 km) |
| Welkenraedt to Offenburg | 175.22 mi (281.99 km) |
| Welkenraedt to Oftersheim | 146.29 mi (235.44 km) |
| Welkenraedt to Ohrdruf | 208.46 mi (335.48 km) |
| Welkenraedt to Ohringen | 186.56 mi (300.23 km) |
| Welkenraedt to Olbernhau | 322.29 mi (518.68 km) |
| Welkenraedt to Olching | 294.16 mi (473.40 km) |
| Welkenraedt to Oldenburg | 196.39 mi (316.06 km) |
| Welkenraedt to Oldenburg in Holstein | 325.35 mi (523.59 km) |
| Welkenraedt to Olfen | 95.20 mi (153.20 km) |
| Welkenraedt to Olpe | 84.88 mi (136.60 km) |
| Welkenraedt to Olsberg | 119.14 mi (191.73 km) |
| Welkenraedt to Oranienburg | 342.86 mi (551.78 km) |
| Welkenraedt to Ortenberg | 137.13 mi (220.68 km) |
| Welkenraedt to Oschatz | 313.41 mi (504.39 km) |
