| Landgraaf to Oerlinghausen | 135.07 mi (217.37 km) |
| Landgraaf to Oestrich-Winkel | 107.00 mi (172.21 km) |
| Landgraaf to Offenburg | 188.93 mi (304.05 km) |
| Landgraaf to Oftersheim | 155.19 mi (249.76 km) |
| Landgraaf to Ohrdruf | 205.12 mi (330.11 km) |
| Landgraaf to Ohringen | 193.96 mi (312.14 km) |
| Landgraaf to Olbernhau | 319.33 mi (513.91 km) |
| Landgraaf to Olching | 301.82 mi (485.74 km) |
| Landgraaf to Oldenburg | 180.21 mi (290.02 km) |
| Landgraaf to Oldenburg in Holstein | 310.33 mi (499.43 km) |
| Landgraaf to Olfen | 80.85 mi (130.12 km) |
| Landgraaf to Olpe | 78.84 mi (126.88 km) |
| Landgraaf to Olsberg | 110.67 mi (178.11 km) |
| Landgraaf to Oranienburg | 332.93 mi (535.81 km) |
| Landgraaf to Ortenberg | 137.97 mi (222.05 km) |
