| Billdal to Oberkirch | 645.14 mi (1,038.26 km) |
| Billdal to Obernburg am Main | 546.94 mi (880.21 km) |
| Billdal to Obernkirchen | 383.91 mi (617.84 km) |
| Billdal to Oberschleissheim | 645.05 mi (1,038.10 km) |
| Billdal to Oberstdorf | 706.31 mi (1,136.69 km) |
| Billdal to Obertraubling | 595.49 mi (958.35 km) |
| Billdal to Obertshausen | 534.37 mi (859.98 km) |
| Billdal to Oberursel | 527.74 mi (849.31 km) |
| Billdal to Ochsenfurt | 553.40 mi (890.60 km) |
| Billdal to Ochsenhausen | 662.28 mi (1,065.84 km) |
| Billdal to Ochtrup | 416.39 mi (670.11 km) |
| Billdal to Odenthal | 492.15 mi (792.04 km) |
| Billdal to Oelde | 424.86 mi (683.74 km) |
| Billdal to Oelsnitz | 495.25 mi (797.03 km) |
| Billdal to Oer-Erkenschwick | 450.97 mi (725.76 km) |
