| Billdal to Oerlinghausen | 409.20 mi (658.55 km) |
| Billdal to Oestrich-Winkel | 547.76 mi (881.54 km) |
| Billdal to Offenburg | 651.17 mi (1,047.96 km) |
| Billdal to Oftersheim | 583.73 mi (939.42 km) |
| Billdal to Ohrdruf | 469.23 mi (755.16 km) |
| Billdal to Ohringen | 587.74 mi (945.88 km) |
| Billdal to Olbernhau | 481.21 mi (774.44 km) |
| Billdal to Olching | 648.83 mi (1,044.18 km) |
| Billdal to Oldenburg | 339.61 mi (546.55 km) |
| Billdal to Oldenburg in Holstein | 230.46 mi (370.88 km) |
| Billdal to Olfen | 444.04 mi (714.62 km) |
| Billdal to Olpe | 482.67 mi (776.77 km) |
| Billdal to Olsberg | 452.26 mi (727.85 km) |
| Billdal to Oranienburg | 337.57 mi (543.27 km) |
| Billdal to Ortenberg | 512.77 mi (825.22 km) |
