| Hwlffordd to Oberkirch | 619.17 mi (996.45 km) |
| Hwlffordd to Obernburg am Main | 629.60 mi (1,013.24 km) |
| Hwlffordd to Obernkirchen | 598.74 mi (963.58 km) |
| Hwlffordd to Oberschleissheim | 771.94 mi (1,242.31 km) |
| Hwlffordd to Oberstdorf | 745.29 mi (1,199.44 km) |
| Hwlffordd to Obertraubling | 777.97 mi (1,252.02 km) |
| Hwlffordd to Obertshausen | 611.88 mi (984.73 km) |
| Hwlffordd to Oberursel | 598.34 mi (962.94 km) |
| Hwlffordd to Ochsenfurt | 672.95 mi (1,083.00 km) |
| Hwlffordd to Ochsenhausen | 710.07 mi (1,142.75 km) |
| Hwlffordd to Ochtrup | 517.39 mi (832.66 km) |
| Hwlffordd to Odenthal | 522.90 mi (841.52 km) |
| Hwlffordd to Oelde | 559.63 mi (900.64 km) |
| Hwlffordd to Oelsnitz | 747.74 mi (1,203.37 km) |
| Hwlffordd to Oer-Erkenschwick | 522.58 mi (841.02 km) |
