| Roskilde to Obernburg am Main | 419.77 mi (675.55 km) |
| Roskilde to Obernkirchen | 262.98 mi (423.23 km) |
| Roskilde to Oberschleissheim | 511.76 mi (823.60 km) |
| Roskilde to Oberstdorf | 574.55 mi (924.66 km) |
| Roskilde to Obertraubling | 461.85 mi (743.27 km) |
| Roskilde to Obertshausen | 408.79 mi (657.88 km) |
| Roskilde to Oberursel | 403.55 mi (649.45 km) |
| Roskilde to Ochsenfurt | 423.04 mi (680.82 km) |
| Roskilde to Ochsenhausen | 531.38 mi (855.17 km) |
| Roskilde to Ochtrup | 310.11 mi (499.07 km) |
| Roskilde to Odenthal | 378.90 mi (609.78 km) |
| Roskilde to Oelde | 308.72 mi (496.83 km) |
| Roskilde to Oelsnitz | 361.60 mi (581.94 km) |
| Roskilde to Oer-Erkenschwick | 340.20 mi (547.49 km) |
| Roskilde to Oerlinghausen | 290.08 mi (466.84 km) |
