| Campia Turzii to Oberkirch | 748.03 mi (1,203.84 km) |
| Campia Turzii to Obernburg am Main | 714.50 mi (1,149.88 km) |
| Campia Turzii to Obernkirchen | 770.24 mi (1,239.58 km) |
| Campia Turzii to Oberschleissheim | 587.06 mi (944.79 km) |
| Campia Turzii to Oberstdorf | 643.07 mi (1,034.91 km) |
| Campia Turzii to Obertraubling | 568.45 mi (914.83 km) |
| Campia Turzii to Obertshausen | 731.43 mi (1,177.12 km) |
| Campia Turzii to Oberursel | 744.71 mi (1,198.49 km) |
| Campia Turzii to Ochsenfurt | 671.29 mi (1,080.33 km) |
| Campia Turzii to Ochsenhausen | 660.16 mi (1,062.42 km) |
| Campia Turzii to Ochtrup | 843.70 mi (1,357.81 km) |
| Campia Turzii to Odenthal | 821.25 mi (1,321.67 km) |
| Campia Turzii to Oelde | 796.38 mi (1,281.65 km) |
| Campia Turzii to Oelsnitz | 598.43 mi (963.08 km) |
| Campia Turzii to Oer-Erkenschwick | 828.10 mi (1,332.69 km) |
