| Warren to Oberkirch | 4,160.56 mi (6,695.78 km) |
| Warren to Obernburg am Main | 4,153.55 mi (6,684.49 km) |
| Warren to Obernkirchen | 4,065.84 mi (6,543.34 km) |
| Warren to Oberschleissheim | 4,305.40 mi (6,928.88 km) |
| Warren to Oberstdorf | 4,287.98 mi (6,900.83 km) |
| Warren to Obertraubling | 4,300.57 mi (6,921.10 km) |
| Warren to Obertshausen | 4,133.67 mi (6,652.50 km) |
| Warren to Oberursel | 4,119.06 mi (6,628.98 km) |
| Warren to Ochsenfurt | 4,195.52 mi (6,752.03 km) |
| Warren to Ochsenhausen | 4,249.97 mi (6,839.67 km) |
| Warren to Ochtrup | 3,997.31 mi (6,433.06 km) |
| Warren to Odenthal | 4,034.75 mi (6,493.30 km) |
| Warren to Oelde | 4,045.51 mi (6,510.62 km) |
| Warren to Oelsnitz | 4,245.09 mi (6,831.81 km) |
| Warren to Oer-Erkenschwick | 4,018.79 mi (6,467.62 km) |
