| Circleville to Oberkirch | 4,287.43 mi (6,899.95 km) |
| Circleville to Obernburg am Main | 4,284.89 mi (6,895.87 km) |
| Circleville to Obernkirchen | 4,203.38 mi (6,764.69 km) |
| Circleville to Oberschleissheim | 4,435.20 mi (7,137.76 km) |
| Circleville to Oberstdorf | 4,414.26 mi (7,104.06 km) |
| Circleville to Obertraubling | 4,432.77 mi (7,133.85 km) |
| Circleville to Obertshausen | 4,265.30 mi (6,864.33 km) |
| Circleville to Oberursel | 4,250.79 mi (6,840.99 km) |
| Circleville to Ochsenfurt | 4,327.29 mi (6,964.10 km) |
| Circleville to Ochsenhausen | 4,377.59 mi (7,045.06 km) |
| Circleville to Ochtrup | 4,133.02 mi (6,651.45 km) |
| Circleville to Odenthal | 4,167.29 mi (6,706.61 km) |
| Circleville to Oelde | 4,181.08 mi (6,728.80 km) |
| Circleville to Oelsnitz | 4,380.84 mi (7,050.28 km) |
| Circleville to Oer-Erkenschwick | 4,153.06 mi (6,683.71 km) |
