| Westerville to Oberkirch | 4,263.30 mi (6,861.12 km) |
| Westerville to Obernburg am Main | 4,260.00 mi (6,855.81 km) |
| Westerville to Obernkirchen | 4,177.43 mi (6,722.92 km) |
| Westerville to Oberschleissheim | 4,410.59 mi (7,098.16 km) |
| Westerville to Oberstdorf | 4,390.25 mi (7,065.42 km) |
| Westerville to Obertraubling | 4,407.75 mi (7,093.59 km) |
| Westerville to Obertshausen | 4,240.35 mi (6,824.19 km) |
| Westerville to Oberursel | 4,225.83 mi (6,800.82 km) |
| Westerville to Ochsenfurt | 4,302.33 mi (6,923.93 km) |
| Westerville to Ochsenhausen | 4,353.35 mi (7,006.04 km) |
| Westerville to Ochtrup | 4,107.37 mi (6,610.17 km) |
| Westerville to Odenthal | 4,142.18 mi (6,666.20 km) |
| Westerville to Oelde | 4,155.46 mi (6,687.56 km) |
| Westerville to Oelsnitz | 4,355.21 mi (7,009.04 km) |
| Westerville to Oer-Erkenschwick | 4,127.66 mi (6,642.82 km) |
