| Parkersburg to Oberkirch | 4,247.30 mi (6,835.37 km) |
| Parkersburg to Obernburg am Main | 4,246.74 mi (6,834.46 km) |
| Parkersburg to Obernkirchen | 4,168.15 mi (6,707.98 km) |
| Parkersburg to Oberschleissheim | 4,396.26 mi (7,075.10 km) |
| Parkersburg to Oberstdorf | 4,373.80 mi (7,038.95 km) |
| Parkersburg to Obertraubling | 4,394.91 mi (7,072.92 km) |
| Parkersburg to Obertshausen | 4,227.28 mi (6,803.15 km) |
| Parkersburg to Oberursel | 4,212.84 mi (6,779.90 km) |
| Parkersburg to Ochsenfurt | 4,289.30 mi (6,902.96 km) |
| Parkersburg to Ochsenhausen | 4,337.74 mi (6,980.91 km) |
| Parkersburg to Ochtrup | 4,096.96 mi (6,593.42 km) |
| Parkersburg to Odenthal | 4,129.75 mi (6,646.19 km) |
| Parkersburg to Oelde | 4,144.93 mi (6,670.62 km) |
| Parkersburg to Oelsnitz | 4,344.65 mi (6,992.04 km) |
| Parkersburg to Oer-Erkenschwick | 4,116.33 mi (6,624.59 km) |
