| Parkersburg to Oerlinghausen | 4,160.46 mi (6,695.61 km) |
| Parkersburg to Oestrich-Winkel | 4,196.67 mi (6,753.89 km) |
| Parkersburg to Offenburg | 4,243.42 mi (6,829.12 km) |
| Parkersburg to Oftersheim | 4,240.06 mi (6,823.72 km) |
| Parkersburg to Ohrdruf | 4,275.92 mi (6,881.43 km) |
| Parkersburg to Ohringen | 4,281.95 mi (6,891.14 km) |
| Parkersburg to Olbernhau | 4,380.33 mi (7,049.46 km) |
| Parkersburg to Olching | 4,388.07 mi (7,061.91 km) |
| Parkersburg to Oldenburg | 4,107.24 mi (6,609.97 km) |
| Parkersburg to Oldenburg in Holstein | 4,169.21 mi (6,709.70 km) |
| Parkersburg to Olfen | 4,119.15 mi (6,629.14 km) |
| Parkersburg to Olpe | 4,158.11 mi (6,691.83 km) |
| Parkersburg to Olsberg | 4,172.77 mi (6,715.43 km) |
| Parkersburg to Oranienburg | 4,304.90 mi (6,928.06 km) |
| Parkersburg to Ortenberg | 4,226.61 mi (6,802.07 km) |
