| Parkersburg to Octeville | 3,816.86 mi (6,142.64 km) |
| Parkersburg to Oignies | 3,983.41 mi (6,410.68 km) |
| Parkersburg to Oissel | 3,937.63 mi (6,337.01 km) |
| Parkersburg to Olivet | 4,013.44 mi (6,459.00 km) |
| Parkersburg to Ollioules | 4,332.90 mi (6,973.14 km) |
| Parkersburg to Olonne-sur-Mer | 3,894.25 mi (6,267.18 km) |
| Parkersburg to Oloron-Sainte-Marie | 4,043.74 mi (6,507.77 km) |
| Parkersburg to Onet Village | 4,149.80 mi (6,678.46 km) |
| Parkersburg to Onnaing | 4,009.96 mi (6,453.41 km) |
| Parkersburg to Orange | 4,254.08 mi (6,846.27 km) |
| Parkersburg to Orchies | 3,993.30 mi (6,426.59 km) |
| Parkersburg to Orleans | 4,012.66 mi (6,457.76 km) |
| Parkersburg to Orly | 4,008.34 mi (6,450.80 km) |
| Parkersburg to Ormesson-sur-Marne | 4,013.14 mi (6,458.52 km) |
| Parkersburg to Orsay | 4,001.17 mi (6,439.26 km) |
