| Jefferson Hills to Octeville | 3,705.67 mi (5,963.71 km) |
| Jefferson Hills to Oignies | 3,872.22 mi (6,231.73 km) |
| Jefferson Hills to Oissel | 3,826.43 mi (6,158.05 km) |
| Jefferson Hills to Olivet | 3,902.30 mi (6,280.15 km) |
| Jefferson Hills to Ollioules | 4,222.20 mi (6,794.97 km) |
| Jefferson Hills to Olonne-sur-Mer | 3,783.42 mi (6,088.83 km) |
| Jefferson Hills to Oloron-Sainte-Marie | 3,933.60 mi (6,330.52 km) |
| Jefferson Hills to Onet Village | 4,039.11 mi (6,500.31 km) |
| Jefferson Hills to Onnaing | 3,898.78 mi (6,274.48 km) |
| Jefferson Hills to Orange | 4,143.27 mi (6,667.95 km) |
| Jefferson Hills to Orchies | 3,882.11 mi (6,247.66 km) |
| Jefferson Hills to Orleans | 3,901.52 mi (6,278.89 km) |
| Jefferson Hills to Orly | 3,897.15 mi (6,271.85 km) |
| Jefferson Hills to Ormesson-sur-Marne | 3,901.94 mi (6,279.57 km) |
| Jefferson Hills to Orsay | 3,889.98 mi (6,260.32 km) |
