| Port Arthur to Octeville | 4,773.78 mi (7,682.65 km) |
| Port Arthur to Oignies | 4,939.59 mi (7,949.49 km) |
| Port Arthur to Oissel | 4,894.51 mi (7,876.95 km) |
| Port Arthur to Olivet | 4,970.29 mi (7,998.90 km) |
| Port Arthur to Ollioules | 5,287.59 mi (8,509.55 km) |
| Port Arthur to Olonne-sur-Mer | 4,849.68 mi (7,804.81 km) |
| Port Arthur to Oloron-Sainte-Marie | 4,995.06 mi (8,038.77 km) |
| Port Arthur to Onet Village | 5,104.47 mi (8,214.85 km) |
| Port Arthur to Onnaing | 4,966.08 mi (7,992.13 km) |
| Port Arthur to Orange | 5,209.35 mi (8,383.64 km) |
| Port Arthur to Orchies | 4,949.42 mi (7,965.33 km) |
| Port Arthur to Orleans | 4,969.52 mi (7,997.67 km) |
| Port Arthur to Orly | 4,965.24 mi (7,990.79 km) |
| Port Arthur to Ormesson-sur-Marne | 4,970.03 mi (7,998.50 km) |
| Port Arthur to Orsay | 4,958.08 mi (7,979.26 km) |
