| Port Neches to Octeville | 4,768.55 mi (7,674.25 km) |
| Port Neches to Oignies | 4,934.13 mi (7,940.71 km) |
| Port Neches to Oissel | 4,889.23 mi (7,868.46 km) |
| Port Neches to Olivet | 4,965.15 mi (7,990.63 km) |
| Port Neches to Ollioules | 5,282.82 mi (8,501.88 km) |
| Port Neches to Olonne-sur-Mer | 4,844.82 mi (7,796.99 km) |
| Port Neches to Oloron-Sainte-Marie | 4,990.56 mi (8,031.52 km) |
| Port Neches to Onet Village | 5,099.70 mi (8,207.17 km) |
| Port Neches to Onnaing | 4,960.61 mi (7,983.32 km) |
| Port Neches to Orange | 5,204.52 mi (8,375.86 km) |
| Port Neches to Orchies | 4,943.96 mi (7,956.53 km) |
| Port Neches to Orleans | 4,964.38 mi (7,989.39 km) |
| Port Neches to Orly | 4,959.99 mi (7,982.34 km) |
| Port Neches to Ormesson-sur-Marne | 4,964.77 mi (7,990.03 km) |
| Port Neches to Orsay | 4,952.84 mi (7,970.83 km) |
