| Port Neches to Opwijk | 4,966.57 mi (7,992.93 km) |
| Port Neches to Ostend | 4,909.31 mi (7,900.77 km) |
| Port Neches to Oud-Heverlee | 4,989.55 mi (8,029.90 km) |
| Port Neches to Oud-Turnhout | 4,987.29 mi (8,026.27 km) |
| Port Neches to Oudenaarde | 4,947.06 mi (7,961.53 km) |
| Port Neches to Oudenburg | 4,913.71 mi (7,907.85 km) |
| Port Neches to Oupeye | 5,031.63 mi (8,097.63 km) |
| Port Neches to Overijse | 4,985.82 mi (8,023.90 km) |
| Port Neches to Overpelt | 5,007.15 mi (8,058.23 km) |
| Port Neches to Paal | 5,003.10 mi (8,051.70 km) |
| Port Neches to Peer | 5,011.16 mi (8,064.68 km) |
| Port Neches to Pepinster | 5,042.82 mi (8,115.64 km) |
| Port Neches to Peruwelz | 4,956.21 mi (7,976.25 km) |
| Port Neches to Perwez | 5,001.71 mi (8,049.48 km) |
| Port Neches to Philippeville | 5,004.10 mi (8,053.32 km) |
