| Port Neches to Olivares | 4,886.85 mi (7,864.63 km) |
| Port Neches to Olivenza | 4,804.91 mi (7,732.75 km) |
| Port Neches to Olot | 5,162.52 mi (8,308.28 km) |
| Port Neches to Onate | 4,911.89 mi (7,904.92 km) |
| Port Neches to Onda | 5,102.03 mi (8,210.92 km) |
| Port Neches to Onteniente | 5,119.95 mi (8,239.76 km) |
| Port Neches to Orihuela | 5,125.70 mi (8,249.02 km) |
| Port Neches to Osuna | 4,944.75 mi (7,957.81 km) |
| Port Neches to Ourense | 4,674.23 mi (7,522.45 km) |
| Port Neches to Oviedo | 4,743.88 mi (7,634.54 km) |
| Port Neches to Paiporta | 5,110.76 mi (8,224.97 km) |
| Port Neches to Pajara | 4,710.93 mi (7,581.51 km) |
| Port Neches to Palafolls | 5,190.58 mi (8,353.44 km) |
| Port Neches to Palafrugell | 5,201.65 mi (8,371.24 km) |
| Port Neches to Palamos | 5,202.35 mi (8,372.37 km) |
