| Port Neches to Orangeburg (South Carolina) | 805.35 mi (1,296.09 km) |
| Port Neches to Orangevale (California) | 1,660.75 mi (2,672.71 km) |
| Port Neches to Orchards (Washington) | 1,884.01 mi (3,032.02 km) |
| Port Neches to Orcutt (California) | 1,575.80 mi (2,536.01 km) |
| Port Neches to Oregon (Ohio) | 997.20 mi (1,604.83 km) |
| Port Neches to Oregon (Wisconsin) | 929.43 mi (1,495.78 km) |
| Port Neches to Oregon City (Oregon) | 1,876.63 mi (3,020.14 km) |
| Port Neches to Orem (Utah) | 1,226.94 mi (1,974.57 km) |
| Port Neches to Orinda (California) | 1,700.43 mi (2,736.58 km) |
| Port Neches to Orland Park (Illinois) | 872.36 mi (1,403.93 km) |
| Port Neches to Orlando (Florida) | 766.90 mi (1,234.21 km) |
| Port Neches to Ormond Beach (Florida) | 772.38 mi (1,243.02 km) |
| Port Neches to Oro Valley (Arizona) | 1,019.46 mi (1,640.66 km) |
| Port Neches to Oroville (California) | 1,691.83 mi (2,722.74 km) |
| Port Neches to Oshkosh (Wisconsin) | 1,014.35 mi (1,632.44 km) |
