| Port Neches to Odenton (Maryland) | 1,162.63 mi (1,871.07 km) |
| Port Neches to Odessa (Texas) | 514.72 mi (828.36 km) |
| Port Neches to Ogden (Utah) | 1,272.07 mi (2,047.20 km) |
| Port Neches to Oildale (California) | 1,501.79 mi (2,416.90 km) |
| Port Neches to Ojus (Florida) | 885.19 mi (1,424.57 km) |
| Port Neches to Okemos (Michigan) | 1,025.53 mi (1,650.43 km) |
| Port Neches to Oklahoma City (Oklahoma) | 432.29 mi (695.70 km) |
| Port Neches to Okmulgee (Oklahoma) | 407.42 mi (655.68 km) |
| Port Neches to Olathe (Kansas) | 617.40 mi (993.61 km) |
| Port Neches to Old Jamestown (Missouri) | 646.79 mi (1,040.91 km) |
| Port Neches to Oldsmar (Florida) | 693.89 mi (1,116.70 km) |
| Port Neches to Olean (New York) | 1,200.90 mi (1,932.67 km) |
| Port Neches to Olive Branch (Mississippi) | 419.06 mi (674.42 km) |
| Port Neches to Olivehurst (California) | 1,684.50 mi (2,710.94 km) |
| Port Neches to Olney (Maryland) | 1,147.33 mi (1,846.46 km) |
