| Port Neches to Oskaloosa (Iowa) | 785.24 mi (1,263.72 km) |
| Port Neches to Oswego (Illinois) | 867.22 mi (1,395.66 km) |
| Port Neches to Oswego (New York) | 1,336.55 mi (2,150.96 km) |
| Port Neches to Otsego (Minnesota) | 1,056.55 mi (1,700.35 km) |
| Port Neches to Ottawa (Illinois) | 836.67 mi (1,346.49 km) |
| Port Neches to Ottawa (Kansas) | 600.51 mi (966.42 km) |
| Port Neches to Ottumwa (Iowa) | 767.78 mi (1,235.62 km) |
| Port Neches to Overland (Missouri) | 635.97 mi (1,023.49 km) |
| Port Neches to Overland Park (Kansas) | 617.10 mi (993.12 km) |
| Port Neches to Overlea (Maryland) | 1,180.56 mi (1,899.93 km) |
| Port Neches to Oviedo (Florida) | 773.60 mi (1,244.99 km) |
| Port Neches to Owasso (Oklahoma) | 449.47 mi (723.36 km) |
| Port Neches to Owatonna (Minnesota) | 976.02 mi (1,570.75 km) |
| Port Neches to Owensboro (Kentucky) | 664.75 mi (1,069.82 km) |
| Port Neches to Owings Mills (Maryland) | 1,169.24 mi (1,881.71 km) |
