| Port Neches to McHenry (Illinois) | 909.93 mi (1,464.39 km) |
| Port Neches to McKeesport (Pennsylvania) | 1,068.67 mi (1,719.87 km) |
| Port Neches to McKinleyville (California) | 1,845.73 mi (2,970.41 km) |
| Port Neches to McKinney (Texas) | 274.39 mi (441.58 km) |
| Port Neches to McLean (Virginia) | 1,134.90 mi (1,826.45 km) |
| Port Neches to McMinnville (Oregon) | 1,899.56 mi (3,057.05 km) |
| Port Neches to McMinnville (Tennessee) | 616.28 mi (991.81 km) |
| Port Neches to McNair (Virginia) | 1,124.87 mi (1,810.30 km) |
| Port Neches to McPherson (Kansas) | 617.52 mi (993.80 km) |
| Port Neches to Mead Valley (California) | 1,391.49 mi (2,239.38 km) |
| Port Neches to Meadow Woods (Florida) | 767.75 mi (1,235.57 km) |
| Port Neches to Meadowbrook (Virginia) | 1,075.55 mi (1,730.92 km) |
| Port Neches to Meadville (Pennsylvania) | 1,114.34 mi (1,793.36 km) |
| Port Neches to Mebane (North Carolina) | 947.50 mi (1,524.86 km) |
| Port Neches to Mechanicsville (Virginia) | 1,086.96 mi (1,749.29 km) |
