| Port Neches to Noventa Vicentina | 5,452.03 mi (8,774.19 km) |
| Port Neches to Novi di Modena | 5,439.84 mi (8,754.57 km) |
| Port Neches to Novi Ligure | 5,355.46 mi (8,618.78 km) |
| Port Neches to Nuoro | 5,535.83 mi (8,909.06 km) |
| Port Neches to Occhiobello | 5,467.17 mi (8,798.56 km) |
| Port Neches to Oderzo | 5,473.22 mi (8,808.29 km) |
| Port Neches to Oggiono | 5,343.65 mi (8,599.78 km) |
| Port Neches to Olbia | 5,521.87 mi (8,886.58 km) |
| Port Neches to Oleggio | 5,320.04 mi (8,561.77 km) |
| Port Neches to Olgiate Comasco | 5,327.67 mi (8,574.06 km) |
| Port Neches to Olgiate Olona | 5,329.37 mi (8,576.79 km) |
| Port Neches to Omegna | 5,301.03 mi (8,531.19 km) |
| Port Neches to Opera | 5,351.99 mi (8,613.20 km) |
| Port Neches to Oppeano | 5,436.93 mi (8,749.90 km) |
| Port Neches to Orbassano | 5,293.85 mi (8,519.64 km) |
