| Port Neches to Opole | 5,494.43 mi (8,842.43 km) |
| Port Neches to Orzesze | 5,544.44 mi (8,922.91 km) |
| Port Neches to Osowa | 5,363.67 mi (8,631.99 km) |
| Port Neches to Ostroda | 5,442.23 mi (8,758.42 km) |
| Port Neches to Ostroleka | 5,521.24 mi (8,885.57 km) |
| Port Neches to Ostrow Mazowiecka | 5,543.47 mi (8,921.36 km) |
| Port Neches to Ostrow Wielkopolski | 5,451.29 mi (8,773.00 km) |
| Port Neches to Ostrowiec Swietokrzyski | 5,605.38 mi (9,020.99 km) |
| Port Neches to Ostrzeszow | 5,464.63 mi (8,794.47 km) |
| Port Neches to Oswiecim | 5,565.89 mi (8,957.43 km) |
| Port Neches to Otwock | 5,551.09 mi (8,933.62 km) |
| Port Neches to Ozarow Mazowiecki | 5,531.16 mi (8,901.54 km) |
| Port Neches to Ozimek | 5,504.18 mi (8,858.12 km) |
| Port Neches to Ozorkow | 5,489.64 mi (8,834.72 km) |
| Port Neches to Pabianice | 5,505.96 mi (8,860.98 km) |
