| Niles to Opole | 4,632.02 mi (7,454.52 km) |
| Niles to Orzesze | 4,682.47 mi (7,535.71 km) |
| Niles to Osowa | 4,487.63 mi (7,222.14 km) |
| Niles to Ostroda | 4,566.38 mi (7,348.88 km) |
| Niles to Ostroleka | 4,645.03 mi (7,475.45 km) |
| Niles to Ostrow Mazowiecka | 4,667.56 mi (7,511.72 km) |
| Niles to Ostrow Wielkopolski | 4,585.48 mi (7,379.61 km) |
| Niles to Ostrowiec Swietokrzyski | 4,736.01 mi (7,621.87 km) |
| Niles to Ostrzeszow | 4,599.46 mi (7,402.11 km) |
| Niles to Oswiecim | 4,703.46 mi (7,569.50 km) |
| Niles to Otwock | 4,678.17 mi (7,528.79 km) |
| Niles to Ozarow Mazowiecki | 4,658.64 mi (7,497.36 km) |
| Niles to Ozimek | 4,641.25 mi (7,469.37 km) |
| Niles to Ozorkow | 4,620.32 mi (7,435.69 km) |
| Niles to Pabianice | 4,637.55 mi (7,463.41 km) |
