| Niksar to Opole | 1,148.14 mi (1,847.75 km) |
| Niksar to Orzesze | 1,099.14 mi (1,768.90 km) |
| Niksar to Osowa | 1,280.64 mi (2,060.98 km) |
| Niksar to Ostroda | 1,201.91 mi (1,934.29 km) |
| Niksar to Ostroleka | 1,123.84 mi (1,808.65 km) |
| Niksar to Ostrow Mazowiecka | 1,101.06 mi (1,771.98 km) |
| Niksar to Ostrow Wielkopolski | 1,187.72 mi (1,911.45 km) |
| Niksar to Ostrowiec Swietokrzyski | 1,032.63 mi (1,661.86 km) |
| Niksar to Ostrzeszow | 1,174.88 mi (1,890.78 km) |
| Niksar to Oswiecim | 1,077.20 mi (1,733.59 km) |
| Niksar to Otwock | 1,088.89 mi (1,752.39 km) |
| Niksar to Ozarow Mazowiecki | 1,108.42 mi (1,783.83 km) |
| Niksar to Ozimek | 1,137.78 mi (1,831.07 km) |
| Niksar to Ozorkow | 1,148.38 mi (1,848.14 km) |
| Niksar to Pabianice | 1,132.09 mi (1,821.92 km) |
