| Niksar to Olivares | 2,302.38 mi (3,705.33 km) |
| Niksar to Olivenza | 2,323.95 mi (3,740.03 km) |
| Niksar to Olot | 1,778.61 mi (2,862.39 km) |
| Niksar to Onate | 2,016.69 mi (3,245.55 km) |
| Niksar to Onda | 1,948.35 mi (3,135.56 km) |
| Niksar to Onteniente | 1,985.90 mi (3,196.00 km) |
| Niksar to Orihuela | 2,017.83 mi (3,247.38 km) |
| Niksar to Osuna | 2,252.03 mi (3,624.29 km) |
| Niksar to Ourense | 2,297.40 mi (3,697.32 km) |
| Niksar to Oviedo | 2,183.38 mi (3,513.81 km) |
| Niksar to Paiporta | 1,965.25 mi (3,162.76 km) |
| Niksar to Pajara | 2,985.02 mi (4,803.93 km) |
| Niksar to Palafolls | 1,770.63 mi (2,849.56 km) |
| Niksar to Palafrugell | 1,747.02 mi (2,811.56 km) |
| Niksar to Palamos | 1,749.49 mi (2,815.53 km) |
