| Niagara Falls to Ondokuzmayis | 5,337.60 mi (8,590.04 km) |
| Niagara Falls to Ordu | 5,426.71 mi (8,733.44 km) |
| Niagara Falls to Ortahisar | 5,439.66 mi (8,754.28 km) |
| Niagara Falls to Ortakent | 5,223.85 mi (8,406.97 km) |
| Niagara Falls to Ortaklar | 5,194.91 mi (8,360.40 km) |
| Niagara Falls to Ortakoy | 5,403.32 mi (8,695.81 km) |
| Niagara Falls to Ortakoy | 5,370.18 mi (8,642.46 km) |
| Niagara Falls to Osmaneli | 5,173.69 mi (8,326.24 km) |
| Niagara Falls to Osmaniye | 5,569.47 mi (8,963.19 km) |
| Niagara Falls to Ozdere | 5,173.83 mi (8,326.48 km) |
| Niagara Falls to Palu | 5,617.54 mi (9,040.55 km) |
| Niagara Falls to Pamukkale | 5,256.73 mi (8,459.90 km) |
| Niagara Falls to Patnos | 5,688.88 mi (9,155.36 km) |
| Niagara Falls to Pazar | 5,408.61 mi (8,704.32 km) |
| Niagara Falls to Pazarcik | 5,586.64 mi (8,990.82 km) |
