| Niagara Falls to Islahiye | 5,586.20 mi (8,990.13 km) |
| Niagara Falls to Isparta | 5,319.96 mi (8,561.64 km) |
| Niagara Falls to Istanbul | 5,101.82 mi (8,210.59 km) |
| Niagara Falls to Izmir | 5,155.20 mi (8,296.50 km) |
| Niagara Falls to Kadinhani | 5,359.78 mi (8,625.74 km) |
| Niagara Falls to Kadirli | 5,548.82 mi (8,929.97 km) |
| Niagara Falls to Kagithane | 5,099.47 mi (8,206.80 km) |
| Niagara Falls to Kahramanmaras | 5,568.38 mi (8,961.43 km) |
| Niagara Falls to Kahta | 5,619.09 mi (9,043.05 km) |
| Niagara Falls to Kaman | 5,360.60 mi (8,627.06 km) |
| Niagara Falls to Kangal | 5,499.49 mi (8,850.57 km) |
| Niagara Falls to Kapakli | 5,049.30 mi (8,126.06 km) |
| Niagara Falls to Karaagac | 5,591.24 mi (8,998.23 km) |
| Niagara Falls to Karaagac | 5,050.24 mi (8,127.57 km) |
| Niagara Falls to Karabuk | 5,228.94 mi (8,415.17 km) |
