| Niagara Falls to Iver | 3,543.98 mi (5,703.48 km) |
| Niagara Falls to Ivybridge | 3,437.63 mi (5,532.33 km) |
| Niagara Falls to Jarrow | 3,417.15 mi (5,499.37 km) |
| Niagara Falls to Johnstone | 3,286.27 mi (5,288.73 km) |
| Niagara Falls to Kearsley | 3,419.06 mi (5,502.45 km) |
| Niagara Falls to Keighley | 3,428.32 mi (5,517.36 km) |
| Niagara Falls to Kempston | 3,528.17 mi (5,678.05 km) |
| Niagara Falls to Kendal | 3,385.60 mi (5,448.59 km) |
| Niagara Falls to Kenilworth | 3,480.38 mi (5,601.13 km) |
| Niagara Falls to Kenley | 3,565.62 mi (5,738.31 km) |
| Niagara Falls to Kensington | 3,557.05 mi (5,724.52 km) |
| Niagara Falls to Kenton | 3,549.95 mi (5,713.09 km) |
| Niagara Falls to Kettering | 3,511.87 mi (5,651.81 km) |
| Niagara Falls to Kew Green | 3,554.83 mi (5,720.94 km) |
| Niagara Falls to Keynsham | 3,468.02 mi (5,581.23 km) |
