| Niagara Falls to Krosno Odrzanskie | 4,116.48 mi (6,624.83 km) |
| Niagara Falls to Krotoszyn | 4,213.07 mi (6,780.28 km) |
| Niagara Falls to Kruszwica | 4,206.19 mi (6,769.21 km) |
| Niagara Falls to Krynica | 4,430.00 mi (7,129.39 km) |
| Niagara Falls to Krzeszowice | 4,352.94 mi (7,005.38 km) |
| Niagara Falls to Kudowa-Zdroj | 4,217.93 mi (6,788.10 km) |
| Niagara Falls to Kutno | 4,259.56 mi (6,855.11 km) |
| Niagara Falls to Kwidzyn | 4,186.02 mi (6,736.75 km) |
| Niagara Falls to Lancut | 4,448.14 mi (7,158.59 km) |
| Niagara Falls to Lapy | 4,349.09 mi (6,999.18 km) |
| Niagara Falls to Lask | 4,276.82 mi (6,882.88 km) |
| Niagara Falls to Laziska Gorne | 4,324.08 mi (6,958.94 km) |
| Niagara Falls to Lebork | 4,115.19 mi (6,622.76 km) |
| Niagara Falls to Leczna | 4,419.05 mi (7,111.77 km) |
| Niagara Falls to Leczyca | 4,260.99 mi (6,857.40 km) |
