| Niagara Falls to Irun | 3,738.31 mi (6,016.23 km) |
| Niagara Falls to Isla-Cristina | 3,691.95 mi (5,941.62 km) |
| Niagara Falls to Jaca | 3,819.49 mi (6,146.88 km) |
| Niagara Falls to Jaen | 3,839.29 mi (6,178.74 km) |
| Niagara Falls to Jerez de la Frontera | 3,766.41 mi (6,061.44 km) |
| Niagara Falls to Jerez de los Caballeros | 3,679.17 mi (5,921.04 km) |
| Niagara Falls to Jodar | 3,856.58 mi (6,206.57 km) |
| Niagara Falls to Jumilla | 3,927.28 mi (6,320.35 km) |
| Niagara Falls to La Algaba | 3,745.76 mi (6,028.21 km) |
| Niagara Falls to La Baneza | 3,587.81 mi (5,774.02 km) |
| Niagara Falls to La Carlota | 3,788.36 mi (6,096.78 km) |
| Niagara Falls to La Carolina | 3,828.71 mi (6,161.71 km) |
| Niagara Falls to La Corredoria | 3,557.27 mi (5,724.87 km) |
| Niagara Falls to La Eliana | 3,924.69 mi (6,316.18 km) |
| Niagara Falls to La Escala | 3,997.09 mi (6,432.70 km) |
