| Niagara Falls to Cuenca | 3,833.04 mi (6,168.69 km) |
| Niagara Falls to Cuevas del Almanzora | 3,945.08 mi (6,348.99 km) |
| Niagara Falls to Cullera | 3,951.77 mi (6,359.76 km) |
| Niagara Falls to Culleredo | 3,444.39 mi (5,543.21 km) |
| Niagara Falls to Cunit | 3,963.68 mi (6,378.92 km) |
| Niagara Falls to Daganzo de Arriba | 3,756.92 mi (6,046.18 km) |
| Niagara Falls to Daimiel | 3,799.97 mi (6,115.46 km) |
| Niagara Falls to Don Benito | 3,700.08 mi (5,954.70 km) |
| Niagara Falls to Donostia | 3,730.45 mi (6,003.58 km) |
| Niagara Falls to Dos Hermanas | 3,755.29 mi (6,043.56 km) |
| Niagara Falls to Durango | 3,706.59 mi (5,965.18 km) |
| Niagara Falls to Ecija | 3,786.03 mi (6,093.03 km) |
| Niagara Falls to Ejea de los Caballeros | 3,807.70 mi (6,127.90 km) |
| Niagara Falls to El Alamo | 3,742.98 mi (6,023.74 km) |
| Niagara Falls to El Arahal | 3,773.47 mi (6,072.82 km) |
