| Niagara Falls to San Lorenzo de Descardazar | 4,095.43 mi (6,590.96 km) |
| Niagara Falls to San Lorenzo de El Escorial | 3,723.87 mi (5,992.98 km) |
| Niagara Falls to San Martin de la Vega | 3,763.07 mi (6,056.07 km) |
| Niagara Falls to San Martin de Valdeiglesias | 3,719.79 mi (5,986.42 km) |
| Niagara Falls to San Pedro de Ribas | 3,967.63 mi (6,385.28 km) |
| Niagara Falls to San Roque | 3,819.12 mi (6,146.28 km) |
| Niagara Falls to San Sebastian de la Gomera | 3,545.25 mi (5,705.53 km) |
| Niagara Falls to San Sebastian de los Reyes | 3,749.10 mi (6,033.59 km) |
| Niagara Falls to San Vicente de Baracaldo | 3,686.35 mi (5,932.61 km) |
| Niagara Falls to San Vicente de Castellet | 3,957.17 mi (6,368.45 km) |
| Niagara Falls to San Vicente del Raspeig | 3,967.11 mi (6,384.45 km) |
| Niagara Falls to San Vicente dels Horts | 3,973.34 mi (6,394.47 km) |
| Niagara Falls to Sangenjo | 3,452.16 mi (5,555.71 km) |
| Niagara Falls to Sanlucar de Barrameda | 3,753.31 mi (6,040.36 km) |
| Niagara Falls to Sanlucar la Mayor | 3,738.66 mi (6,016.79 km) |
