| Niagara Falls to Sabadell | 3,972.12 mi (6,392.51 km) |
| Niagara Falls to Sabinanigo | 3,828.79 mi (6,161.84 km) |
| Niagara Falls to Sagunto | 3,932.34 mi (6,328.48 km) |
| Niagara Falls to Salamanca | 3,641.76 mi (5,860.85 km) |
| Niagara Falls to Salobrena | 3,884.69 mi (6,251.80 km) |
| Niagara Falls to Salou | 3,945.48 mi (6,349.64 km) |
| Niagara Falls to Salt | 3,986.81 mi (6,416.15 km) |
| Niagara Falls to Salvatierra de Mino | 3,475.98 mi (5,594.05 km) |
| Niagara Falls to Sama | 3,566.09 mi (5,739.07 km) |
| Niagara Falls to San Adrian de Besos | 3,981.24 mi (6,407.19 km) |
| Niagara Falls to San Agustin de Guadalix | 3,745.14 mi (6,027.21 km) |
| Niagara Falls to San Andres de la Barca | 3,969.93 mi (6,388.99 km) |
| Niagara Falls to San Andres de Llevaneras | 3,987.81 mi (6,417.76 km) |
| Niagara Falls to San Andres del Rabanedo | 3,591.32 mi (5,779.68 km) |
| Niagara Falls to San Bartolome | 3,629.07 mi (5,840.43 km) |
