| Niagara Falls to Santa Ursula | 3,563.37 mi (5,734.69 km) |
| Niagara Falls to Santander | 3,644.88 mi (5,865.87 km) |
| Niagara Falls to Santany | 4,097.90 mi (6,594.93 km) |
| Niagara Falls to Santiago de Compostela | 3,449.69 mi (5,551.74 km) |
| Niagara Falls to Santiago del Teide | 3,552.18 mi (5,716.69 km) |
| Niagara Falls to Santiponce | 3,744.23 mi (6,025.75 km) |
| Niagara Falls to Santomera | 3,955.17 mi (6,365.24 km) |
| Niagara Falls to Santona | 3,661.01 mi (5,891.83 km) |
| Niagara Falls to Santurce-Antiguo | 3,683.52 mi (5,928.05 km) |
| Niagara Falls to Sarria | 3,503.85 mi (5,638.89 km) |
| Niagara Falls to Sauzal | 3,564.07 mi (5,735.81 km) |
| Niagara Falls to Sedavi | 3,936.21 mi (6,334.71 km) |
| Niagara Falls to Segorbe | 3,916.23 mi (6,302.56 km) |
| Niagara Falls to Segovia | 3,713.06 mi (5,975.59 km) |
| Niagara Falls to Senmanat | 3,971.21 mi (6,391.05 km) |
