| Niagara Falls to Spello | 4,370.14 mi (7,033.06 km) |
| Niagara Falls to Spilamberto | 4,241.66 mi (6,826.29 km) |
| Niagara Falls to Spilimbergo | 4,255.73 mi (6,848.94 km) |
| Niagara Falls to Spinea | 4,251.23 mi (6,841.70 km) |
| Niagara Falls to Spoleto | 4,379.95 mi (7,048.85 km) |
| Niagara Falls to Spoltore | 4,452.18 mi (7,165.09 km) |
| Niagara Falls to Spresiano | 4,243.67 mi (6,829.52 km) |
| Niagara Falls to Squinzano | 4,697.87 mi (7,560.50 km) |
| Niagara Falls to Statte | 4,657.14 mi (7,494.94 km) |
| Niagara Falls to Stezzano | 4,143.76 mi (6,668.73 km) |
| Niagara Falls to Strada | 4,290.71 mi (6,905.23 km) |
| Niagara Falls to Stradella | 4,150.43 mi (6,679.47 km) |
| Niagara Falls to Striano | 4,537.20 mi (7,301.92 km) |
| Niagara Falls to Subiaco | 4,430.23 mi (7,129.77 km) |
| Niagara Falls to Sulmona | 4,459.92 mi (7,177.55 km) |
