| Niagara Falls to Sonneberg | 4,032.48 mi (6,489.65 km) |
| Niagara Falls to Sonsbeck | 3,808.22 mi (6,128.74 km) |
| Niagara Falls to Sonthofen | 4,100.30 mi (6,598.79 km) |
| Niagara Falls to Spaichingen | 4,019.00 mi (6,467.95 km) |
| Niagara Falls to Spelle | 3,825.12 mi (6,155.93 km) |
| Niagara Falls to Spenge | 3,870.66 mi (6,229.22 km) |
| Niagara Falls to Speyer | 3,963.46 mi (6,378.58 km) |
| Niagara Falls to Spiesen-Elversberg | 3,912.73 mi (6,296.93 km) |
| Niagara Falls to Spremberg | 4,107.47 mi (6,610.34 km) |
| Niagara Falls to Springe | 3,907.55 mi (6,288.59 km) |
| Niagara Falls to Sprockhovel | 3,849.25 mi (6,194.78 km) |
| Niagara Falls to Stade | 3,859.16 mi (6,210.72 km) |
| Niagara Falls to Stadtallendorf | 3,934.18 mi (6,331.45 km) |
| Niagara Falls to Stadthagen | 3,891.24 mi (6,262.35 km) |
| Niagara Falls to Stadtlohn | 3,816.38 mi (6,141.86 km) |
