| Ontario to Shoreview (Minnesota) | 1,501.58 mi (2,416.56 km) |
| Ontario to Shorewood (Illinois) | 1,676.76 mi (2,698.49 km) |
| Ontario to Shorewood (Wisconsin) | 1,711.93 mi (2,755.08 km) |
| Ontario to Short Hills (New Jersey) | 2,395.68 mi (3,855.48 km) |
| Ontario to Short Pump (Virginia) | 2,236.43 mi (3,599.19 km) |
| Ontario to Show Low (Arizona) | 432.91 mi (696.69 km) |
| Ontario to Shreveport (Louisiana) | 1,376.99 mi (2,216.05 km) |
| Ontario to Sicklerville (New Jersey) | 2,364.95 mi (3,806.02 km) |
| Ontario to Sidney (Ohio) | 1,879.27 mi (3,024.39 km) |
| Ontario to Sierra Madre (California) | 26.93 mi (43.34 km) |
| Ontario to Sierra Vista (Arizona) | 456.56 mi (734.76 km) |
| Ontario to Sierra Vista Southeast (Arizona) | 465.03 mi (748.39 km) |
| Ontario to Signal Hill (California) | 36.11 mi (58.11 km) |
| Ontario to Sikeston (Missouri) | 1,583.27 mi (2,548.02 km) |
| Ontario to Siloam Springs (Arkansas) | 1,309.48 mi (2,107.41 km) |
