| Ontario to Stephenville (Texas) | 1,127.08 mi (1,813.86 km) |
| Ontario to Sterling (Colorado) | 911.46 mi (1,466.85 km) |
| Ontario to Sterling (Illinois) | 1,604.49 mi (2,582.17 km) |
| Ontario to Sterling (Virginia) | 2,240.04 mi (3,605.00 km) |
| Ontario to Sterling Heights (Michigan) | 1,949.80 mi (3,137.91 km) |
| Ontario to Steubenville (Ohio) | 2,064.47 mi (3,322.44 km) |
| Ontario to Stevens Point (Wisconsin) | 1,654.98 mi (2,663.44 km) |
| Ontario to Stevenson Ranch (California) | 61.09 mi (98.32 km) |
| Ontario to Stillwater (Minnesota) | 1,514.69 mi (2,437.66 km) |
| Ontario to Stillwater (Oklahoma) | 1,167.62 mi (1,879.10 km) |
| Ontario to Stockbridge (Georgia) | 1,908.49 mi (3,071.42 km) |
| Ontario to Stockton (California) | 341.80 mi (550.07 km) |
| Ontario to Stone Ridge (Virginia) | 2,232.33 mi (3,592.58 km) |
| Ontario to Stonecrest (Georgia) | 1,911.74 mi (3,076.66 km) |
| Ontario to Stony Brook (New York) | 2,457.66 mi (3,955.22 km) |
