| Keystone to Stephenville (Texas) | 973.69 mi (1,567.00 km) |
| Keystone to Sterling (Colorado) | 1,451.11 mi (2,335.34 km) |
| Keystone to Sterling (Illinois) | 1,025.35 mi (1,650.14 km) |
| Keystone to Sterling (Virginia) | 808.26 mi (1,300.77 km) |
| Keystone to Sterling Heights (Michigan) | 998.67 mi (1,607.20 km) |
| Keystone to Steubenville (Ohio) | 852.52 mi (1,372.00 km) |
| Keystone to Stevens Point (Wisconsin) | 1,195.75 mi (1,924.37 km) |
| Keystone to Stevenson Ranch (California) | 2,157.41 mi (3,472.01 km) |
| Keystone to Stillwater (Minnesota) | 1,297.41 mi (2,087.97 km) |
| Keystone to Stillwater (Oklahoma) | 1,009.54 mi (1,624.69 km) |
| Keystone to Stockbridge (Georgia) | 385.02 mi (619.63 km) |
| Keystone to Stockton (California) | 2,324.14 mi (3,740.34 km) |
| Keystone to Stone Ridge (Virginia) | 800.28 mi (1,287.93 km) |
| Keystone to Stonecrest (Georgia) | 394.33 mi (634.62 km) |
| Keystone to Stony Brook (New York) | 1,032.83 mi (1,662.17 km) |
