| Keystone to South Plainfield (New Jersey) | 977.24 mi (1,572.71 km) |
| Keystone to South Portland (Maine) | 1,270.33 mi (2,044.39 km) |
| Keystone to South Riding (Virginia) | 800.06 mi (1,287.57 km) |
| Keystone to South River (New Jersey) | 970.59 mi (1,562.01 km) |
| Keystone to South Salt Lake (Utah) | 1,869.96 mi (3,009.40 km) |
| Keystone to South San Francisco (California) | 2,382.61 mi (3,834.45 km) |
| Keystone to South San Jose Hills (California) | 2,117.68 mi (3,408.08 km) |
| Keystone to South Sioux City (Nebraska) | 1,256.30 mi (2,021.82 km) |
| Keystone to South St. Paul (Minnesota) | 1,292.26 mi (2,079.69 km) |
| Keystone to South Valley (New Mexico) | 1,490.70 mi (2,399.05 km) |
| Keystone to South Venice (Florida) | 75.93 mi (122.21 km) |
| Keystone to South Whittier (California) | 2,124.83 mi (3,419.59 km) |
| Keystone to South Yarmouth (Massachusetts) | 1,167.19 mi (1,878.41 km) |
| Keystone to Southaven (Mississippi) | 640.55 mi (1,030.86 km) |
| Keystone to Southchase (Florida) | 75.59 mi (121.64 km) |
