| Keystone to Security-Widefield (Colorado) | 1,465.23 mi (2,358.06 km) |
| Keystone to Sedalia (Missouri) | 952.44 mi (1,532.80 km) |
| Keystone to Sedro-Woolley (Washington) | 2,526.78 mi (4,066.45 km) |
| Keystone to Seguin (Texas) | 934.67 mi (1,504.21 km) |
| Keystone to Selden (New York) | 1,033.24 mi (1,662.84 km) |
| Keystone to Selma (Alabama) | 396.97 mi (638.87 km) |
| Keystone to Selma (California) | 2,222.92 mi (3,577.44 km) |
| Keystone to Selma (Texas) | 955.41 mi (1,537.59 km) |
| Keystone to Seminole (Florida) | 22.83 mi (36.74 km) |
| Keystone to Seven Hills (Ohio) | 916.92 mi (1,475.63 km) |
| Keystone to Seven Oaks (South Carolina) | 417.74 mi (672.29 km) |
| Keystone to Severn (Maryland) | 832.23 mi (1,339.34 km) |
| Keystone to Severna Park (Maryland) | 832.20 mi (1,339.30 km) |
| Keystone to Sevierville (Tennessee) | 538.87 mi (867.23 km) |
| Keystone to Seymour (Indiana) | 770.84 mi (1,240.55 km) |
