| Keystone to Central Point (Oregon) | 2,449.81 mi (3,942.59 km) |
| Keystone to Centralia (Illinois) | 810.16 mi (1,303.82 km) |
| Keystone to Centralia (Washington) | 2,521.87 mi (4,058.56 km) |
| Keystone to Centreville (Virginia) | 796.99 mi (1,282.63 km) |
| Keystone to Ceres (California) | 2,302.78 mi (3,705.97 km) |
| Keystone to Cerritos (California) | 2,126.90 mi (3,422.91 km) |
| Keystone to Chalco (Nebraska) | 1,182.25 mi (1,902.65 km) |
| Keystone to Chalmette (Louisiana) | 462.16 mi (743.77 km) |
| Keystone to Chambersburg (Pennsylvania) | 862.68 mi (1,388.35 km) |
| Keystone to Chamblee (Georgia) | 410.03 mi (659.89 km) |
| Keystone to Champaign (Illinois) | 888.75 mi (1,430.30 km) |
| Keystone to Champlin (Minnesota) | 1,317.70 mi (2,120.63 km) |
| Keystone to Chandler (Arizona) | 1,767.68 mi (2,844.81 km) |
| Keystone to Chanhassen (Minnesota) | 1,303.27 mi (2,097.40 km) |
| Keystone to Channahon (Illinois) | 972.20 mi (1,564.61 km) |
