| Helena to Crawfordsville (Indiana) | 1,334.68 mi (2,147.96 km) |
| Helena to Crest Hill (Illinois) | 1,230.87 mi (1,980.90 km) |
| Helena to Crestview (Florida) | 1,742.18 mi (2,803.76 km) |
| Helena to Crestwood (Illinois) | 1,246.34 mi (2,005.79 km) |
| Helena to Crestwood (Missouri) | 1,227.73 mi (1,975.84 km) |
| Helena to Creve Coeur (Missouri) | 1,220.79 mi (1,964.68 km) |
| Helena to Crofton (Maryland) | 1,849.14 mi (2,975.90 km) |
| Helena to Crossville (Tennessee) | 1,571.79 mi (2,529.55 km) |
| Helena to Crowley (Louisiana) | 1,544.46 mi (2,485.57 km) |
| Helena to Crowley (Texas) | 1,239.74 mi (1,995.17 km) |
| Helena to Crown Point (Indiana) | 1,271.50 mi (2,046.28 km) |
| Helena to Crystal (Minnesota) | 902.86 mi (1,453.01 km) |
| Helena to Crystal Lake (Illinois) | 1,202.13 mi (1,934.64 km) |
| Helena to Cudahy (California) | 930.62 mi (1,497.69 km) |
| Helena to Cudahy (Wisconsin) | 1,206.34 mi (1,941.42 km) |
