| Helena to Cavdir | 6,183.00 mi (9,950.57 km) |
| Helena to Cay | 6,123.34 mi (9,854.56 km) |
| Helena to Caybasi | 6,091.23 mi (9,802.88 km) |
| Helena to Caycuma | 5,967.26 mi (9,603.38 km) |
| Helena to Cayeli | 6,150.69 mi (9,898.58 km) |
| Helena to Cayiralan | 6,174.94 mi (9,937.61 km) |
| Helena to Cayirhan | 6,042.73 mi (9,724.83 km) |
| Helena to Cayirli | 6,223.19 mi (10,015.25 km) |
| Helena to Cayirova | 5,946.35 mi (9,569.73 km) |
| Helena to Caykara | 6,165.03 mi (9,921.65 km) |
| Helena to Cekerek | 6,122.67 mi (9,853.48 km) |
| Helena to Cekme | 5,928.83 mi (9,541.53 km) |
| Helena to Celtik | 6,112.95 mi (9,837.84 km) |
| Helena to Cerkes | 6,023.03 mi (9,693.12 km) |
| Helena to Cerkezkoy | 5,886.70 mi (9,473.73 km) |
