| Helena to Butzbach | 4,858.61 mi (7,819.18 km) |
| Helena to Buxtehude | 4,722.95 mi (7,600.86 km) |
| Helena to Cadolzburg | 4,972.75 mi (8,002.86 km) |
| Helena to Calbe | 4,862.11 mi (7,824.81 km) |
| Helena to Calw | 4,953.39 mi (7,971.72 km) |
| Helena to Castrop-Rauxel | 4,762.04 mi (7,663.76 km) |
| Helena to Celle | 4,778.74 mi (7,690.64 km) |
| Helena to Cham | 5,033.76 mi (8,101.05 km) |
| Helena to Chemnitz | 4,950.78 mi (7,967.52 km) |
| Helena to Clausthal-Zellerfeld | 4,829.86 mi (7,772.90 km) |
| Helena to Cloppenburg | 4,713.02 mi (7,584.87 km) |
| Helena to Coburg | 4,930.63 mi (7,935.08 km) |
| Helena to Coesfeld | 4,736.75 mi (7,623.06 km) |
| Helena to Cologne | 4,784.42 mi (7,699.77 km) |
| Helena to Coswig | 4,951.20 mi (7,968.19 km) |
