| Helena to Castelfidardo | 5,382.03 mi (8,661.53 km) |
| Helena to Castelfiorentino | 5,299.20 mi (8,528.23 km) |
| Helena to Castelfranco di Sopra | 5,315.34 mi (8,554.22 km) |
| Helena to Castelfranco di Sotto | 5,287.21 mi (8,508.94 km) |
| Helena to Castelfranco Emilia | 5,246.28 mi (8,443.07 km) |
| Helena to Castelfranco Veneto | 5,212.03 mi (8,387.95 km) |
| Helena to Castellabate | 5,604.61 mi (9,019.75 km) |
| Helena to Castellammare del Golfo | 5,670.86 mi (9,126.37 km) |
| Helena to Castellammare di Stabia | 5,566.92 mi (8,959.08 km) |
| Helena to Castellamonte | 5,104.03 mi (8,214.14 km) |
| Helena to Castellana Grotte | 5,633.22 mi (9,065.78 km) |
| Helena to Castellaneta | 5,641.17 mi (9,078.59 km) |
| Helena to Castellanza | 5,126.75 mi (8,250.71 km) |
| Helena to Castellarano | 5,240.06 mi (8,433.06 km) |
| Helena to Castelleone | 5,169.75 mi (8,319.90 km) |
