| Johnston to Collegno | 4,727.98 mi (7,608.95 km) |
| Johnston to Cologno al Serio | 4,787.02 mi (7,703.97 km) |
| Johnston to Cologno Monzese | 4,773.53 mi (7,682.26 km) |
| Johnston to Colorno | 4,841.19 mi (7,791.15 km) |
| Johnston to Comacchio | 4,919.03 mi (7,916.42 km) |
| Johnston to Comiso | 5,371.92 mi (8,645.26 km) |
| Johnston to Como | 4,754.11 mi (7,651.01 km) |
| Johnston to Concordia Sagittaria | 4,895.56 mi (7,878.65 km) |
| Johnston to Concorezzo | 4,773.05 mi (7,681.49 km) |
| Johnston to Conegliano | 4,869.96 mi (7,837.44 km) |
| Johnston to Conselice | 4,914.20 mi (7,908.63 km) |
| Johnston to Conselve | 4,883.33 mi (7,858.97 km) |
| Johnston to Conversano | 5,277.42 mi (8,493.19 km) |
| Johnston to Copertino | 5,346.23 mi (8,603.93 km) |
| Johnston to Copparo | 4,897.01 mi (7,880.98 km) |
