| Johnston to Cortona | 4,975.97 mi (8,008.05 km) |
| Johnston to Cosenza | 5,324.53 mi (8,569.00 km) |
| Johnston to Cossato | 4,729.82 mi (7,611.90 km) |
| Johnston to Costa Volpino | 4,791.18 mi (7,710.66 km) |
| Johnston to Creazzo | 4,855.74 mi (7,814.56 km) |
| Johnston to Crema | 4,795.83 mi (7,718.14 km) |
| Johnston to Cremona | 4,819.22 mi (7,755.78 km) |
| Johnston to Crevalcore | 4,879.63 mi (7,853.00 km) |
| Johnston to Crispiano | 5,299.45 mi (8,528.64 km) |
| Johnston to Crosia | 5,331.53 mi (8,580.27 km) |
| Johnston to Crotone | 5,368.25 mi (8,639.36 km) |
| Johnston to Cuneo | 4,756.75 mi (7,655.25 km) |
| Johnston to Cuorgne | 4,717.66 mi (7,592.34 km) |
| Johnston to Cusano Milanino | 4,769.02 mi (7,675.00 km) |
| Johnston to Cutro | 5,365.54 mi (8,635.00 km) |
