| Johnstown to Cognac | 3,824.81 mi (6,155.44 km) |
| Johnstown to Cogolin | 4,202.59 mi (6,763.41 km) |
| Johnstown to Colmar | 4,078.43 mi (6,563.59 km) |
| Johnstown to Colombes | 3,842.80 mi (6,184.39 km) |
| Johnstown to Colomiers | 3,961.08 mi (6,374.74 km) |
| Johnstown to Combs-la-Ville | 3,862.78 mi (6,216.54 km) |
| Johnstown to Comines | 3,822.50 mi (6,151.72 km) |
| Johnstown to Compiegne | 3,852.48 mi (6,199.96 km) |
| Johnstown to Concarneau | 3,609.62 mi (5,809.13 km) |
| Johnstown to Conde-sur-l'Escaut | 3,854.56 mi (6,203.31 km) |
| Johnstown to Conflans-Sainte-Honorine | 3,834.30 mi (6,170.71 km) |
| Johnstown to Corbas | 4,052.44 mi (6,521.77 km) |
| Johnstown to Corbeil-Essonnes | 3,861.14 mi (6,213.90 km) |
| Johnstown to Cormeilles-en-Parisis | 3,839.28 mi (6,178.73 km) |
| Johnstown to Cosne sur Loire | 3,914.74 mi (6,300.16 km) |
