| Fort Collins to Cividale del Friuli | 5,352.40 mi (8,613.86 km) |
| Fort Collins to Civita Castellana | 5,509.30 mi (8,866.37 km) |
| Fort Collins to Civitanova Marche | 5,504.20 mi (8,858.15 km) |
| Fort Collins to Civitavecchia | 5,497.69 mi (8,847.68 km) |
| Fort Collins to Civitella in Val di Chiana | 5,428.98 mi (8,737.10 km) |
| Fort Collins to Clusone | 5,246.57 mi (8,443.54 km) |
| Fort Collins to Coccaglio | 5,263.12 mi (8,470.17 km) |
| Fort Collins to Codigoro | 5,372.03 mi (8,645.45 km) |
| Fort Collins to Codogno | 5,273.34 mi (8,486.62 km) |
| Fort Collins to Codroipo | 5,344.38 mi (8,600.95 km) |
| Fort Collins to Cogoleto | 5,273.64 mi (8,487.10 km) |
| Fort Collins to Colle di Val d'Elsa | 5,409.48 mi (8,705.72 km) |
| Fort Collins to Colle Salvetti | 5,376.83 mi (8,653.17 km) |
| Fort Collins to Collecchio | 5,311.06 mi (8,547.33 km) |
| Fort Collins to Colleferro | 5,558.98 mi (8,946.31 km) |
