| Fort Collins to Cernavoda | 5,889.45 mi (9,478.16 km) |
| Fort Collins to Chitila | 5,822.42 mi (9,370.28 km) |
| Fort Collins to Cisnadie | 5,702.70 mi (9,177.61 km) |
| Fort Collins to Cluj-Napoca | 5,628.09 mi (9,057.53 km) |
| Fort Collins to Codlea | 5,740.27 mi (9,238.07 km) |
| Fort Collins to Comanesti | 5,726.80 mi (9,216.40 km) |
| Fort Collins to Comarnic | 5,770.73 mi (9,287.09 km) |
| Fort Collins to Constanta | 5,915.75 mi (9,520.48 km) |
| Fort Collins to Corabia | 5,820.99 mi (9,367.98 km) |
| Fort Collins to Costesti | 5,781.84 mi (9,304.97 km) |
| Fort Collins to Covasna | 5,752.36 mi (9,257.53 km) |
| Fort Collins to Craiova | 5,769.64 mi (9,285.33 km) |
| Fort Collins to Cristuru Secuiesc | 5,695.45 mi (9,165.95 km) |
| Fort Collins to Cugir | 5,672.79 mi (9,129.47 km) |
| Fort Collins to Cumpana | 5,916.74 mi (9,522.07 km) |
