| Duchcov to Carson (California) | 5,911.11 mi (9,513.00 km) |
| Duchcov to Carson City (Nevada) | 5,625.75 mi (9,053.76 km) |
| Duchcov to Carteret (New Jersey) | 4,054.56 mi (6,525.18 km) |
| Duchcov to Cartersville (Georgia) | 4,777.83 mi (7,689.17 km) |
| Duchcov to Carthage (Missouri) | 4,971.52 mi (8,000.89 km) |
| Duchcov to Cary (Illinois) | 4,495.87 mi (7,235.40 km) |
| Duchcov to Cary (North Carolina) | 4,464.05 mi (7,184.19 km) |
| Duchcov to Casa de Oro-Mount Helix (California) | 5,940.76 mi (9,560.72 km) |
| Duchcov to Casa Grande (Arizona) | 5,780.70 mi (9,303.14 km) |
| Duchcov to Casas Adobes (Arizona) | 5,791.15 mi (9,319.96 km) |
| Duchcov to Cascades (Virginia) | 4,249.70 mi (6,839.23 km) |
| Duchcov to Casper (Wyoming) | 5,044.04 mi (8,117.60 km) |
| Duchcov to Casselberry (Florida) | 4,922.80 mi (7,922.47 km) |
| Duchcov to Castaic (California) | 5,881.98 mi (9,466.14 km) |
| Duchcov to Castle Pines (Colorado) | 5,191.62 mi (8,355.10 km) |
