| Opfikon to Carson (California) | 5,927.75 mi (9,539.79 km) |
| Opfikon to Carson City (Nevada) | 5,663.25 mi (9,114.12 km) |
| Opfikon to Carteret (New Jersey) | 3,943.35 mi (6,346.21 km) |
| Opfikon to Cartersville (Georgia) | 4,672.24 mi (7,519.25 km) |
| Opfikon to Carthage (Missouri) | 4,910.08 mi (7,902.02 km) |
| Opfikon to Cary (Illinois) | 4,435.15 mi (7,137.68 km) |
| Opfikon to Cary (North Carolina) | 4,345.49 mi (6,993.39 km) |
| Opfikon to Casa de Oro-Mount Helix (California) | 5,949.13 mi (9,574.20 km) |
| Opfikon to Casa Grande (Arizona) | 5,768.75 mi (9,283.90 km) |
| Opfikon to Casas Adobes (Arizona) | 5,774.47 mi (9,293.11 km) |
| Opfikon to Cascades (Virginia) | 4,140.94 mi (6,664.20 km) |
| Opfikon to Casper (Wyoming) | 5,045.08 mi (8,119.27 km) |
| Opfikon to Casselberry (Florida) | 4,784.20 mi (7,699.42 km) |
| Opfikon to Castaic (California) | 5,901.96 mi (9,498.29 km) |
| Opfikon to Castle Pines (Colorado) | 5,175.63 mi (8,329.37 km) |
