| Opfikon to Castle Rock (Colorado) | 5,179.60 mi (8,335.77 km) |
| Opfikon to Castro Valley (California) | 5,813.91 mi (9,356.58 km) |
| Opfikon to Catalina Foothills (Arizona) | 5,772.16 mi (9,289.39 km) |
| Opfikon to Cataño (Puerto Rico) | 4,580.02 mi (7,370.83 km) |
| Opfikon to Cathedral City (California) | 5,871.31 mi (9,448.96 km) |
| Opfikon to Catonsville (Maryland) | 4,104.53 mi (6,605.60 km) |
| Opfikon to Cave Spring (Virginia) | 4,330.83 mi (6,969.79 km) |
| Opfikon to Cayce (South Carolina) | 4,523.90 mi (7,280.51 km) |
| Opfikon to Cayey (Puerto Rico) | 4,596.55 mi (7,397.44 km) |
| Opfikon to Cedar City (Utah) | 5,545.31 mi (8,924.31 km) |
| Opfikon to Cedar Falls (Iowa) | 4,578.74 mi (7,368.77 km) |
| Opfikon to Cedar Hill (Texas) | 5,242.52 mi (8,437.02 km) |
| Opfikon to Cedar Lake (Indiana) | 4,442.77 mi (7,149.94 km) |
| Opfikon to Cedar Mill (Oregon) | 5,370.80 mi (8,643.46 km) |
| Opfikon to Cedar Park (Texas) | 5,382.84 mi (8,662.84 km) |
