| Opfikon to Kaneohe (Hawaii) | 7,605.29 mi (12,239.53 km) |
| Opfikon to Kankakee (Illinois) | 4,471.57 mi (7,196.29 km) |
| Opfikon to Kannapolis (North Carolina) | 4,436.57 mi (7,139.96 km) |
| Opfikon to Kansas City (Kansas) | 4,828.62 mi (7,770.91 km) |
| Opfikon to Kansas City (Missouri) | 4,821.45 mi (7,759.38 km) |
| Opfikon to Kapaa (Hawaii) | 7,574.63 mi (12,190.19 km) |
| Opfikon to Kapolei (Hawaii) | 7,612.80 mi (12,251.62 km) |
| Opfikon to Katy (Texas) | 5,340.71 mi (8,595.04 km) |
| Opfikon to Kaukauna (Wisconsin) | 4,341.44 mi (6,986.87 km) |
| Opfikon to Kaysville (Utah) | 5,322.53 mi (8,565.79 km) |
| Opfikon to Kearney (Missouri) | 4,802.79 mi (7,729.34 km) |
| Opfikon to Kearney (Nebraska) | 4,908.91 mi (7,900.12 km) |
| Opfikon to Kearns (Utah) | 5,345.42 mi (8,602.63 km) |
| Opfikon to Kearny (New Jersey) | 3,931.86 mi (6,327.72 km) |
| Opfikon to Keene (New Hampshire) | 3,767.04 mi (6,062.46 km) |
