| Opfikon to Kinston (North Carolina) | 4,315.87 mi (6,945.72 km) |
| Opfikon to Kirkland (Washington) | 5,228.81 mi (8,414.96 km) |
| Opfikon to Kirksville (Missouri) | 4,694.46 mi (7,555.00 km) |
| Opfikon to Kirkwood (Missouri) | 4,689.56 mi (7,547.12 km) |
| Opfikon to Kiryas Joel (New York) | 3,909.54 mi (6,291.80 km) |
| Opfikon to Kissimmee (Florida) | 4,805.49 mi (7,733.69 km) |
| Opfikon to Klamath Falls (Oregon) | 5,539.70 mi (8,915.28 km) |
| Opfikon to Knightdale (North Carolina) | 4,331.33 mi (6,970.60 km) |
| Opfikon to Knik-Fairview (Alaska) | 4,812.59 mi (7,745.12 km) |
| Opfikon to Knoxville (Tennessee) | 4,552.33 mi (7,326.27 km) |
| Opfikon to Kokomo (Indiana) | 4,433.11 mi (7,134.40 km) |
| Opfikon to Kuna (Idaho) | 5,317.39 mi (8,557.52 km) |
| Opfikon to Kyle (Texas) | 5,412.19 mi (8,710.07 km) |
| Opfikon to La Cañada Flintridge (California) | 5,904.42 mi (9,502.24 km) |
| Opfikon to La Crescenta-Montrose (California) | 5,904.20 mi (9,501.90 km) |
