| Duffel to Kenosha (Wisconsin) | 4,112.02 mi (6,617.66 km) |
| Duffel to Kent (Ohio) | 3,931.46 mi (6,327.08 km) |
| Duffel to Kent (Washington) | 4,935.15 mi (7,942.36 km) |
| Duffel to Kentwood (Michigan) | 4,012.91 mi (6,458.15 km) |
| Duffel to Kerman (California) | 5,503.09 mi (8,856.36 km) |
| Duffel to Kernersville (North Carolina) | 4,116.52 mi (6,624.90 km) |
| Duffel to Kerrville (Texas) | 5,171.77 mi (8,323.16 km) |
| Duffel to Kettering (Maryland) | 3,853.53 mi (6,201.65 km) |
| Duffel to Kettering (Ohio) | 4,107.47 mi (6,610.33 km) |
| Duffel to Kewanee (Illinois) | 4,252.44 mi (6,843.64 km) |
| Duffel to Key Biscayne (Florida) | 4,633.13 mi (7,456.31 km) |
| Duffel to Key Largo (Florida) | 4,672.45 mi (7,519.58 km) |
| Duffel to Key West (Florida) | 4,758.65 mi (7,658.31 km) |
| Duffel to Keystone (Florida) | 4,611.77 mi (7,421.92 km) |
| Duffel to Kihei (Hawaii) | 7,338.30 mi (11,809.86 km) |
