| Duffel to Kinston (North Carolina) | 4,054.47 mi (6,525.03 km) |
| Duffel to Kirkland (Washington) | 4,916.93 mi (7,913.04 km) |
| Duffel to Kirksville (Missouri) | 4,401.16 mi (7,082.98 km) |
| Duffel to Kirkwood (Missouri) | 4,401.31 mi (7,083.22 km) |
| Duffel to Kiryas Joel (New York) | 3,638.28 mi (5,855.25 km) |
| Duffel to Kissimmee (Florida) | 4,553.76 mi (7,328.58 km) |
| Duffel to Klamath Falls (Oregon) | 5,227.53 mi (8,412.90 km) |
| Duffel to Knightdale (North Carolina) | 4,066.97 mi (6,545.16 km) |
| Duffel to Knik-Fairview (Alaska) | 4,526.80 mi (7,285.18 km) |
| Duffel to Knoxville (Tennessee) | 4,278.26 mi (6,885.19 km) |
| Duffel to Kokomo (Indiana) | 4,147.05 mi (6,674.02 km) |
| Duffel to Kuna (Idaho) | 5,005.75 mi (8,055.98 km) |
| Duffel to Kyle (Texas) | 5,126.90 mi (8,250.96 km) |
| Duffel to La Cañada Flintridge (California) | 5,594.84 mi (9,004.03 km) |
| Duffel to La Crescenta-Montrose (California) | 5,594.60 mi (9,003.64 km) |
