| Llantrisant to Kinston (North Carolina) | 3,718.69 mi (5,984.65 km) |
| Llantrisant to Kirkland (Washington) | 4,686.87 mi (7,542.78 km) |
| Llantrisant to Kirksville (Missouri) | 4,090.28 mi (6,582.68 km) |
| Llantrisant to Kirkwood (Missouri) | 4,084.19 mi (6,572.87 km) |
| Llantrisant to Kiryas Joel (New York) | 3,307.19 mi (5,322.40 km) |
| Llantrisant to Kissimmee (Florida) | 4,214.97 mi (6,783.34 km) |
| Llantrisant to Klamath Falls (Oregon) | 4,982.59 mi (8,018.70 km) |
| Llantrisant to Knightdale (North Carolina) | 3,732.44 mi (6,006.79 km) |
| Llantrisant to Knik-Fairview (Alaska) | 4,408.01 mi (7,094.01 km) |
| Llantrisant to Knoxville (Tennessee) | 3,949.05 mi (6,355.37 km) |
| Llantrisant to Kokomo (Indiana) | 3,827.60 mi (6,159.93 km) |
| Llantrisant to Kuna (Idaho) | 4,750.05 mi (7,644.47 km) |
| Llantrisant to Kyle (Texas) | 4,806.69 mi (7,735.62 km) |
| Llantrisant to La Cañada Flintridge (California) | 5,322.78 mi (8,566.18 km) |
| Llantrisant to La Crescenta-Montrose (California) | 5,322.67 mi (8,566.01 km) |
