| Castleford to Kinston (North Carolina) | 3,766.82 mi (6,062.11 km) |
| Castleford to Kirkland (Washington) | 4,624.06 mi (7,441.70 km) |
| Castleford to Kirksville (Missouri) | 4,096.66 mi (6,592.94 km) |
| Castleford to Kirkwood (Missouri) | 4,098.69 mi (6,596.20 km) |
| Castleford to Kiryas Joel (New York) | 3,344.98 mi (5,383.22 km) |
| Castleford to Kissimmee (Florida) | 4,271.80 mi (6,874.80 km) |
| Castleford to Klamath Falls (Oregon) | 4,929.88 mi (7,933.88 km) |
| Castleford to Knightdale (North Carolina) | 3,777.43 mi (6,079.19 km) |
| Castleford to Knik-Fairview (Alaska) | 4,288.78 mi (6,902.12 km) |
| Castleford to Knoxville (Tennessee) | 3,982.71 mi (6,409.56 km) |
| Castleford to Kokomo (Indiana) | 3,845.46 mi (6,188.68 km) |
| Castleford to Kuna (Idaho) | 4,704.99 mi (7,571.95 km) |
| Castleford to Kyle (Texas) | 4,825.31 mi (7,765.58 km) |
| Castleford to La Cañada Flintridge (California) | 5,290.67 mi (8,514.52 km) |
| Castleford to La Crescenta-Montrose (California) | 5,290.46 mi (8,514.17 km) |
