| Rhondda to Kinston (North Carolina) | 3,715.74 mi (5,979.91 km) |
| Rhondda to Kirkland (Washington) | 4,681.77 mi (7,534.58 km) |
| Rhondda to Kirksville (Missouri) | 4,086.33 mi (6,576.31 km) |
| Rhondda to Kirkwood (Missouri) | 4,080.41 mi (6,566.79 km) |
| Rhondda to Kiryas Joel (New York) | 3,303.95 mi (5,317.19 km) |
| Rhondda to Kissimmee (Florida) | 4,212.29 mi (6,779.02 km) |
| Rhondda to Klamath Falls (Oregon) | 4,977.62 mi (8,010.70 km) |
| Rhondda to Knightdale (North Carolina) | 3,729.41 mi (6,001.91 km) |
| Rhondda to Knik-Fairview (Alaska) | 4,402.60 mi (7,085.29 km) |
| Rhondda to Knoxville (Tennessee) | 3,945.72 mi (6,350.03 km) |
| Rhondda to Kokomo (Indiana) | 3,823.90 mi (6,153.96 km) |
| Rhondda to Kuna (Idaho) | 4,745.18 mi (7,636.63 km) |
| Rhondda to Kyle (Texas) | 4,803.03 mi (7,729.72 km) |
| Rhondda to La Cañada Flintridge (California) | 5,318.12 mi (8,558.68 km) |
| Rhondda to La Crescenta-Montrose (California) | 5,318.01 mi (8,558.51 km) |
