| Porthcawl to Kinston (North Carolina) | 3,706.48 mi (5,965.00 km) |
| Porthcawl to Kirkland (Washington) | 4,681.53 mi (7,534.19 km) |
| Porthcawl to Kirksville (Missouri) | 4,080.19 mi (6,566.43 km) |
| Porthcawl to Kirkwood (Missouri) | 4,073.63 mi (6,555.88 km) |
| Porthcawl to Kiryas Joel (New York) | 3,295.48 mi (5,303.57 km) |
| Porthcawl to Kissimmee (Florida) | 4,202.36 mi (6,763.05 km) |
| Porthcawl to Klamath Falls (Oregon) | 4,976.42 mi (8,008.77 km) |
| Porthcawl to Knightdale (North Carolina) | 3,720.37 mi (5,987.36 km) |
| Porthcawl to Knik-Fairview (Alaska) | 4,408.09 mi (7,094.13 km) |
| Porthcawl to Knoxville (Tennessee) | 3,937.49 mi (6,336.78 km) |
| Porthcawl to Kokomo (Indiana) | 3,816.88 mi (6,142.68 km) |
| Porthcawl to Kuna (Idaho) | 4,743.32 mi (7,633.63 km) |
| Porthcawl to Kyle (Texas) | 4,795.86 mi (7,718.19 km) |
| Porthcawl to La Cañada Flintridge (California) | 5,315.06 mi (8,553.76 km) |
| Porthcawl to La Crescenta-Montrose (California) | 5,314.96 mi (8,553.60 km) |
