| Merthyr Tudful to Keizer (Oregon) | 4,850.44 mi (7,806.04 km) |
| Merthyr Tudful to Keller (Texas) | 4,623.64 mi (7,441.03 km) |
| Merthyr Tudful to Kelso (Washington) | 4,783.33 mi (7,698.03 km) |
| Merthyr Tudful to Kemp Mill (Maryland) | 3,520.09 mi (5,665.04 km) |
| Merthyr Tudful to Ken Caryl (Colorado) | 4,575.42 mi (7,363.43 km) |
| Merthyr Tudful to Kendale Lakes (Florida) | 4,300.03 mi (6,920.23 km) |
| Merthyr Tudful to Kendall (Florida) | 4,299.75 mi (6,919.79 km) |
| Merthyr Tudful to Kendall Park (New Jersey) | 3,358.96 mi (5,405.73 km) |
| Merthyr Tudful to Kendall West (Florida) | 4,301.43 mi (6,922.48 km) |
| Merthyr Tudful to Kenmore (New York) | 3,424.12 mi (5,510.59 km) |
| Merthyr Tudful to Kenmore (Washington) | 4,674.20 mi (7,522.40 km) |
| Merthyr Tudful to Kenner (Louisiana) | 4,493.93 mi (7,232.29 km) |
| Merthyr Tudful to Kennesaw (Georgia) | 4,064.88 mi (6,541.79 km) |
| Merthyr Tudful to Kennett (Missouri) | 4,176.51 mi (6,721.45 km) |
| Merthyr Tudful to Kennewick (Washington) | 4,674.29 mi (7,522.54 km) |
