| Merthyr Tudful to Iver | 124.07 mi (199.67 km) |
| Merthyr Tudful to Ivybridge | 96.48 mi (155.26 km) |
| Merthyr Tudful to Jarrow | 236.88 mi (381.23 km) |
| Merthyr Tudful to Johnstone | 286.39 mi (460.91 km) |
| Merthyr Tudful to Kearsley | 130.50 mi (210.02 km) |
| Merthyr Tudful to Keighley | 159.02 mi (255.92 km) |
| Merthyr Tudful to Kempston | 125.39 mi (201.79 km) |
| Merthyr Tudful to Kendal | 180.39 mi (290.32 km) |
| Merthyr Tudful to Kenilworth | 87.39 mi (140.64 km) |
| Merthyr Tudful to Kenley | 143.95 mi (231.66 km) |
| Merthyr Tudful to Kensington | 137.77 mi (221.72 km) |
| Merthyr Tudful to Kenton | 131.97 mi (212.38 km) |
| Merthyr Tudful to Kettering | 121.38 mi (195.34 km) |
| Merthyr Tudful to Kew Green | 136.00 mi (218.87 km) |
| Merthyr Tudful to Keynsham | 44.16 mi (71.06 km) |
