| Merthyr Tudful to Imatra | 1,370.09 mi (2,204.94 km) |
| Merthyr Tudful to Jakobstad | 1,251.28 mi (2,013.74 km) |
| Merthyr Tudful to Jamsa | 1,271.01 mi (2,045.49 km) |
| Merthyr Tudful to Janakkala | 1,232.69 mi (1,983.83 km) |
| Merthyr Tudful to Jarvenpaa | 1,237.87 mi (1,992.17 km) |
| Merthyr Tudful to Joensuu | 1,426.44 mi (2,295.63 km) |
| Merthyr Tudful to Joutseno | 1,360.51 mi (2,189.52 km) |
| Merthyr Tudful to Jyvaskyla | 1,296.99 mi (2,087.31 km) |
| Merthyr Tudful to Jyvaskylan Maalaiskunta | 1,298.14 mi (2,089.16 km) |
| Merthyr Tudful to Kaarina | 1,147.97 mi (1,847.48 km) |
| Merthyr Tudful to Kajaani | 1,405.25 mi (2,261.53 km) |
| Merthyr Tudful to Kalajoki | 1,304.44 mi (2,099.29 km) |
| Merthyr Tudful to Kangasala | 1,226.92 mi (1,974.54 km) |
| Merthyr Tudful to Kankaanpaa | 1,185.21 mi (1,907.41 km) |
| Merthyr Tudful to Karhula | 1,299.14 mi (2,090.76 km) |
