| Merthyr Tudful to Glyka Nera | 1,621.59 mi (2,609.70 km) |
| Merthyr Tudful to Grevena | 1,427.78 mi (2,297.79 km) |
| Merthyr Tudful to Ialysos | 1,866.59 mi (3,003.99 km) |
| Merthyr Tudful to Ilion | 1,613.83 mi (2,597.21 km) |
| Merthyr Tudful to Ilioupoli | 1,620.63 mi (2,608.15 km) |
| Merthyr Tudful to Ioannina | 1,425.49 mi (2,294.10 km) |
| Merthyr Tudful to Irakleio | 1,803.22 mi (2,902.01 km) |
| Merthyr Tudful to Irakleio | 1,615.60 mi (2,600.06 km) |
| Merthyr Tudful to Kaisariani | 1,619.25 mi (2,605.93 km) |
| Merthyr Tudful to Kalamaria | 1,464.90 mi (2,357.53 km) |
| Merthyr Tudful to Kalamata | 1,602.95 mi (2,579.70 km) |
| Merthyr Tudful to Kallithea | 1,617.89 mi (2,603.74 km) |
| Merthyr Tudful to Kalymnos | 1,792.78 mi (2,885.20 km) |
| Merthyr Tudful to Kalyvia Thorikou | 1,631.95 mi (2,626.37 km) |
| Merthyr Tudful to Kamatero | 1,613.02 mi (2,595.90 km) |
