| Merthyr Tudful to Islahiye | 2,185.33 mi (3,516.95 km) |
| Merthyr Tudful to Isparta | 1,900.03 mi (3,057.81 km) |
| Merthyr Tudful to Istanbul | 1,691.67 mi (2,722.48 km) |
| Merthyr Tudful to Izmir | 1,731.31 mi (2,786.28 km) |
| Merthyr Tudful to Kadinhani | 1,946.66 mi (3,132.85 km) |
| Merthyr Tudful to Kadirli | 2,147.50 mi (3,456.06 km) |
| Merthyr Tudful to Kagithane | 1,689.73 mi (2,719.35 km) |
| Merthyr Tudful to Kahramanmaras | 2,172.96 mi (3,497.04 km) |
| Merthyr Tudful to Kahta | 2,235.48 mi (3,597.65 km) |
| Merthyr Tudful to Kaman | 1,960.92 mi (3,155.80 km) |
| Merthyr Tudful to Kangal | 2,120.70 mi (3,412.93 km) |
| Merthyr Tudful to Kapakli | 1,637.29 mi (2,634.97 km) |
| Merthyr Tudful to Karaagac | 2,185.15 mi (3,516.65 km) |
| Merthyr Tudful to Karaagac | 1,637.98 mi (2,636.07 km) |
| Merthyr Tudful to Karabuk | 1,838.24 mi (2,958.36 km) |
