| Rhondda to Karditsa | 1,478.47 mi (2,379.37 km) |
| Rhondda to Kastoria | 1,399.48 mi (2,252.24 km) |
| Rhondda to Katerini | 1,459.63 mi (2,349.04 km) |
| Rhondda to Keratsini | 1,611.63 mi (2,593.66 km) |
| Rhondda to Kerkyra | 1,389.36 mi (2,235.96 km) |
| Rhondda to Kiato | 1,575.99 mi (2,536.31 km) |
| Rhondda to Kifisia | 1,613.77 mi (2,597.11 km) |
| Rhondda to Kilkis | 1,442.25 mi (2,321.07 km) |
| Rhondda to Komotini | 1,540.96 mi (2,479.94 km) |
| Rhondda to Korinthos | 1,586.34 mi (2,552.96 km) |
| Rhondda to Koropi | 1,624.83 mi (2,614.91 km) |
| Rhondda to Korydallos | 1,612.11 mi (2,594.45 km) |
| Rhondda to Kos | 1,807.56 mi (2,908.99 km) |
| Rhondda to Kozani | 1,429.75 mi (2,300.96 km) |
| Rhondda to Lagos | 1,526.31 mi (2,456.36 km) |
