| Rhondda to Kanjiza | 1,128.00 mi (1,815.34 km) |
| Rhondda to Kikinda | 1,152.59 mi (1,854.92 km) |
| Rhondda to Kladovo | 1,286.05 mi (2,069.69 km) |
| Rhondda to Knic | 1,232.98 mi (1,984.30 km) |
| Rhondda to Knjazevac | 1,320.11 mi (2,124.51 km) |
| Rhondda to Koceljeva | 1,174.26 mi (1,889.80 km) |
| Rhondda to Kosjeric | 1,196.83 mi (1,926.12 km) |
| Rhondda to Kovacica | 1,184.66 mi (1,906.53 km) |
| Rhondda to Kovin | 1,212.08 mi (1,950.66 km) |
| Rhondda to Kragujevac | 1,238.43 mi (1,993.05 km) |
| Rhondda to Kraljevo | 1,239.29 mi (1,994.45 km) |
| Rhondda to Krupanj | 1,160.08 mi (1,866.96 km) |
| Rhondda to Krusevac | 1,271.12 mi (2,045.66 km) |
| Rhondda to Kucevo | 1,251.05 mi (2,013.37 km) |
| Rhondda to Kula | 1,122.02 mi (1,805.72 km) |
