| Rhondda to Glyka Nera | 1,619.42 mi (2,606.21 km) |
| Rhondda to Grevena | 1,425.69 mi (2,294.43 km) |
| Rhondda to Ialysos | 1,864.88 mi (3,001.23 km) |
| Rhondda to Ilion | 1,611.64 mi (2,593.68 km) |
| Rhondda to Ilioupoli | 1,618.42 mi (2,604.60 km) |
| Rhondda to Ioannina | 1,423.14 mi (2,290.33 km) |
| Rhondda to Irakleio | 1,800.66 mi (2,897.88 km) |
| Rhondda to Irakleio | 1,613.43 mi (2,596.56 km) |
| Rhondda to Kaisariani | 1,617.05 mi (2,602.39 km) |
| Rhondda to Kalamaria | 1,463.31 mi (2,354.97 km) |
| Rhondda to Kalamata | 1,600.15 mi (2,575.19 km) |
| Rhondda to Kallithea | 1,615.67 mi (2,600.17 km) |
| Rhondda to Kalymnos | 1,790.98 mi (2,882.31 km) |
| Rhondda to Kalyvia Thorikou | 1,629.75 mi (2,622.83 km) |
| Rhondda to Kamatero | 1,610.83 mi (2,592.38 km) |
