| Caerfyrddin to Jicin | 855.46 mi (1,376.72 km) |
| Caerfyrddin to Jihlava | 885.90 mi (1,425.71 km) |
| Caerfyrddin to Jindrichuv Hradec | 866.71 mi (1,394.84 km) |
| Caerfyrddin to Jirkov | 773.16 mi (1,244.28 km) |
| Caerfyrddin to Kadan | 767.72 mi (1,235.52 km) |
| Caerfyrddin to Karlovy Vary | 753.27 mi (1,212.27 km) |
| Caerfyrddin to Karvina | 1,002.35 mi (1,613.13 km) |
| Caerfyrddin to Kladno | 807.11 mi (1,298.92 km) |
| Caerfyrddin to Klasterec nad Ohri | 763.31 mi (1,228.42 km) |
| Caerfyrddin to Klatovy | 788.32 mi (1,268.69 km) |
| Caerfyrddin to Kolin | 856.35 mi (1,378.17 km) |
| Caerfyrddin to Koprivnice | 990.57 mi (1,594.16 km) |
| Caerfyrddin to Kralupy nad Vltavou | 814.48 mi (1,310.78 km) |
| Caerfyrddin to Kraluv Dvur | 808.12 mi (1,300.54 km) |
| Caerfyrddin to Krnov | 961.77 mi (1,547.82 km) |
