| Caerfyrddin to Karditsa | 1,520.34 mi (2,446.75 km) |
| Caerfyrddin to Kastoria | 1,441.35 mi (2,319.63 km) |
| Caerfyrddin to Katerini | 1,501.49 mi (2,416.41 km) |
| Caerfyrddin to Keratsini | 1,653.48 mi (2,661.02 km) |
| Caerfyrddin to Kerkyra | 1,431.15 mi (2,303.21 km) |
| Caerfyrddin to Kiato | 1,617.82 mi (2,603.63 km) |
| Caerfyrddin to Kifisia | 1,655.64 mi (2,664.49 km) |
| Caerfyrddin to Kilkis | 1,484.05 mi (2,388.34 km) |
| Caerfyrddin to Komotini | 1,582.53 mi (2,546.84 km) |
| Caerfyrddin to Korinthos | 1,628.17 mi (2,620.28 km) |
| Caerfyrddin to Koropi | 1,666.69 mi (2,682.28 km) |
| Caerfyrddin to Korydallos | 1,653.97 mi (2,661.81 km) |
| Caerfyrddin to Kos | 1,849.42 mi (2,976.36 km) |
| Caerfyrddin to Kozani | 1,471.62 mi (2,368.34 km) |
| Caerfyrddin to Lagos | 1,567.93 mi (2,523.33 km) |
