| Caerfyrddin to Juprelle | 432.48 mi (696.01 km) |
| Caerfyrddin to Jurbise | 368.47 mi (592.99 km) |
| Caerfyrddin to Kalmthout | 377.95 mi (608.25 km) |
| Caerfyrddin to Kampenhout | 387.11 mi (622.99 km) |
| Caerfyrddin to Kapelle-op-den-Bos | 378.21 mi (608.67 km) |
| Caerfyrddin to Kapellen | 377.22 mi (607.08 km) |
| Caerfyrddin to Kasterlee | 400.00 mi (643.74 km) |
| Caerfyrddin to Keerbergen | 389.65 mi (627.07 km) |
| Caerfyrddin to Kinrooi | 434.96 mi (700.00 km) |
| Caerfyrddin to Knokke-Heist | 328.08 mi (528.00 km) |
| Caerfyrddin to Koekelare | 318.29 mi (512.24 km) |
| Caerfyrddin to Koekelberg | 379.12 mi (610.14 km) |
| Caerfyrddin to Koksijde | 304.16 mi (489.49 km) |
| Caerfyrddin to Kontich | 380.14 mi (611.77 km) |
| Caerfyrddin to Kortemark | 321.95 mi (518.13 km) |
