| Caernarfon to Juprelle | 449.53 mi (723.44 km) |
| Caernarfon to Jurbise | 393.50 mi (633.28 km) |
| Caernarfon to Kalmthout | 388.60 mi (625.39 km) |
| Caernarfon to Kampenhout | 404.10 mi (650.34 km) |
| Caernarfon to Kapelle-op-den-Bos | 394.68 mi (635.18 km) |
| Caernarfon to Kapellen | 388.98 mi (626.00 km) |
| Caernarfon to Kasterlee | 411.40 mi (662.08 km) |
| Caernarfon to Keerbergen | 405.50 mi (652.59 km) |
| Caernarfon to Kinrooi | 445.84 mi (717.51 km) |
| Caernarfon to Knokke-Heist | 342.82 mi (551.71 km) |
| Caernarfon to Koekelare | 338.44 mi (544.67 km) |
| Caernarfon to Koekelberg | 397.90 mi (640.36 km) |
| Caernarfon to Koksijde | 325.47 mi (523.80 km) |
| Caernarfon to Kontich | 394.62 mi (635.08 km) |
| Caernarfon to Kortemark | 342.90 mi (551.84 km) |
