| Castelldefels to Juprelle | 673.78 mi (1,084.34 km) |
| Castelldefels to Jurbise | 646.16 mi (1,039.90 km) |
| Castelldefels to Kalmthout | 707.99 mi (1,139.41 km) |
| Castelldefels to Kampenhout | 678.70 mi (1,092.26 km) |
| Castelldefels to Kapelle-op-den-Bos | 682.30 mi (1,098.06 km) |
| Castelldefels to Kapellen | 703.21 mi (1,131.70 km) |
| Castelldefels to Kasterlee | 703.19 mi (1,131.68 km) |
| Castelldefels to Keerbergen | 683.59 mi (1,100.14 km) |
| Castelldefels to Kinrooi | 704.71 mi (1,134.12 km) |
| Castelldefels to Knokke-Heist | 697.95 mi (1,123.24 km) |
| Castelldefels to Koekelare | 679.53 mi (1,093.59 km) |
| Castelldefels to Koekelberg | 671.84 mi (1,081.23 km) |
| Castelldefels to Koksijde | 679.25 mi (1,093.15 km) |
| Castelldefels to Kontich | 690.89 mi (1,111.87 km) |
| Castelldefels to Kortemark | 675.48 mi (1,087.08 km) |
