| Castanet-Tolosan to Juprelle | 532.29 mi (856.64 km) |
| Castanet-Tolosan to Jurbise | 498.18 mi (801.75 km) |
| Castanet-Tolosan to Kalmthout | 560.90 mi (902.68 km) |
| Castanet-Tolosan to Kampenhout | 532.54 mi (857.05 km) |
| Castanet-Tolosan to Kapelle-op-den-Bos | 535.33 mi (861.53 km) |
| Castanet-Tolosan to Kapellen | 556.08 mi (894.92 km) |
| Castanet-Tolosan to Kasterlee | 558.10 mi (898.17 km) |
| Castanet-Tolosan to Keerbergen | 537.66 mi (865.28 km) |
| Castanet-Tolosan to Kinrooi | 563.09 mi (906.20 km) |
| Castanet-Tolosan to Knokke-Heist | 547.09 mi (880.46 km) |
| Castanet-Tolosan to Koekelare | 527.94 mi (849.64 km) |
| Castanet-Tolosan to Koekelberg | 524.96 mi (844.84 km) |
| Castanet-Tolosan to Koksijde | 526.78 mi (847.78 km) |
| Castanet-Tolosan to Kontich | 544.07 mi (875.59 km) |
| Castanet-Tolosan to Kortemark | 524.10 mi (843.46 km) |
