| Boulder to Juprelle | 4,904.95 mi (7,893.75 km) |
| Boulder to Jurbise | 4,859.66 mi (7,820.86 km) |
| Boulder to Kalmthout | 4,839.82 mi (7,788.94 km) |
| Boulder to Kampenhout | 4,862.21 mi (7,824.97 km) |
| Boulder to Kapelle-op-den-Bos | 4,852.76 mi (7,809.77 km) |
| Boulder to Kapellen | 4,841.67 mi (7,791.91 km) |
| Boulder to Kasterlee | 4,861.72 mi (7,824.18 km) |
| Boulder to Keerbergen | 4,862.17 mi (7,824.90 km) |
| Boulder to Kinrooi | 4,892.44 mi (7,873.62 km) |
| Boulder to Knokke-Heist | 4,802.42 mi (7,728.75 km) |
| Boulder to Koekelare | 4,803.06 mi (7,729.78 km) |
| Boulder to Koekelberg | 4,858.31 mi (7,818.69 km) |
| Boulder to Koksijde | 4,791.51 mi (7,711.19 km) |
| Boulder to Kontich | 4,850.36 mi (7,805.90 km) |
| Boulder to Kortemark | 4,807.93 mi (7,737.61 km) |
