| Letterkenny to Juprelle | 624.58 mi (1,005.16 km) |
| Letterkenny to Jurbise | 574.23 mi (924.14 km) |
| Letterkenny to Kalmthout | 560.89 mi (902.66 km) |
| Letterkenny to Kampenhout | 580.16 mi (933.67 km) |
| Letterkenny to Kapelle-op-den-Bos | 570.65 mi (918.37 km) |
| Letterkenny to Kapellen | 562.03 mi (904.50 km) |
| Letterkenny to Kasterlee | 583.52 mi (939.09 km) |
| Letterkenny to Keerbergen | 580.80 mi (934.70 km) |
| Letterkenny to Kinrooi | 616.64 mi (992.39 km) |
| Letterkenny to Knokke-Heist | 519.22 mi (835.60 km) |
| Letterkenny to Koekelare | 517.95 mi (833.56 km) |
| Letterkenny to Koekelberg | 575.18 mi (925.66 km) |
| Letterkenny to Koksijde | 505.90 mi (814.17 km) |
| Letterkenny to Kontich | 569.33 mi (916.24 km) |
| Letterkenny to Kortemark | 522.70 mi (841.20 km) |
