| Potomac to Juprelle | 3,915.17 mi (6,300.86 km) |
| Potomac to Jurbise | 3,855.08 mi (6,204.15 km) |
| Potomac to Kalmthout | 3,854.89 mi (6,203.85 km) |
| Potomac to Kampenhout | 3,869.57 mi (6,227.47 km) |
| Potomac to Kapelle-op-den-Bos | 3,860.24 mi (6,212.46 km) |
| Potomac to Kapellen | 3,855.25 mi (6,204.43 km) |
| Potomac to Kasterlee | 3,877.69 mi (6,240.54 km) |
| Potomac to Keerbergen | 3,871.26 mi (6,230.19 km) |
| Potomac to Kinrooi | 3,912.10 mi (6,295.92 km) |
| Potomac to Knokke-Heist | 3,808.51 mi (6,129.21 km) |
| Potomac to Koekelare | 3,802.30 mi (6,119.21 km) |
| Potomac to Koekelberg | 3,862.75 mi (6,216.49 km) |
| Potomac to Koksijde | 3,788.67 mi (6,097.28 km) |
| Potomac to Kontich | 3,860.61 mi (6,213.05 km) |
| Potomac to Kortemark | 3,806.43 mi (6,125.86 km) |
