| Potomac to Kalispell (Montana) | 1,941.29 mi (3,124.20 km) |
| Potomac to Kaneohe (Hawaii) | 4,811.50 mi (7,743.36 km) |
| Potomac to Kankakee (Illinois) | 581.99 mi (936.63 km) |
| Potomac to Kannapolis (North Carolina) | 309.27 mi (497.72 km) |
| Potomac to Kansas City (Kansas) | 940.00 mi (1,512.79 km) |
| Potomac to Kansas City (Missouri) | 929.84 mi (1,496.44 km) |
| Potomac to Kapaa (Hawaii) | 4,866.15 mi (7,831.31 km) |
| Potomac to Kapolei (Hawaii) | 4,828.72 mi (7,771.08 km) |
| Potomac to Katy (Texas) | 1,235.46 mi (1,988.28 km) |
| Potomac to Kaukauna (Wisconsin) | 676.52 mi (1,088.76 km) |
| Potomac to Kaysville (Utah) | 1,831.87 mi (2,948.11 km) |
| Potomac to Kearney (Missouri) | 918.23 mi (1,477.74 km) |
| Potomac to Kearney (Nebraska) | 1,163.76 mi (1,872.90 km) |
| Potomac to Kearns (Utah) | 1,838.61 mi (2,958.96 km) |
| Potomac to Kearny (New Jersey) | 202.45 mi (325.82 km) |
