| Potomac to Kluczbork | 4,401.65 mi (7,083.76 km) |
| Potomac to Knurow | 4,446.27 mi (7,155.57 km) |
| Potomac to Kobylka | 4,463.16 mi (7,182.77 km) |
| Potomac to Kokoszki | 4,296.20 mi (6,914.06 km) |
| Potomac to Kolbuszowa | 4,560.72 mi (7,339.77 km) |
| Potomac to Kolno | 4,450.09 mi (7,161.72 km) |
| Potomac to Kolo | 4,374.76 mi (7,040.50 km) |
| Potomac to Kolobrzeg | 4,198.24 mi (6,756.42 km) |
| Potomac to Koluszki | 4,433.33 mi (7,134.75 km) |
| Potomac to Komorniki | 4,301.28 mi (6,922.23 km) |
| Potomac to Konin | 4,360.74 mi (7,017.93 km) |
| Potomac to Konskie | 4,475.76 mi (7,203.04 km) |
| Potomac to Konstancin-Jeziorna | 4,469.24 mi (7,192.55 km) |
| Potomac to Konstantynow Lodzki | 4,416.20 mi (7,107.18 km) |
| Potomac to Koronowo | 4,311.17 mi (6,938.16 km) |
