| Biddeford to Kidricevo | 4,002.49 mi (6,441.39 km) |
| Biddeford to Kobarid | 3,917.11 mi (6,303.98 km) |
| Biddeford to Kobilje | 4,016.73 mi (6,464.31 km) |
| Biddeford to Kocevje | 3,991.33 mi (6,423.43 km) |
| Biddeford to Komen | 3,939.32 mi (6,339.72 km) |
| Biddeford to Komenda | 3,958.06 mi (6,369.88 km) |
| Biddeford to Koper | 3,947.97 mi (6,353.64 km) |
| Biddeford to Kostanjevica na Krki | 4,007.33 mi (6,449.18 km) |
| Biddeford to Kostel | 3,998.24 mi (6,434.54 km) |
| Biddeford to Kozje | 4,004.64 mi (6,444.85 km) |
| Biddeford to Kranj | 3,950.06 mi (6,357.00 km) |
| Biddeford to Kranjska Gora | 3,917.40 mi (6,304.45 km) |
| Biddeford to Krizevci | 4,010.73 mi (6,454.65 km) |
| Biddeford to Krsko | 4,006.00 mi (6,447.03 km) |
| Biddeford to Kuzma | 3,998.74 mi (6,435.36 km) |
