| Washougal to Karlovo | 6,015.00 mi (9,680.21 km) |
| Washougal to Karnobat | 6,056.45 mi (9,746.91 km) |
| Washougal to Kavarna | 6,028.56 mi (9,702.02 km) |
| Washougal to Kazanlak | 6,028.08 mi (9,701.26 km) |
| Washougal to Knezha | 5,946.34 mi (9,569.70 km) |
| Washougal to Kostinbrod | 5,972.63 mi (9,612.02 km) |
| Washougal to Kozloduy | 5,921.49 mi (9,529.71 km) |
| Washougal to Kyustendil | 5,995.58 mi (9,648.96 km) |
| Washougal to Levski | 5,974.99 mi (9,615.82 km) |
| Washougal to Lom | 5,909.06 mi (9,509.71 km) |
| Washougal to Lovech | 5,981.89 mi (9,626.92 km) |
| Washougal to Lukovit | 5,967.07 mi (9,603.07 km) |
| Washougal to Lyaskovets | 6,003.07 mi (9,661.00 km) |
| Washougal to Mezdra | 5,961.09 mi (9,593.45 km) |
| Washougal to Momchilgrad | 6,097.84 mi (9,813.52 km) |
