| Piqua to Karlovo | 5,204.66 mi (8,376.09 km) |
| Piqua to Karnobat | 5,286.97 mi (8,508.55 km) |
| Piqua to Kavarna | 5,298.83 mi (8,527.65 km) |
| Piqua to Kazanlak | 5,228.35 mi (8,414.21 km) |
| Piqua to Knezha | 5,138.12 mi (8,269.01 km) |
| Piqua to Kostinbrod | 5,136.07 mi (8,265.70 km) |
| Piqua to Kozloduy | 5,112.08 mi (8,227.09 km) |
| Piqua to Kyustendil | 5,139.51 mi (8,271.24 km) |
| Piqua to Levski | 5,183.72 mi (8,342.40 km) |
| Piqua to Lom | 5,091.43 mi (8,193.86 km) |
| Piqua to Lovech | 5,178.72 mi (8,334.35 km) |
| Piqua to Lukovit | 5,154.92 mi (8,296.04 km) |
| Piqua to Lyaskovets | 5,217.89 mi (8,397.38 km) |
| Piqua to Mezdra | 5,139.47 mi (8,271.18 km) |
| Piqua to Momchilgrad | 5,279.19 mi (8,496.03 km) |
