| Poplar Bluff to Karlovo | 5,604.90 mi (9,020.21 km) |
| Poplar Bluff to Karnobat | 5,685.66 mi (9,150.18 km) |
| Poplar Bluff to Kavarna | 5,695.53 mi (9,166.08 km) |
| Poplar Bluff to Kazanlak | 5,628.21 mi (9,057.72 km) |
| Poplar Bluff to Knezha | 5,537.97 mi (8,912.50 km) |
| Poplar Bluff to Kostinbrod | 5,537.17 mi (8,911.21 km) |
| Poplar Bluff to Kozloduy | 5,511.86 mi (8,870.48 km) |
| Poplar Bluff to Kyustendil | 5,541.43 mi (8,918.07 km) |
| Poplar Bluff to Levski | 5,582.98 mi (8,984.94 km) |
| Poplar Bluff to Lom | 5,491.50 mi (8,837.72 km) |
| Poplar Bluff to Lovech | 5,578.52 mi (8,977.75 km) |
| Poplar Bluff to Lukovit | 5,555.02 mi (8,939.95 km) |
| Poplar Bluff to Lyaskovets | 5,617.01 mi (9,039.71 km) |
| Poplar Bluff to Mezdra | 5,539.93 mi (8,915.66 km) |
| Poplar Bluff to Momchilgrad | 5,680.11 mi (9,141.25 km) |
