| Port Huron to Karlovo | 5,002.59 mi (8,050.89 km) |
| Port Huron to Karnobat | 5,083.40 mi (8,180.94 km) |
| Port Huron to Kavarna | 5,093.62 mi (8,197.39 km) |
| Port Huron to Kazanlak | 5,025.89 mi (8,088.38 km) |
| Port Huron to Knezha | 4,935.65 mi (7,943.16 km) |
| Port Huron to Kostinbrod | 4,934.94 mi (7,942.02 km) |
| Port Huron to Kozloduy | 4,909.54 mi (7,901.14 km) |
| Port Huron to Kyustendil | 4,939.37 mi (7,949.14 km) |
| Port Huron to Levski | 4,980.68 mi (8,015.62 km) |
| Port Huron to Lom | 4,889.18 mi (7,868.38 km) |
| Port Huron to Lovech | 4,976.20 mi (8,008.41 km) |
| Port Huron to Lukovit | 4,952.71 mi (7,970.61 km) |
| Port Huron to Lyaskovets | 5,014.72 mi (8,070.41 km) |
| Port Huron to Mezdra | 4,937.63 mi (7,946.35 km) |
| Port Huron to Momchilgrad | 5,077.85 mi (8,172.01 km) |
