| Grez-Doiceau to Karnobat | 1,188.80 mi (1,913.18 km) |
| Grez-Doiceau to Kavarna | 1,214.00 mi (1,953.75 km) |
| Grez-Doiceau to Kazanlak | 1,124.68 mi (1,810.00 km) |
| Grez-Doiceau to Knezha | 1,034.97 mi (1,665.63 km) |
| Grez-Doiceau to Kostinbrod | 1,028.59 mi (1,655.35 km) |
| Grez-Doiceau to Kozloduy | 1,009.37 mi (1,624.43 km) |
| Grez-Doiceau to Kyustendil | 1,031.15 mi (1,659.47 km) |
| Grez-Doiceau to Levski | 1,083.26 mi (1,743.33 km) |
| Grez-Doiceau to Lom | 987.50 mi (1,589.22 km) |
| Grez-Doiceau to Lovech | 1,075.59 mi (1,730.99 km) |
| Grez-Doiceau to Lukovit | 1,050.56 mi (1,690.71 km) |
| Grez-Doiceau to Lyaskovets | 1,117.87 mi (1,799.04 km) |
| Grez-Doiceau to Mezdra | 1,033.79 mi (1,663.72 km) |
| Grez-Doiceau to Momchilgrad | 1,171.92 mi (1,886.03 km) |
| Grez-Doiceau to Montana | 1,003.86 mi (1,615.56 km) |
