| Firminy to Karlovo | 1,034.12 mi (1,664.26 km) |
| Firminy to Karnobat | 1,139.83 mi (1,834.38 km) |
| Firminy to Kavarna | 1,189.99 mi (1,915.11 km) |
| Firminy to Kazanlak | 1,063.41 mi (1,711.39 km) |
| Firminy to Knezha | 982.64 mi (1,581.40 km) |
| Firminy to Kostinbrod | 953.52 mi (1,534.54 km) |
| Firminy to Kozloduy | 960.93 mi (1,546.47 km) |
| Firminy to Kyustendil | 939.35 mi (1,511.73 km) |
| Firminy to Levski | 1,035.93 mi (1,667.16 km) |
| Firminy to Lom | 936.20 mi (1,506.67 km) |
| Firminy to Lovech | 1,020.00 mi (1,641.53 km) |
| Firminy to Lukovit | 992.07 mi (1,596.58 km) |
| Firminy to Lyaskovets | 1,069.14 mi (1,720.62 km) |
| Firminy to Mezdra | 970.38 mi (1,561.67 km) |
| Firminy to Momchilgrad | 1,089.14 mi (1,752.80 km) |
