| Alton to Karlovo | 1,342.34 mi (2,160.29 km) |
| Alton to Karnobat | 1,434.03 mi (2,307.85 km) |
| Alton to Kavarna | 1,461.42 mi (2,351.93 km) |
| Alton to Kazanlak | 1,368.16 mi (2,201.83 km) |
| Alton to Knezha | 1,278.94 mi (2,058.26 km) |
| Alton to Kostinbrod | 1,269.43 mi (2,042.94 km) |
| Alton to Kozloduy | 1,253.61 mi (2,017.50 km) |
| Alton to Kyustendil | 1,269.26 mi (2,042.67 km) |
| Alton to Levski | 1,328.11 mi (2,137.38 km) |
| Alton to Lom | 1,231.23 mi (1,981.48 km) |
| Alton to Lovech | 1,319.44 mi (2,123.44 km) |
| Alton to Lukovit | 1,293.88 mi (2,082.31 km) |
| Alton to Lyaskovets | 1,362.77 mi (2,193.16 km) |
| Alton to Mezdra | 1,276.34 mi (2,054.07 km) |
| Alton to Momchilgrad | 1,412.69 mi (2,273.51 km) |
