| Castro Daire to Karlovo | 1,680.87 mi (2,705.09 km) |
| Castro Daire to Karnobat | 1,790.59 mi (2,881.67 km) |
| Castro Daire to Kavarna | 1,850.79 mi (2,978.56 km) |
| Castro Daire to Kazanlak | 1,710.99 mi (2,753.58 km) |
| Castro Daire to Knezha | 1,638.38 mi (2,636.71 km) |
| Castro Daire to Kostinbrod | 1,599.31 mi (2,573.84 km) |
| Castro Daire to Kozloduy | 1,619.43 mi (2,606.22 km) |
| Castro Daire to Kyustendil | 1,576.45 mi (2,537.06 km) |
| Castro Daire to Levski | 1,691.68 mi (2,722.50 km) |
| Castro Daire to Lom | 1,594.57 mi (2,566.21 km) |
| Castro Daire to Lovech | 1,672.48 mi (2,691.59 km) |
| Castro Daire to Lukovit | 1,644.42 mi (2,646.44 km) |
| Castro Daire to Lyaskovets | 1,722.85 mi (2,772.65 km) |
| Castro Daire to Mezdra | 1,621.34 mi (2,609.30 km) |
| Castro Daire to Momchilgrad | 1,723.04 mi (2,772.96 km) |
