| Belfast to Karlovo | 1,609.80 mi (2,590.72 km) |
| Belfast to Karnobat | 1,693.65 mi (2,725.66 km) |
| Belfast to Kavarna | 1,710.73 mi (2,753.16 km) |
| Belfast to Kazanlak | 1,633.63 mi (2,629.07 km) |
| Belfast to Knezha | 1,543.43 mi (2,483.91 km) |
| Belfast to Kostinbrod | 1,541.62 mi (2,480.99 km) |
| Belfast to Kozloduy | 1,517.43 mi (2,442.07 km) |
| Belfast to Kyustendil | 1,546.59 mi (2,488.99 km) |
| Belfast to Levski | 1,589.61 mi (2,558.23 km) |
| Belfast to Lom | 1,496.62 mi (2,408.58 km) |
| Belfast to Lovech | 1,584.05 mi (2,549.29 km) |
| Belfast to Lukovit | 1,560.10 mi (2,510.73 km) |
| Belfast to Lyaskovets | 1,623.93 mi (2,613.47 km) |
| Belfast to Mezdra | 1,544.61 mi (2,485.81 km) |
| Belfast to Momchilgrad | 1,684.56 mi (2,711.04 km) |
