| Welby to Karlovo | 5,930.46 mi (9,544.16 km) |
| Welby to Karnobat | 5,995.40 mi (9,648.67 km) |
| Welby to Kavarna | 5,988.41 mi (9,637.42 km) |
| Welby to Kazanlak | 5,949.72 mi (9,575.14 km) |
| Welby to Knezha | 5,861.17 mi (9,432.64 km) |
| Welby to Kostinbrod | 5,872.55 mi (9,450.95 km) |
| Welby to Kozloduy | 5,835.01 mi (9,390.54 km) |
| Welby to Kyustendil | 5,885.30 mi (9,471.48 km) |
| Welby to Levski | 5,899.87 mi (9,494.92 km) |
| Welby to Lom | 5,817.74 mi (9,362.75 km) |
| Welby to Lovech | 5,900.42 mi (9,495.82 km) |
| Welby to Lukovit | 5,880.28 mi (9,463.40 km) |
| Welby to Lyaskovets | 5,932.02 mi (9,546.66 km) |
| Welby to Mezdra | 5,868.94 mi (9,445.15 km) |
| Welby to Momchilgrad | 6,010.87 mi (9,673.56 km) |
