| Webster Groves to Karlovo | 5,509.77 mi (8,867.11 km) |
| Webster Groves to Karnobat | 5,588.93 mi (8,994.51 km) |
| Webster Groves to Kavarna | 5,597.03 mi (9,007.55 km) |
| Webster Groves to Kazanlak | 5,532.66 mi (8,903.96 km) |
| Webster Groves to Knezha | 5,442.45 mi (8,758.78 km) |
| Webster Groves to Kostinbrod | 5,443.02 mi (8,759.70 km) |
| Webster Groves to Kozloduy | 5,416.29 mi (8,716.68 km) |
| Webster Groves to Kyustendil | 5,448.27 mi (8,768.15 km) |
| Webster Groves to Levski | 5,486.85 mi (8,830.23 km) |
| Webster Groves to Lom | 5,396.24 mi (8,684.41 km) |
| Webster Groves to Lovech | 5,482.93 mi (8,823.92 km) |
| Webster Groves to Lukovit | 5,459.77 mi (8,786.65 km) |
| Webster Groves to Lyaskovets | 5,520.74 mi (8,884.76 km) |
| Webster Groves to Mezdra | 5,445.07 mi (8,762.99 km) |
| Webster Groves to Momchilgrad | 5,585.70 mi (8,989.31 km) |
