| Monmouth to Karlovo | 1,426.87 mi (2,296.32 km) |
| Monmouth to Karnobat | 1,517.41 mi (2,442.04 km) |
| Monmouth to Kavarna | 1,543.09 mi (2,483.36 km) |
| Monmouth to Kazanlak | 1,452.40 mi (2,337.42 km) |
| Monmouth to Knezha | 1,362.95 mi (2,193.46 km) |
| Monmouth to Kostinbrod | 1,354.59 mi (2,180.00 km) |
| Monmouth to Kozloduy | 1,337.49 mi (2,152.48 km) |
| Monmouth to Kyustendil | 1,355.12 mi (2,180.86 km) |
| Monmouth to Levski | 1,411.69 mi (2,271.89 km) |
| Monmouth to Lom | 1,315.33 mi (2,116.83 km) |
| Monmouth to Lovech | 1,403.51 mi (2,258.74 km) |
| Monmouth to Lukovit | 1,378.18 mi (2,217.97 km) |
| Monmouth to Lyaskovets | 1,446.33 mi (2,327.65 km) |
| Monmouth to Mezdra | 1,360.93 mi (2,190.21 km) |
| Monmouth to Momchilgrad | 1,497.92 mi (2,410.67 km) |
