| Upminster to Karlovo | 1,300.02 mi (2,092.18 km) |
| Upminster to Karnobat | 1,389.75 mi (2,236.59 km) |
| Upminster to Kavarna | 1,414.80 mi (2,276.90 km) |
| Upminster to Kazanlak | 1,325.32 mi (2,132.89 km) |
| Upminster to Knezha | 1,235.71 mi (1,988.68 km) |
| Upminster to Kostinbrod | 1,228.40 mi (1,976.92 km) |
| Upminster to Kozloduy | 1,210.16 mi (1,947.57 km) |
| Upminster to Kyustendil | 1,229.89 mi (1,979.32 km) |
| Upminster to Levski | 1,284.16 mi (2,066.65 km) |
| Upminster to Lom | 1,188.17 mi (1,912.18 km) |
| Upminster to Lovech | 1,276.30 mi (2,054.01 km) |
| Upminster to Lukovit | 1,251.15 mi (2,013.53 km) |
| Upminster to Lyaskovets | 1,318.79 mi (2,122.38 km) |
| Upminster to Mezdra | 1,234.16 mi (1,986.19 km) |
| Upminster to Momchilgrad | 1,371.76 mi (2,207.63 km) |
