| Gladstone to Karlovo | 5,627.16 mi (9,056.04 km) |
| Gladstone to Karnobat | 5,702.29 mi (9,176.94 km) |
| Gladstone to Kavarna | 5,705.88 mi (9,182.73 km) |
| Gladstone to Kazanlak | 5,649.03 mi (9,091.24 km) |
| Gladstone to Knezha | 5,559.05 mi (8,946.42 km) |
| Gladstone to Kostinbrod | 5,562.88 mi (8,952.59 km) |
| Gladstone to Kozloduy | 5,532.81 mi (8,904.19 km) |
| Gladstone to Kyustendil | 5,570.41 mi (8,964.70 km) |
| Gladstone to Levski | 5,601.86 mi (9,015.33 km) |
| Gladstone to Lom | 5,513.53 mi (8,873.17 km) |
| Gladstone to Lovech | 5,599.28 mi (9,011.17 km) |
| Gladstone to Lukovit | 5,576.96 mi (8,975.25 km) |
| Gladstone to Lyaskovets | 5,635.33 mi (9,069.19 km) |
| Gladstone to Mezdra | 5,563.23 mi (8,953.15 km) |
| Gladstone to Momchilgrad | 5,704.67 mi (9,180.77 km) |
