| Gladstone to Devnya | 5,691.74 mi (9,159.98 km) |
| Gladstone to Dimitrovgrad | 5,684.76 mi (9,148.74 km) |
| Gladstone to Dobrich | 5,682.45 mi (9,145.02 km) |
| Gladstone to Dospat | 5,654.74 mi (9,100.42 km) |
| Gladstone to Dupnitsa | 5,586.81 mi (8,991.11 km) |
| Gladstone to Elhovo | 5,712.11 mi (9,192.75 km) |
| Gladstone to Etropole | 5,589.52 mi (8,995.47 km) |
| Gladstone to Gabrovo | 5,634.05 mi (9,067.13 km) |
| Gladstone to Gorna Oryahovitsa | 5,633.07 mi (9,065.55 km) |
| Gladstone to Gotse Delchev | 5,643.51 mi (9,082.36 km) |
| Gladstone to Harmanli | 5,701.11 mi (9,175.05 km) |
| Gladstone to Haskovo | 5,689.55 mi (9,156.44 km) |
| Gladstone to Ihtiman | 5,602.90 mi (9,016.99 km) |
| Gladstone to Isperih | 5,641.49 mi (9,079.09 km) |
| Gladstone to Kardzhali | 5,696.98 mi (9,168.41 km) |
