| Orpington to Devnya | 1,394.48 mi (2,244.21 km) |
| Orpington to Dimitrovgrad | 1,359.29 mi (2,187.56 km) |
| Orpington to Dobrich | 1,392.55 mi (2,241.09 km) |
| Orpington to Dospat | 1,318.08 mi (2,121.25 km) |
| Orpington to Dupnitsa | 1,249.48 mi (2,010.85 km) |
| Orpington to Elhovo | 1,394.24 mi (2,243.81 km) |
| Orpington to Etropole | 1,261.53 mi (2,030.23 km) |
| Orpington to Gabrovo | 1,315.01 mi (2,116.30 km) |
| Orpington to Gorna Oryahovitsa | 1,319.67 mi (2,123.80 km) |
| Orpington to Gotse Delchev | 1,304.33 mi (2,099.12 km) |
| Orpington to Harmanli | 1,376.44 mi (2,215.17 km) |
| Orpington to Haskovo | 1,362.80 mi (2,193.21 km) |
| Orpington to Ihtiman | 1,270.40 mi (2,044.51 km) |
| Orpington to Isperih | 1,344.83 mi (2,164.29 km) |
| Orpington to Kardzhali | 1,366.61 mi (2,199.34 km) |
