| Billingham to Devnya | 1,511.85 mi (2,433.09 km) |
| Billingham to Dimitrovgrad | 1,493.90 mi (2,404.20 km) |
| Billingham to Dobrich | 1,506.06 mi (2,423.77 km) |
| Billingham to Dospat | 1,462.00 mi (2,352.87 km) |
| Billingham to Dupnitsa | 1,394.07 mi (2,243.54 km) |
| Billingham to Elhovo | 1,523.71 mi (2,452.18 km) |
| Billingham to Etropole | 1,397.79 mi (2,249.53 km) |
| Billingham to Gabrovo | 1,444.88 mi (2,325.31 km) |
| Billingham to Gorna Oryahovitsa | 1,445.86 mi (2,326.88 km) |
| Billingham to Gotse Delchev | 1,450.83 mi (2,334.88 km) |
| Billingham to Harmanli | 1,510.52 mi (2,430.94 km) |
| Billingham to Haskovo | 1,498.37 mi (2,411.40 km) |
| Billingham to Ihtiman | 1,410.45 mi (2,269.90 km) |
| Billingham to Isperih | 1,461.42 mi (2,351.93 km) |
| Billingham to Kardzhali | 1,505.03 mi (2,422.11 km) |
