| Houghton le Spring to Devnya | 1,524.64 mi (2,453.66 km) |
| Houghton le Spring to Dimitrovgrad | 1,507.71 mi (2,426.42 km) |
| Houghton le Spring to Dobrich | 1,518.62 mi (2,443.98 km) |
| Houghton le Spring to Dospat | 1,476.36 mi (2,375.96 km) |
| Houghton le Spring to Dupnitsa | 1,408.50 mi (2,266.75 km) |
| Houghton le Spring to Elhovo | 1,537.21 mi (2,473.90 km) |
| Houghton le Spring to Etropole | 1,411.75 mi (2,271.99 km) |
| Houghton le Spring to Gabrovo | 1,458.44 mi (2,347.14 km) |
| Houghton le Spring to Gorna Oryahovitsa | 1,459.21 mi (2,348.37 km) |
| Houghton le Spring to Gotse Delchev | 1,465.33 mi (2,358.22 km) |
| Houghton le Spring to Harmanli | 1,524.28 mi (2,453.10 km) |
| Houghton le Spring to Haskovo | 1,512.23 mi (2,433.70 km) |
| Houghton le Spring to Ihtiman | 1,424.61 mi (2,292.69 km) |
| Houghton le Spring to Isperih | 1,474.20 mi (2,372.49 km) |
| Houghton le Spring to Kardzhali | 1,519.05 mi (2,444.68 km) |
