| Helston to Devnya | 1,613.34 mi (2,596.42 km) |
| Helston to Dimitrovgrad | 1,567.08 mi (2,521.97 km) |
| Helston to Dobrich | 1,613.67 mi (2,596.95 km) |
| Helston to Dospat | 1,519.18 mi (2,444.89 km) |
| Helston to Dupnitsa | 1,450.97 mi (2,335.11 km) |
| Helston to Elhovo | 1,605.31 mi (2,583.49 km) |
| Helston to Etropole | 1,469.30 mi (2,364.61 km) |
| Helston to Gabrovo | 1,526.67 mi (2,456.93 km) |
| Helston to Gorna Oryahovitsa | 1,533.75 mi (2,468.34 km) |
| Helston to Gotse Delchev | 1,503.48 mi (2,419.62 km) |
| Helston to Harmanli | 1,584.43 mi (2,549.89 km) |
| Helston to Haskovo | 1,569.84 mi (2,526.41 km) |
| Helston to Ihtiman | 1,475.20 mi (2,374.10 km) |
| Helston to Isperih | 1,564.61 mi (2,517.99 km) |
| Helston to Kardzhali | 1,571.46 mi (2,529.02 km) |
