| Bolton to Devnya | 1,535.24 mi (2,470.73 km) |
| Bolton to Dimitrovgrad | 1,510.17 mi (2,430.38 km) |
| Bolton to Dobrich | 1,530.95 mi (2,463.83 km) |
| Bolton to Dospat | 1,474.15 mi (2,372.41 km) |
| Bolton to Dupnitsa | 1,405.76 mi (2,262.36 km) |
| Bolton to Elhovo | 1,542.21 mi (2,481.95 km) |
| Bolton to Etropole | 1,413.13 mi (2,274.21 km) |
| Bolton to Gabrovo | 1,463.03 mi (2,354.52 km) |
| Bolton to Gorna Oryahovitsa | 1,465.53 mi (2,358.55 km) |
| Bolton to Gotse Delchev | 1,461.80 mi (2,352.53 km) |
| Bolton to Harmanli | 1,527.05 mi (2,457.55 km) |
| Bolton to Haskovo | 1,514.24 mi (2,436.93 km) |
| Bolton to Ihtiman | 1,424.18 mi (2,292.00 km) |
| Bolton to Isperih | 1,484.99 mi (2,389.87 km) |
| Bolton to Kardzhali | 1,519.69 mi (2,445.70 km) |
