| Waltham to Devnya | 4,678.68 mi (7,529.61 km) |
| Waltham to Dimitrovgrad | 4,648.73 mi (7,481.41 km) |
| Waltham to Dobrich | 4,674.37 mi (7,522.67 km) |
| Waltham to Dospat | 4,606.53 mi (7,413.49 km) |
| Waltham to Dupnitsa | 4,537.96 mi (7,303.14 km) |
| Waltham to Elhovo | 4,683.09 mi (7,536.71 km) |
| Waltham to Etropole | 4,550.99 mi (7,324.11 km) |
| Waltham to Gabrovo | 4,603.82 mi (7,409.13 km) |
| Waltham to Gorna Oryahovitsa | 4,607.54 mi (7,415.12 km) |
| Waltham to Gotse Delchev | 4,592.02 mi (7,390.14 km) |
| Waltham to Harmanli | 4,665.86 mi (7,508.98 km) |
| Waltham to Haskovo | 4,652.26 mi (7,487.09 km) |
| Waltham to Ihtiman | 4,559.67 mi (7,338.09 km) |
| Waltham to Isperih | 4,628.46 mi (7,448.78 km) |
| Waltham to Kardzhali | 4,655.95 mi (7,493.03 km) |
