| Viljandi to Devnya | 1,050.17 mi (1,690.08 km) |
| Viljandi to Dimitrovgrad | 1,127.37 mi (1,814.33 km) |
| Viljandi to Dobrich | 1,027.04 mi (1,652.87 km) |
| Viljandi to Dospat | 1,156.70 mi (1,861.53 km) |
| Viljandi to Dupnitsa | 1,117.70 mi (1,798.77 km) |
| Viljandi to Elhovo | 1,120.10 mi (1,802.62 km) |
| Viljandi to Etropole | 1,075.47 mi (1,730.80 km) |
| Viljandi to Gabrovo | 1,071.01 mi (1,723.62 km) |
| Viljandi to Gorna Oryahovitsa | 1,052.53 mi (1,693.89 km) |
| Viljandi to Gotse Delchev | 1,163.62 mi (1,872.66 km) |
| Viljandi to Harmanli | 1,135.51 mi (1,827.43 km) |
| Viljandi to Haskovo | 1,135.44 mi (1,827.31 km) |
| Viljandi to Ihtiman | 1,103.31 mi (1,775.61 km) |
| Viljandi to Isperih | 1,013.59 mi (1,631.22 km) |
| Viljandi to Kardzhali | 1,155.06 mi (1,858.88 km) |
