| Seia to Devnya | 1,812.78 mi (2,917.38 km) |
| Seia to Dimitrovgrad | 1,723.05 mi (2,772.98 km) |
| Seia to Dobrich | 1,823.64 mi (2,934.87 km) |
| Seia to Dospat | 1,653.61 mi (2,661.24 km) |
| Seia to Dupnitsa | 1,595.09 mi (2,567.05 km) |
| Seia to Elhovo | 1,771.09 mi (2,850.29 km) |
| Seia to Etropole | 1,636.03 mi (2,632.93 km) |
| Seia to Gabrovo | 1,703.06 mi (2,740.81 km) |
| Seia to Gorna Oryahovitsa | 1,719.75 mi (2,767.67 km) |
| Seia to Gotse Delchev | 1,632.21 mi (2,626.78 km) |
| Seia to Harmanli | 1,739.40 mi (2,799.29 km) |
| Seia to Haskovo | 1,722.43 mi (2,771.98 km) |
| Seia to Ihtiman | 1,629.32 mi (2,622.14 km) |
| Seia to Isperih | 1,772.92 mi (2,853.24 km) |
| Seia to Kardzhali | 1,714.96 mi (2,759.96 km) |
