| Seaham to Devnya | 1,519.82 mi (2,445.91 km) |
| Seaham to Dimitrovgrad | 1,503.05 mi (2,418.93 km) |
| Seaham to Dobrich | 1,513.77 mi (2,436.18 km) |
| Seaham to Dospat | 1,471.81 mi (2,368.65 km) |
| Seaham to Dupnitsa | 1,403.97 mi (2,259.46 km) |
| Seaham to Elhovo | 1,532.50 mi (2,466.32 km) |
| Seaham to Etropole | 1,407.12 mi (2,264.55 km) |
| Seaham to Gabrovo | 1,453.75 mi (2,339.58 km) |
| Seaham to Gorna Oryahovitsa | 1,454.47 mi (2,340.75 km) |
| Seaham to Gotse Delchev | 1,460.81 mi (2,350.95 km) |
| Seaham to Harmanli | 1,519.62 mi (2,445.60 km) |
| Seaham to Haskovo | 1,507.59 mi (2,426.23 km) |
| Seaham to Ihtiman | 1,420.03 mi (2,285.31 km) |
| Seaham to Isperih | 1,469.38 mi (2,364.74 km) |
| Seaham to Kardzhali | 1,514.44 mi (2,437.25 km) |
