| Seaham to Popovo | 1,463.97 mi (2,356.04 km) |
| Seaham to Provadia | 1,516.38 mi (2,440.37 km) |
| Seaham to Radnevo | 1,502.94 mi (2,418.74 km) |
| Seaham to Radomir | 1,383.77 mi (2,226.97 km) |
| Seaham to Rakitovo | 1,452.11 mi (2,336.94 km) |
| Seaham to Rakovski | 1,468.48 mi (2,363.29 km) |
| Seaham to Razgrad | 1,465.99 mi (2,359.28 km) |
| Seaham to Razlog | 1,435.42 mi (2,310.08 km) |
| Seaham to Ruse | 1,431.68 mi (2,304.07 km) |
| Seaham to Samokov | 1,415.75 mi (2,278.44 km) |
| Seaham to Sandanski | 1,445.02 mi (2,325.54 km) |
| Seaham to Sevlievo | 1,438.12 mi (2,314.43 km) |
| Seaham to Shumen | 1,493.08 mi (2,402.89 km) |
| Seaham to Silistra | 1,467.31 mi (2,361.41 km) |
| Seaham to Sliven | 1,499.12 mi (2,412.60 km) |
