| Seclin to Devnya | 1,257.09 mi (2,023.10 km) |
| Seclin to Dimitrovgrad | 1,220.10 mi (1,963.56 km) |
| Seclin to Dobrich | 1,255.73 mi (2,020.90 km) |
| Seclin to Dospat | 1,178.45 mi (1,896.53 km) |
| Seclin to Dupnitsa | 1,109.85 mi (1,786.12 km) |
| Seclin to Elhovo | 1,255.44 mi (2,020.44 km) |
| Seclin to Etropole | 1,122.29 mi (1,806.15 km) |
| Seclin to Gabrovo | 1,176.25 mi (1,892.98 km) |
| Seclin to Gorna Oryahovitsa | 1,181.28 mi (1,901.08 km) |
| Seclin to Gotse Delchev | 1,164.64 mi (1,874.31 km) |
| Seclin to Harmanli | 1,237.28 mi (1,991.20 km) |
| Seclin to Haskovo | 1,223.54 mi (1,969.09 km) |
| Seclin to Ihtiman | 1,130.93 mi (1,820.06 km) |
| Seclin to Isperih | 1,207.63 mi (1,943.49 km) |
| Seclin to Kardzhali | 1,227.18 mi (1,974.95 km) |
