| Seclin to Karlovo | 1,163.24 mi (1,872.05 km) |
| Seclin to Karnobat | 1,254.48 mi (2,018.89 km) |
| Seclin to Kavarna | 1,281.92 mi (2,063.06 km) |
| Seclin to Kazanlak | 1,188.89 mi (1,913.34 km) |
| Seclin to Knezha | 1,099.57 mi (1,769.58 km) |
| Seclin to Kostinbrod | 1,090.83 mi (1,755.52 km) |
| Seclin to Kozloduy | 1,074.19 mi (1,728.74 km) |
| Seclin to Kyustendil | 1,091.56 mi (1,756.69 km) |
| Seclin to Levski | 1,148.59 mi (1,848.48 km) |
| Seclin to Lom | 1,051.90 mi (1,692.86 km) |
| Seclin to Lovech | 1,140.10 mi (1,834.81 km) |
| Seclin to Lukovit | 1,114.64 mi (1,793.85 km) |
| Seclin to Lyaskovets | 1,183.25 mi (1,904.26 km) |
| Seclin to Mezdra | 1,097.28 mi (1,765.89 km) |
| Seclin to Momchilgrad | 1,234.16 mi (1,986.19 km) |
