| Soure to Karlovo | 1,732.43 mi (2,788.07 km) |
| Soure to Karnobat | 1,842.49 mi (2,965.19 km) |
| Soure to Kavarna | 1,904.28 mi (3,064.65 km) |
| Soure to Kazanlak | 1,762.60 mi (2,836.63 km) |
| Soure to Knezha | 1,691.48 mi (2,722.18 km) |
| Soure to Kostinbrod | 1,650.98 mi (2,657.00 km) |
| Soure to Kozloduy | 1,673.04 mi (2,692.50 km) |
| Soure to Kyustendil | 1,626.95 mi (2,618.33 km) |
| Soure to Levski | 1,744.65 mi (2,807.74 km) |
| Soure to Lom | 1,648.22 mi (2,652.56 km) |
| Soure to Lovech | 1,724.96 mi (2,776.05 km) |
| Soure to Lukovit | 1,696.96 mi (2,731.00 km) |
| Soure to Lyaskovets | 1,775.40 mi (2,857.22 km) |
| Soure to Mezdra | 1,673.73 mi (2,693.61 km) |
| Soure to Momchilgrad | 1,772.56 mi (2,852.66 km) |
