| Soure to Montana | 1,648.67 mi (2,653.28 km) |
| Soure to Nova Zagora | 1,794.62 mi (2,888.16 km) |
| Soure to Novi Iskar | 1,657.80 mi (2,667.98 km) |
| Soure to Novi Pazar | 1,848.21 mi (2,974.40 km) |
| Soure to Omurtag | 1,810.58 mi (2,913.85 km) |
| Soure to Panagyurishte | 1,701.77 mi (2,738.74 km) |
| Soure to Parvomay | 1,757.25 mi (2,828.02 km) |
| Soure to Pavlikeni | 1,754.74 mi (2,823.98 km) |
| Soure to Pazardzhik | 1,711.50 mi (2,754.40 km) |
| Soure to Pernik | 1,642.86 mi (2,643.93 km) |
| Soure to Peshtera | 1,711.09 mi (2,753.73 km) |
| Soure to Petrich | 1,660.49 mi (2,672.29 km) |
| Soure to Pleven | 1,718.76 mi (2,766.07 km) |
| Soure to Plovdiv | 1,733.09 mi (2,789.14 km) |
| Soure to Pomorie | 1,875.01 mi (3,017.53 km) |
