| Seia to Montana | 1,594.01 mi (2,565.31 km) |
| Seia to Nova Zagora | 1,740.27 mi (2,800.69 km) |
| Seia to Novi Iskar | 1,603.40 mi (2,580.42 km) |
| Seia to Novi Pazar | 1,793.49 mi (2,886.34 km) |
| Seia to Omurtag | 1,755.97 mi (2,825.96 km) |
| Seia to Panagyurishte | 1,647.48 mi (2,651.37 km) |
| Seia to Parvomay | 1,703.11 mi (2,740.89 km) |
| Seia to Pavlikeni | 1,700.10 mi (2,736.05 km) |
| Seia to Pazardzhik | 1,657.35 mi (2,667.25 km) |
| Seia to Pernik | 1,588.56 mi (2,556.54 km) |
| Seia to Peshtera | 1,657.02 mi (2,666.72 km) |
| Seia to Petrich | 1,606.83 mi (2,585.95 km) |
| Seia to Pleven | 1,664.07 mi (2,678.06 km) |
| Seia to Plovdiv | 1,678.95 mi (2,702.01 km) |
| Seia to Pomorie | 1,820.56 mi (2,929.91 km) |
