| Blackwells Mills to Montana | 4,714.16 mi (7,586.70 km) |
| Blackwells Mills to Nova Zagora | 4,865.27 mi (7,829.90 km) |
| Blackwells Mills to Novi Iskar | 4,744.01 mi (7,634.74 km) |
| Blackwells Mills to Novi Pazar | 4,876.49 mi (7,847.95 km) |
| Blackwells Mills to Omurtag | 4,855.85 mi (7,814.74 km) |
| Blackwells Mills to Panagyurishte | 4,790.41 mi (7,709.42 km) |
| Blackwells Mills to Parvomay | 4,849.24 mi (7,804.10 km) |
| Blackwells Mills to Pavlikeni | 4,805.93 mi (7,734.40 km) |
| Blackwells Mills to Pazardzhik | 4,808.92 mi (7,739.21 km) |
| Blackwells Mills to Pernik | 4,739.11 mi (7,626.86 km) |
| Blackwells Mills to Peshtera | 4,814.44 mi (7,748.09 km) |
| Blackwells Mills to Petrich | 4,795.41 mi (7,717.47 km) |
| Blackwells Mills to Pleven | 4,770.85 mi (7,677.94 km) |
| Blackwells Mills to Plovdiv | 4,828.07 mi (7,770.03 km) |
| Blackwells Mills to Pomorie | 4,926.39 mi (7,928.25 km) |
