| Hertford to Montana | 1,222.96 mi (1,968.16 km) |
| Hertford to Nova Zagora | 1,374.06 mi (2,211.33 km) |
| Hertford to Novi Iskar | 1,253.46 mi (2,017.25 km) |
| Hertford to Novi Pazar | 1,388.21 mi (2,234.11 km) |
| Hertford to Omurtag | 1,365.74 mi (2,197.95 km) |
| Hertford to Panagyurishte | 1,299.61 mi (2,091.51 km) |
| Hertford to Parvomay | 1,358.22 mi (2,185.84 km) |
| Hertford to Pavlikeni | 1,315.06 mi (2,116.38 km) |
| Hertford to Pazardzhik | 1,318.46 mi (2,121.86 km) |
| Hertford to Pernik | 1,249.37 mi (2,010.66 km) |
| Hertford to Peshtera | 1,324.34 mi (2,131.32 km) |
| Hertford to Petrich | 1,309.57 mi (2,107.55 km) |
| Hertford to Pleven | 1,279.75 mi (2,059.56 km) |
| Hertford to Plovdiv | 1,337.31 mi (2,152.19 km) |
| Hertford to Pomorie | 1,436.55 mi (2,311.90 km) |
