| Merthyr Tudful to Montana | 1,356.98 mi (2,183.84 km) |
| Merthyr Tudful to Nova Zagora | 1,509.07 mi (2,428.61 km) |
| Merthyr Tudful to Novi Iskar | 1,386.40 mi (2,231.19 km) |
| Merthyr Tudful to Novi Pazar | 1,525.41 mi (2,454.91 km) |
| Merthyr Tudful to Omurtag | 1,502.04 mi (2,417.29 km) |
| Merthyr Tudful to Panagyurishte | 1,432.86 mi (2,305.97 km) |
| Merthyr Tudful to Parvomay | 1,491.80 mi (2,400.83 km) |
| Merthyr Tudful to Pavlikeni | 1,450.71 mi (2,334.69 km) |
| Merthyr Tudful to Pazardzhik | 1,451.30 mi (2,335.64 km) |
| Merthyr Tudful to Pernik | 1,381.53 mi (2,223.35 km) |
| Merthyr Tudful to Peshtera | 1,456.82 mi (2,344.53 km) |
| Merthyr Tudful to Petrich | 1,439.37 mi (2,316.44 km) |
| Merthyr Tudful to Pleven | 1,415.09 mi (2,277.36 km) |
| Merthyr Tudful to Plovdiv | 1,470.51 mi (2,366.55 km) |
| Merthyr Tudful to Pomorie | 1,572.96 mi (2,531.44 km) |
