| Merthyr Tudful to Nowy Dwor Mazowiecki | 1,019.29 mi (1,640.38 km) |
| Merthyr Tudful to Nowy Sacz | 1,059.13 mi (1,704.51 km) |
| Merthyr Tudful to Nowy Targ | 1,033.28 mi (1,662.90 km) |
| Merthyr Tudful to Nowy Tomysl | 827.85 mi (1,332.29 km) |
| Merthyr Tudful to Nysa | 899.73 mi (1,447.97 km) |
| Merthyr Tudful to Oborniki | 854.74 mi (1,375.57 km) |
| Merthyr Tudful to Oborniki Slaskie | 869.59 mi (1,399.48 km) |
| Merthyr Tudful to Olawa | 891.30 mi (1,434.41 km) |
| Merthyr Tudful to Olecko | 1,084.13 mi (1,744.73 km) |
| Merthyr Tudful to Olesnica | 891.30 mi (1,434.41 km) |
| Merthyr Tudful to Olesno | 939.74 mi (1,512.36 km) |
| Merthyr Tudful to Olkusz | 998.27 mi (1,606.56 km) |
| Merthyr Tudful to Olsztyn | 1,002.50 mi (1,613.38 km) |
| Merthyr Tudful to Opalenica | 839.70 mi (1,351.36 km) |
| Merthyr Tudful to Opoczno | 1,012.37 mi (1,629.25 km) |
