| Potters Bar to Nowy Dwor Mazowiecki | 886.08 mi (1,426.00 km) |
| Potters Bar to Nowy Sacz | 922.41 mi (1,484.48 km) |
| Potters Bar to Nowy Targ | 896.50 mi (1,442.78 km) |
| Potters Bar to Nowy Tomysl | 693.79 mi (1,116.54 km) |
| Potters Bar to Nysa | 763.12 mi (1,228.12 km) |
| Potters Bar to Oborniki | 721.62 mi (1,161.34 km) |
| Potters Bar to Oborniki Slaskie | 733.71 mi (1,180.79 km) |
| Potters Bar to Olawa | 755.04 mi (1,215.12 km) |
| Potters Bar to Olecko | 955.49 mi (1,537.72 km) |
| Potters Bar to Olesnica | 755.35 mi (1,215.62 km) |
| Potters Bar to Olesno | 803.56 mi (1,293.21 km) |
| Potters Bar to Olkusz | 861.75 mi (1,386.85 km) |
| Potters Bar to Olsztyn | 873.01 mi (1,404.97 km) |
| Potters Bar to Opalenica | 705.64 mi (1,135.63 km) |
| Potters Bar to Opoczno | 877.11 mi (1,411.57 km) |
