| Potters Bar to Nasaud | 1,138.89 mi (1,832.87 km) |
| Potters Bar to Navodari | 1,413.98 mi (2,275.58 km) |
| Potters Bar to Negresti-Oas | 1,080.65 mi (1,739.14 km) |
| Potters Bar to Nehoiu | 1,280.35 mi (2,060.53 km) |
| Potters Bar to Ocna Mures | 1,142.81 mi (1,839.17 km) |
| Potters Bar to Odobesti | 1,298.79 mi (2,090.21 km) |
| Potters Bar to Odorheiu Secuiesc | 1,206.28 mi (1,941.32 km) |
| Potters Bar to Oltenita | 1,339.49 mi (2,155.70 km) |
| Potters Bar to Onesti | 1,270.37 mi (2,044.46 km) |
| Potters Bar to Oradea | 1,039.60 mi (1,673.07 km) |
| Potters Bar to Orastie | 1,132.77 mi (1,823.02 km) |
| Potters Bar to Oravita | 1,098.57 mi (1,767.98 km) |
| Potters Bar to Orsova | 1,139.61 mi (1,834.03 km) |
| Potters Bar to Otelu Rosu | 1,108.85 mi (1,784.52 km) |
| Potters Bar to Otopeni | 1,298.74 mi (2,090.12 km) |
