| Potters Bar to Noventa Vicentina | 694.45 mi (1,117.60 km) |
| Potters Bar to Novi di Modena | 691.90 mi (1,113.50 km) |
| Potters Bar to Novi Ligure | 631.72 mi (1,016.65 km) |
| Potters Bar to Nuoro | 907.63 mi (1,460.69 km) |
| Potters Bar to Occhiobello | 713.64 mi (1,148.48 km) |
| Potters Bar to Oderzo | 706.07 mi (1,136.31 km) |
| Potters Bar to Oggiono | 595.50 mi (958.36 km) |
| Potters Bar to Olbia | 874.94 mi (1,408.08 km) |
| Potters Bar to Oleggio | 581.86 mi (936.41 km) |
| Potters Bar to Olgiate Comasco | 582.97 mi (938.20 km) |
| Potters Bar to Olgiate Olona | 588.02 mi (946.33 km) |
| Potters Bar to Omegna | 560.17 mi (901.51 km) |
| Potters Bar to Opera | 611.65 mi (984.36 km) |
| Potters Bar to Oppeano | 681.44 mi (1,096.67 km) |
| Potters Bar to Orbassano | 581.86 mi (936.41 km) |
