| Rickmansworth to Noventa Vicentina | 702.10 mi (1,129.92 km) |
| Rickmansworth to Novi di Modena | 698.93 mi (1,124.82 km) |
| Rickmansworth to Novi Ligure | 637.33 mi (1,025.68 km) |
| Rickmansworth to Nuoro | 911.03 mi (1,466.16 km) |
| Rickmansworth to Occhiobello | 721.05 mi (1,160.41 km) |
| Rickmansworth to Oderzo | 714.52 mi (1,149.91 km) |
| Rickmansworth to Oggiono | 602.33 mi (969.36 km) |
| Rickmansworth to Olbia | 878.71 mi (1,414.15 km) |
| Rickmansworth to Oleggio | 588.05 mi (946.38 km) |
| Rickmansworth to Olgiate Comasco | 589.55 mi (948.80 km) |
| Rickmansworth to Olgiate Olona | 594.42 mi (956.63 km) |
| Rickmansworth to Omegna | 566.46 mi (911.62 km) |
| Rickmansworth to Opera | 618.06 mi (994.67 km) |
| Rickmansworth to Oppeano | 688.93 mi (1,108.72 km) |
| Rickmansworth to Orbassano | 586.72 mi (944.24 km) |
