| Rickmansworth to Nasaud | 1,150.56 mi (1,851.65 km) |
| Rickmansworth to Navodari | 1,425.26 mi (2,293.73 km) |
| Rickmansworth to Negresti-Oas | 1,092.40 mi (1,758.05 km) |
| Rickmansworth to Nehoiu | 1,291.65 mi (2,078.71 km) |
| Rickmansworth to Ocna Mures | 1,154.14 mi (1,857.41 km) |
| Rickmansworth to Odobesti | 1,310.29 mi (2,108.70 km) |
| Rickmansworth to Odorheiu Secuiesc | 1,217.75 mi (1,959.77 km) |
| Rickmansworth to Oltenita | 1,350.46 mi (2,173.36 km) |
| Rickmansworth to Onesti | 1,281.97 mi (2,063.13 km) |
| Rickmansworth to Oradea | 1,050.94 mi (1,691.32 km) |
| Rickmansworth to Orastie | 1,143.84 mi (1,840.83 km) |
| Rickmansworth to Oravita | 1,109.11 mi (1,784.95 km) |
| Rickmansworth to Orsova | 1,150.16 mi (1,851.00 km) |
| Rickmansworth to Otelu Rosu | 1,119.68 mi (1,801.95 km) |
| Rickmansworth to Otopeni | 1,309.77 mi (2,107.88 km) |
