| Rheinberg to Navodari | 1,128.76 mi (1,816.57 km) |
| Rheinberg to Negresti-Oas | 791.36 mi (1,273.56 km) |
| Rheinberg to Nehoiu | 995.10 mi (1,601.46 km) |
| Rheinberg to Ocna Mures | 857.39 mi (1,379.83 km) |
| Rheinberg to Odobesti | 1,011.52 mi (1,627.88 km) |
| Rheinberg to Odorheiu Secuiesc | 919.36 mi (1,479.56 km) |
| Rheinberg to Oltenita | 1,057.97 mi (1,702.65 km) |
| Rheinberg to Onesti | 982.19 mi (1,580.69 km) |
| Rheinberg to Oradea | 754.33 mi (1,213.98 km) |
| Rheinberg to Orastie | 850.52 mi (1,368.78 km) |
| Rheinberg to Oravita | 823.96 mi (1,326.04 km) |
| Rheinberg to Orsova | 864.74 mi (1,391.67 km) |
| Rheinberg to Otelu Rosu | 829.90 mi (1,335.60 km) |
| Rheinberg to Otopeni | 1,016.54 mi (1,635.96 km) |
| Rheinberg to Ovidiu | 1,128.56 mi (1,816.25 km) |
