| Ramnicu Valcea to Oswego (Illinois) | 5,146.11 mi (8,281.86 km) |
| Ramnicu Valcea to Oswego (New York) | 4,630.19 mi (7,451.56 km) |
| Ramnicu Valcea to Otsego (Minnesota) | 5,135.90 mi (8,265.43 km) |
| Ramnicu Valcea to Ottawa (Illinois) | 5,179.89 mi (8,336.22 km) |
| Ramnicu Valcea to Ottawa (Kansas) | 5,545.50 mi (8,924.62 km) |
| Ramnicu Valcea to Ottumwa (Iowa) | 5,320.49 mi (8,562.50 km) |
| Ramnicu Valcea to Overland (Missouri) | 5,371.46 mi (8,644.54 km) |
| Ramnicu Valcea to Overland Park (Kansas) | 5,510.58 mi (8,868.43 km) |
| Ramnicu Valcea to Overlea (Maryland) | 4,819.00 mi (7,755.44 km) |
| Ramnicu Valcea to Oviedo (Florida) | 5,527.80 mi (8,896.13 km) |
| Ramnicu Valcea to Owasso (Oklahoma) | 5,690.23 mi (9,157.54 km) |
| Ramnicu Valcea to Owatonna (Minnesota) | 5,185.40 mi (8,345.09 km) |
| Ramnicu Valcea to Owensboro (Kentucky) | 5,302.44 mi (8,533.45 km) |
| Ramnicu Valcea to Owings Mills (Maryland) | 4,827.59 mi (7,769.26 km) |
| Ramnicu Valcea to Owosso (Michigan) | 4,933.76 mi (7,940.12 km) |
