| Ramnicu Valcea to Oakley (California) | 6,319.22 mi (10,169.80 km) |
| Ramnicu Valcea to Oakton (Virginia) | 4,872.18 mi (7,841.01 km) |
| Ramnicu Valcea to Oakville (Missouri) | 5,382.70 mi (8,662.62 km) |
| Ramnicu Valcea to Oatfield (Oregon) | 5,865.18 mi (9,439.10 km) |
| Ramnicu Valcea to Ocala (Florida) | 5,541.88 mi (8,918.79 km) |
| Ramnicu Valcea to Ocean Acres (New Jersey) | 4,712.75 mi (7,584.44 km) |
| Ramnicu Valcea to Ocean City (New Jersey) | 4,747.31 mi (7,640.06 km) |
| Ramnicu Valcea to Ocean Pines (Maryland) | 4,809.91 mi (7,740.81 km) |
| Ramnicu Valcea to Ocean Pointe (Hawaii) | 7,845.17 mi (12,625.58 km) |
| Ramnicu Valcea to Ocean Springs (Mississippi) | 5,745.65 mi (9,246.74 km) |
| Ramnicu Valcea to Oceanside (California) | 6,516.01 mi (10,486.50 km) |
| Ramnicu Valcea to Oceanside (New York) | 4,646.76 mi (7,478.23 km) |
| Ramnicu Valcea to Ocoee (Florida) | 5,546.19 mi (8,925.73 km) |
| Ramnicu Valcea to Oconomowoc (Wisconsin) | 5,079.53 mi (8,174.71 km) |
| Ramnicu Valcea to Odenton (Maryland) | 4,839.87 mi (7,789.02 km) |
