| Drobeta-Turnu Severin to Oakley (California) | 6,310.30 mi (10,155.45 km) |
| Drobeta-Turnu Severin to Oakton (Virginia) | 4,822.47 mi (7,761.02 km) |
| Drobeta-Turnu Severin to Oakville (Missouri) | 5,342.86 mi (8,598.51 km) |
| Drobeta-Turnu Severin to Oatfield (Oregon) | 5,861.92 mi (9,433.85 km) |
| Drobeta-Turnu Severin to Ocala (Florida) | 5,486.64 mi (8,829.90 km) |
| Drobeta-Turnu Severin to Ocean Acres (New Jersey) | 4,661.77 mi (7,502.39 km) |
| Drobeta-Turnu Severin to Ocean City (New Jersey) | 4,696.05 mi (7,557.56 km) |
| Drobeta-Turnu Severin to Ocean Pines (Maryland) | 4,758.12 mi (7,657.45 km) |
| Drobeta-Turnu Severin to Ocean Pointe (Hawaii) | 7,880.04 mi (12,681.70 km) |
| Drobeta-Turnu Severin to Ocean Springs (Mississippi) | 5,697.05 mi (9,168.52 km) |
| Drobeta-Turnu Severin to Oceanside (California) | 6,498.85 mi (10,458.90 km) |
| Drobeta-Turnu Severin to Oceanside (New York) | 4,596.28 mi (7,397.00 km) |
| Drobeta-Turnu Severin to Ocoee (Florida) | 5,489.94 mi (8,835.20 km) |
| Drobeta-Turnu Severin to Oconomowoc (Wisconsin) | 5,042.83 mi (8,115.65 km) |
| Drobeta-Turnu Severin to Odenton (Maryland) | 4,789.90 mi (7,708.61 km) |
