| Drobeta-Turnu Severin to Odessa (Texas) | 6,121.38 mi (9,851.42 km) |
| Drobeta-Turnu Severin to Ogden (Utah) | 5,873.09 mi (9,451.83 km) |
| Drobeta-Turnu Severin to Oildale (California) | 6,407.12 mi (10,311.26 km) |
| Drobeta-Turnu Severin to Ojus (Florida) | 5,559.66 mi (8,947.41 km) |
| Drobeta-Turnu Severin to Okemos (Michigan) | 4,916.12 mi (7,911.73 km) |
| Drobeta-Turnu Severin to Oklahoma City (Oklahoma) | 5,756.39 mi (9,264.01 km) |
| Drobeta-Turnu Severin to Okmulgee (Oklahoma) | 5,695.60 mi (9,166.18 km) |
| Drobeta-Turnu Severin to Olathe (Kansas) | 5,479.76 mi (8,818.83 km) |
| Drobeta-Turnu Severin to Old Jamestown (Missouri) | 5,321.56 mi (8,564.22 km) |
| Drobeta-Turnu Severin to Oldsmar (Florida) | 5,564.39 mi (8,955.02 km) |
| Drobeta-Turnu Severin to Olean (New York) | 4,720.82 mi (7,597.43 km) |
| Drobeta-Turnu Severin to Olive Branch (Mississippi) | 5,504.20 mi (8,858.16 km) |
| Drobeta-Turnu Severin to Olivehurst (California) | 6,238.90 mi (10,040.54 km) |
| Drobeta-Turnu Severin to Olney (Maryland) | 4,801.41 mi (7,727.12 km) |
| Drobeta-Turnu Severin to Olympia (Washington) | 5,764.92 mi (9,277.75 km) |
