| Bargoed to Oakley (California) | 5,217.14 mi (8,396.18 km) |
| Bargoed to Oakton (Virginia) | 3,545.09 mi (5,705.26 km) |
| Bargoed to Oakville (Missouri) | 4,087.56 mi (6,578.30 km) |
| Bargoed to Oatfield (Oregon) | 4,821.87 mi (7,760.05 km) |
| Bargoed to Ocala (Florida) | 4,206.38 mi (6,769.51 km) |
| Bargoed to Ocean Acres (New Jersey) | 3,383.04 mi (5,444.47 km) |
| Bargoed to Ocean City (New Jersey) | 3,417.05 mi (5,499.21 km) |
| Bargoed to Ocean Pines (Maryland) | 3,478.67 mi (5,598.38 km) |
| Bargoed to Ocean Pointe (Hawaii) | 7,166.80 mi (11,533.85 km) |
| Bargoed to Ocean Springs (Mississippi) | 4,420.59 mi (7,114.26 km) |
| Bargoed to Oceanside (California) | 5,346.58 mi (8,604.49 km) |
| Bargoed to Oceanside (New York) | 3,318.11 mi (5,339.98 km) |
| Bargoed to Ocoee (Florida) | 4,210.09 mi (6,775.49 km) |
| Bargoed to Oconomowoc (Wisconsin) | 3,800.10 mi (6,115.66 km) |
| Bargoed to Odenton (Maryland) | 3,512.22 mi (5,652.36 km) |
