| Bargoed to Orangevale (California) | 5,162.99 mi (8,309.03 km) |
| Bargoed to Orchards (Washington) | 4,804.49 mi (7,732.08 km) |
| Bargoed to Orcutt (California) | 5,355.50 mi (8,618.84 km) |
| Bargoed to Oregon (Ohio) | 3,668.95 mi (5,904.60 km) |
| Bargoed to Oregon (Wisconsin) | 3,842.01 mi (6,183.12 km) |
| Bargoed to Oregon City (Oregon) | 4,825.82 mi (7,766.41 km) |
| Bargoed to Orem (Utah) | 4,769.89 mi (7,676.39 km) |
| Bargoed to Orinda (California) | 5,238.35 mi (8,430.31 km) |
| Bargoed to Orland Park (Illinois) | 3,843.91 mi (6,186.17 km) |
| Bargoed to Orlando (Florida) | 4,206.91 mi (6,770.36 km) |
| Bargoed to Ormond Beach (Florida) | 4,156.27 mi (6,688.86 km) |
| Bargoed to Oro Valley (Arizona) | 5,171.95 mi (8,323.45 km) |
| Bargoed to Oroville (California) | 5,127.22 mi (8,251.46 km) |
| Bargoed to Oshkosh (Wisconsin) | 3,760.95 mi (6,052.67 km) |
| Bargoed to Oskaloosa (Iowa) | 4,041.13 mi (6,503.57 km) |
