| Bargoed to Oak Harbor (Washington) | 4,660.66 mi (7,500.61 km) |
| Bargoed to Oak Hills (Oregon) | 4,821.53 mi (7,759.50 km) |
| Bargoed to Oak Lawn (Illinois) | 3,834.82 mi (6,171.54 km) |
| Bargoed to Oak Park (California) | 5,340.73 mi (8,595.08 km) |
| Bargoed to Oak Park (Illinois) | 3,828.32 mi (6,161.08 km) |
| Bargoed to Oak Park (Michigan) | 3,623.10 mi (5,830.81 km) |
| Bargoed to Oak Ridge (Florida) | 4,210.50 mi (6,776.15 km) |
| Bargoed to Oak Ridge (New Jersey) | 3,336.41 mi (5,369.43 km) |
| Bargoed to Oak Ridge (Tennessee) | 3,965.62 mi (6,382.05 km) |
| Bargoed to Oakdale (California) | 5,204.15 mi (8,375.27 km) |
| Bargoed to Oakdale (Minnesota) | 3,880.47 mi (6,245.02 km) |
| Bargoed to Oakland (California) | 5,244.67 mi (8,440.48 km) |
| Bargoed to Oakland (New Jersey) | 3,325.94 mi (5,352.58 km) |
| Bargoed to Oakland Park (Florida) | 4,271.82 mi (6,874.84 km) |
| Bargoed to Oakleaf Plantation (Florida) | 4,144.10 mi (6,669.29 km) |
