| Merthyr Tudful to Oak Harbor (Washington) | 4,654.10 mi (7,490.05 km) |
| Merthyr Tudful to Oak Hills (Oregon) | 4,814.91 mi (7,748.84 km) |
| Merthyr Tudful to Oak Lawn (Illinois) | 3,827.91 mi (6,160.42 km) |
| Merthyr Tudful to Oak Park (California) | 5,333.85 mi (8,584.01 km) |
| Merthyr Tudful to Oak Park (Illinois) | 3,821.41 mi (6,149.96 km) |
| Merthyr Tudful to Oak Park (Michigan) | 3,616.22 mi (5,819.74 km) |
| Merthyr Tudful to Oak Ridge (Florida) | 4,204.05 mi (6,765.76 km) |
| Merthyr Tudful to Oak Ridge (New Jersey) | 3,329.69 mi (5,358.62 km) |
| Merthyr Tudful to Oak Ridge (Tennessee) | 3,958.86 mi (6,371.17 km) |
| Merthyr Tudful to Oakdale (California) | 5,197.34 mi (8,364.32 km) |
| Merthyr Tudful to Oakdale (Minnesota) | 3,873.52 mi (6,233.83 km) |
| Merthyr Tudful to Oakland (California) | 5,237.89 mi (8,429.57 km) |
| Merthyr Tudful to Oakland (New Jersey) | 3,319.23 mi (5,341.78 km) |
| Merthyr Tudful to Oakland Park (Florida) | 4,265.50 mi (6,864.65 km) |
| Merthyr Tudful to Oakleaf Plantation (Florida) | 4,137.57 mi (6,658.78 km) |
