| Pontneddfechan to Oak Harbor (Washington) | 4,647.78 mi (7,479.88 km) |
| Pontneddfechan to Oak Hills (Oregon) | 4,808.41 mi (7,738.39 km) |
| Pontneddfechan to Oak Lawn (Illinois) | 3,819.44 mi (6,146.79 km) |
| Pontneddfechan to Oak Park (California) | 5,326.42 mi (8,572.04 km) |
| Pontneddfechan to Oak Park (Illinois) | 3,812.94 mi (6,136.34 km) |
| Pontneddfechan to Oak Park (Michigan) | 3,607.64 mi (5,805.94 km) |
| Pontneddfechan to Oak Ridge (Florida) | 4,195.06 mi (6,751.29 km) |
| Pontneddfechan to Oak Ridge (New Jersey) | 3,320.85 mi (5,344.39 km) |
| Pontneddfechan to Oak Ridge (Tennessee) | 3,950.07 mi (6,357.02 km) |
| Pontneddfechan to Oakdale (California) | 5,190.24 mi (8,352.88 km) |
| Pontneddfechan to Oakdale (Minnesota) | 3,865.42 mi (6,220.79 km) |
| Pontneddfechan to Oakland (California) | 5,230.88 mi (8,418.28 km) |
| Pontneddfechan to Oakland (New Jersey) | 3,310.38 mi (5,327.55 km) |
| Pontneddfechan to Oakland Park (Florida) | 4,256.49 mi (6,850.15 km) |
| Pontneddfechan to Oakleaf Plantation (Florida) | 4,128.61 mi (6,644.36 km) |
