| Penafiel to Oak Harbor (Washington) | 5,072.35 mi (8,163.15 km) |
| Penafiel to Oak Hills (Oregon) | 5,213.22 mi (8,389.87 km) |
| Penafiel to Oak Lawn (Illinois) | 3,955.48 mi (6,365.73 km) |
| Penafiel to Oak Park (California) | 5,612.89 mi (9,033.07 km) |
| Penafiel to Oak Park (Illinois) | 3,951.47 mi (6,359.28 km) |
| Penafiel to Oak Park (Michigan) | 3,723.35 mi (5,992.16 km) |
| Penafiel to Oak Ridge (Florida) | 4,118.33 mi (6,627.82 km) |
| Penafiel to Oak Ridge (New Jersey) | 3,357.61 mi (5,403.54 km) |
| Penafiel to Oak Ridge (Tennessee) | 3,987.90 mi (6,417.90 km) |
| Penafiel to Oakdale (California) | 5,521.21 mi (8,885.53 km) |
| Penafiel to Oakdale (Minnesota) | 4,076.43 mi (6,560.39 km) |
| Penafiel to Oakland (California) | 5,572.27 mi (8,967.70 km) |
| Penafiel to Oakland (New Jersey) | 3,345.37 mi (5,383.85 km) |
| Penafiel to Oakland Park (Florida) | 4,142.24 mi (6,666.30 km) |
| Penafiel to Oakleaf Plantation (Florida) | 4,075.49 mi (6,558.87 km) |
