| Porthcawl to Oak Harbor (Washington) | 4,659.79 mi (7,499.20 km) |
| Porthcawl to Oak Hills (Oregon) | 4,819.98 mi (7,757.01 km) |
| Porthcawl to Oak Lawn (Illinois) | 3,823.65 mi (6,153.57 km) |
| Porthcawl to Oak Park (California) | 5,335.23 mi (8,586.23 km) |
| Porthcawl to Oak Park (Illinois) | 3,817.22 mi (6,143.22 km) |
| Porthcawl to Oak Park (Michigan) | 3,611.18 mi (5,811.64 km) |
| Porthcawl to Oak Ridge (Florida) | 4,194.02 mi (6,749.62 km) |
| Porthcawl to Oak Ridge (New Jersey) | 3,322.12 mi (5,346.43 km) |
| Porthcawl to Oak Ridge (Tennessee) | 3,951.82 mi (6,359.85 km) |
| Porthcawl to Oakdale (California) | 5,200.11 mi (8,368.77 km) |
| Porthcawl to Oakdale (Minnesota) | 3,871.60 mi (6,230.75 km) |
| Porthcawl to Oakland (California) | 5,241.02 mi (8,434.61 km) |
| Porthcawl to Oakland (New Jersey) | 3,311.59 mi (5,329.50 km) |
| Porthcawl to Oakland Park (Florida) | 4,254.51 mi (6,846.98 km) |
| Porthcawl to Oakleaf Plantation (Florida) | 4,128.13 mi (6,643.59 km) |
