| Porthcawl to Oakley (California) | 5,213.39 mi (8,390.15 km) |
| Porthcawl to Oakton (Virginia) | 3,530.66 mi (5,682.04 km) |
| Porthcawl to Oakville (Missouri) | 4,075.92 mi (6,559.55 km) |
| Porthcawl to Oatfield (Oregon) | 4,820.23 mi (7,757.41 km) |
| Porthcawl to Ocala (Florida) | 4,190.23 mi (6,743.52 km) |
| Porthcawl to Ocean Acres (New Jersey) | 3,368.25 mi (5,420.67 km) |
| Porthcawl to Ocean City (New Jersey) | 3,402.17 mi (5,475.26 km) |
| Porthcawl to Ocean Pines (Maryland) | 3,463.61 mi (5,574.14 km) |
| Porthcawl to Ocean Pointe (Hawaii) | 7,172.06 mi (11,542.32 km) |
| Porthcawl to Ocean Springs (Mississippi) | 4,406.29 mi (7,091.24 km) |
| Porthcawl to Oceanside (California) | 5,340.43 mi (8,594.60 km) |
| Porthcawl to Oceanside (New York) | 3,303.49 mi (5,316.45 km) |
| Porthcawl to Ocoee (Florida) | 4,193.65 mi (6,749.03 km) |
| Porthcawl to Oconomowoc (Wisconsin) | 3,789.57 mi (6,098.73 km) |
| Porthcawl to Odenton (Maryland) | 3,497.71 mi (5,629.03 km) |
